HoldsUp

Marie-Pierre St-Onge

Columbia University School of Medicine

Marie-Pierre St-Onge, PhD, is a professor of nutritional medicine at Columbia University School of Medicine. Her research investigates the bidirectional relationships between sleep, nutrition, and metabolic health. Her published work covers topics such as the impact of dietary patterns and meal timing on sleep quality and insomnia, as well as the effects of sleep duration and restriction on cardiometabolic disease risk.

40 claims checked on air: 1 context 1 overstated 37 supported 1 unverified

What they said on air

4 citing their own research

0:00:00supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Higher dietary fiber intake is associated with more deep slow-wave sleep, higher saturated fat intake is associated with less deep sleep, and higher intake of simple sugars and refined carbohydrates is associated with more sleep arousals.

"And we found that higher intakes of fiber were associated with more deep sleep, higher intakes of saturated fat, less deep sleep, and then more refined carbohydrates, simple sugars, more arousals." (said at 0:00:00)

The claim directly summarizes the findings of an inpatient polysomnography study by St-Onge et al. (2016) in 26 healthy adults. In that study, linear regression of ad libitum dietary intake and sleep architecture showed that higher fiber intake was significantly associated with greater slow-wave sleep (SWS), higher saturated fat intake predicted less SWS, and higher intake of sugars and non-fiber carbohydrates was significantly associated with more nocturnal sleep arousals.

0:04:15supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

In the 2006 Nurses' Health Study tracking nurses over 14 years, those reporting 5 to 6 hours of sleep per night had significantly higher rates of weight gain than those sleeping 7 to 8 hours per night.

"There was a famous Nurses' Health Study that I really like to cite when I give talks that was published in 2006 where they tracked nurses over 14 years and those nurses that reported sleeping 5-6 hours had much higher rate of weight gain over that 14-15 year period than the nurses who had reported sleeping 7 or 8 hours per night." (said at 0:04:15)

The 2006 prospective study by Patel et al. evaluated 68,183 participants from the Nurses' Health Study followed for 16 years (1986-2002). Women sleeping 5 hours or less and 6 hours per night had significantly higher rates of subsequent weight gain and incident obesity compared to those sleeping 7 hours per night.

0:06:45supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Restricting sleep to 4 hours in bed for 5 nights leads to an increase in fasting ghrelin levels specifically in men.

"From that study, we showed that in men specifically, we saw an increase in ghrelin in response to the short sleep, so this hormone that triggers food intake." (said at 0:06:45)

A randomized crossover study by St-Onge et al. (PMID 23115399) evaluated the effects of short sleep (4 hours in bed) versus habitual sleep (9 hours in bed) under controlled feeding conditions in healthy men and women. The study found that short sleep increased fasting (P = 0.054) and morning total ghrelin levels in men but not in women, while women showed decreases in afternoon GLP-1 levels instead.

0:07:00supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Restricting sleep to 4 hours in bed for 5 nights leads to a reduction in GLP-1 levels specifically in women.

"In women, we saw a reduction in GLP-1, interestingly enough. Glucagon-like peptide-1. So the satiety hormone was reduced as a result of short sleep in women." (said at 0:07:00)

A randomized crossover study in 27 healthy adults (PMID 23115399) found that restricting sleep to 4 hours in bed led to a significant reduction in afternoon GLP-1 levels in women compared to habitual sleep (9 hours in bed), an effect that was not observed in men. A recent systematic review (PMID 40843663) notes that this remains the primary trial evaluating sex-specific GLP-1 responses to sleep restriction.

0:07:15supportedhighEating for Better Sleep & Foods that Improve Metabolic Healt

Sleep-restricted individuals consume approximately 300 more calories per day during ad libitum feeding compared to when they receive adequate sleep.

"And then when we measured their food intake in the lab, they ate 300 calories more in the short sleep condition than when they got their regular adequate sleep of at least 7 and 1/2 hours, a little more than that per night." (said at 0:07:15)

Multiple systematic reviews and meta-analyses of randomized crossover and controlled feeding trials demonstrate that experimental sleep restriction leads to a statistically significant increase in ad libitum daily energy intake, typically averaging an extra 200 to 300 kcal per day compared to habitual/adequate sleep.

0:07:35supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Sleep restriction upregulates neuronal activation in brain reward centers in response to food stimuli.

"We looked at neuronal responses to food stimuli. We found upregulation in reward centers of the brain in the context of sleep restriction compared to the context of adequate sleep." (said at 0:07:35)

Randomized controlled crossover fMRI trials show that partial sleep restriction (e.g., 4 hours/night in bed) significantly increases neuronal activation in response to food stimuli in brain regions linked to reward processing and salience, including the nucleus accumbens, putamen, insula, thalamus, and prefrontal cortex.

0:15:15supportedhighEating for Better Sleep & Foods that Improve Metabolic Healt

A meta-analysis demonstrates that sleep restriction causes people to overeat between 250 and 400 calories per day.

"A meta-analysis showed 250 to 400 calories of overeating." (said at 0:15:15)

Meta-analyses of experimental sleep restriction trials consistently show that restricting sleep causes a significant increase in daily caloric intake, typically averaging between ~150 and ~385 kcal per day. For example, a 2021 meta-analysis of intervention trials (PMID: 33001515) found that partial sleep restriction (≤5.5 hours/night) resulted in a mean increase of 204 kcal/day (95% CI: 112 to 295 kcal/day), while other meta-analyses report comparable increases across all macronutrients.

0:15:56supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Restricting sleep to about 5 hours per night for two weeks causes individuals to gain approximately half a kilogram (one pound) of weight.

"Naima Covassin in 2022 published a paper where they had sleep restriction about 5 hours per night versus 7 and 1/2 hours per night for 2 weeks and participants gained half a kilo in a 2-week period." (said at 0:15:56)

The claim accurately reflects experimental findings from an inpatient randomized crossover trial (Covassin et al., 2022, PMID 35361348). In the study, healthy adults subjected to 14 days of sleep restriction (a 4-hour sleep opportunity per night with ad libitum food access) had significantly higher energy intake and gained significantly more weight (~0.5 kg) compared to the control condition (9-hour sleep opportunity). Certainty is moderate due to the small sample size (n=12), despite the rigorous randomized inpatient crossover design.

0:17:05unverifiedvery lowEating for Better Sleep & Foods that Improve Metabolic Healt

Five nights of severe sleep restriction (4 hours in bed per night) under controlled isocaloric laboratory feeding conditions does not alter cortisol levels, fasting glucose, or insulin levels.

"So, if you're thinking about physiological stress measured by cortisol levels in that study, actually cortisol wasn't changed... Well, in that study also, we didn't see any effect on glucose or insulin. Nothing. The curves were superimposable." (said at 0:17:05)

A specific publication directly demonstrating that five nights of severe sleep restriction (4 hours in bed per night) under controlled isocaloric laboratory feeding conditions produces no changes in cortisol, fasting glucose, or insulin levels was not successfully retrieved within the search budget. This does not indicate the claim is false, but rather that the exact study and outcome parameters could not be verified.

0:21:05supportedmoderatetheir own paperEating for Better Sleep & Foods that Improve Metabolic Healt

Six weeks of mild sustained sleep restriction (reduced by 1.5 hours per night to roughly 6 hours) in free-living individuals increases insulin resistance, reduces insulin sensitivity, and increases blood pressure.

"And now, when we did that, we saw that insulin resistance was increased after 6 weeks of sleep restriction compared to adequate sleep. We saw insulin sensitivity was reduced. It was worse, actually, in postmenopausal women compared to premenopausal women. We saw blood pressure was increased." (said at 0:21:05)

Randomized crossover trials conducted by St-Onge and colleagues in free-living women demonstrate that 6 weeks of mild sleep restriction (curtailing habitual sleep by 1.5 hours per night to ~6.2 hours per night) significantly increases fasting insulin, increases HOMA-IR, impairs insulin sensitivity, and increases ambulatory and office blood pressure.

0:23:05supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Whole-room indirect calorimetry shows that 24-hour energy expenditure increases by approximately 5% (around 90 calories) during sleep restriction due to the metabolic cost of extended wakefulness.

"And we were able to show that energy expenditure is actually increased in the context of sleep restriction in the metabolic chamber. Because it's more costly energetically to remain awake than to fall asleep... Yeah, so for us it was about 5% of energy increased. But it ended up being about 90 calories" (said at 0:23:05)

A highly controlled inpatient metabolic chamber study in healthy adults demonstrated that 5 days of sleep restriction increased 24-hour total daily energy expenditure by approximately 5% (to meet the energetic demands of extended wakefulness). However, ad libitum food intake exceeded this energetic requirement, resulting in net weight gain.

0:29:00supportedlowtheir own paperEating for Better Sleep & Foods that Improve Metabolic Healt

Data from the Multi-Ethnic Study of Atherosclerosis (MESA) shows that closer adherence to a Mediterranean diet is associated with higher probability of adequate sleep duration and fewer insomnia symptoms.

"and we asked the question of diet quality and its impact on sleep duration, insomnia symptoms, and we found that having a diet that more closely aligns with the Mediterranean diet was associated with better probability of having adequate sleep and reduced insomnia symptoms in this cohort." (said at 0:29:00)

An analysis of 2,068 participants in the Multi-Ethnic Study of Atherosclerosis (MESA) evaluated the relationship between alternate Mediterranean diet (aMed) scores, actigraphy-measured sleep duration, and self-reported insomnia symptoms. Moderate-to-high adherence to a Mediterranean diet was significantly associated with higher odds of adequate sleep duration (6-7 vs. <6 hours/night) and lower odds of reporting insomnia symptoms accompanied by short sleep. Because this evidence is observational, certainty is graded as low.

0:29:45supportedlowtheir own paperEating for Better Sleep & Foods that Improve Metabolic Healt

In a longitudinal Women's Health Initiative analysis, women adhering more closely to a Mediterranean diet or DASH diet were significantly less likely to have persistent or newly developed insomnia at 3 years.

"And we found that the women who had a diet that was more closely aligned to the Mediterranean diet, but we also looked at an American type of diet profile called the DASH diet, the Dietary Approaches to Stop Hypertension. Women who had a dietary profile closer to those two types of diets, healthful diets, were less likely to have insomnia at 3 years." (said at 0:29:45)

A longitudinal analysis of 74,513 postmenopausal women from the Women's Health Initiative Observational Study (WHI-OS) demonstrated that greater baseline adherence to either the alternate Mediterranean (aMed) diet or the DASH diet was significantly associated with reduced odds of persistent ('stable') or newly developed insomnia at 3-year follow-up (6.3% lower odds for aMed and 8.5% lower odds for DASH, both p < 0.005). As an observational cohort study, GRADE certainty begins at low.

0:32:48supportedhighEating for Better Sleep & Foods that Improve Metabolic Healt

The DASH diet reduces blood pressure by increasing intakes of fruits, vegetables, nuts, seeds, and low-fat dairy compared to an average American diet.

"Dietary Approaches to Stop Hypertension, developed to prevent hypertension, reduce blood pressure in people by increasing intakes of fruits and vegetables, nuts and seeds, consuming low-fat dairy, more plant-based types of diet, and can be—has been tested in a low salt or regular salt profile." (said at 0:32:48)

The original DASH multicenter randomized controlled feeding trial (Appel et al., 1997) demonstrated that a dietary pattern rich in fruits, vegetables, low-fat dairy foods, nuts, and seeds significantly lowered systolic and diastolic blood pressure compared to a control diet representative of average American intake, while holding sodium and body weight constant. Extensive subsequent meta-analyses of randomized controlled trials consistently confirm these blood pressure-lowering effects.

0:33:17supportedhighEating for Better Sleep & Foods that Improve Metabolic Healt

The DASH diet improves blood pressure compared to an average American diet regardless of salt content, while salt-sensitive individuals experience greater blood pressure reductions on a reduced-salt diet.

"There's salt sensitivity, so there are some people who are very sensitive to salt and so having a reduced salt diet will really improve their blood pressure. Others not so much, but the DASH diet, regardless of its salt content, did better than the equivalent non-DASH, which would be your average, you know, American diet." (said at 0:33:17)

Evidence from multicenter randomized feeding trials, notably the landmark DASH-Sodium trial, confirms that the DASH diet significantly reduces systolic and diastolic blood pressure compared to a typical American control diet across all levels of sodium intake (high, intermediate, and low). Furthermore, salt-sensitive individuals exhibit substantially greater blood pressure reductions in response to dietary sodium restriction compared to salt-resistant individuals.

0:36:57supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

In an inpatient polysomnography trial, self-selecting food intake resulted in a greater than 70% increase in sleep onset latency compared to a controlled feeding condition.

"It wasn't different in terms of duration, but it was different in time it took them to fall asleep, which was almost over 70% longer to fall asleep when they self-selected their diet." (said at 0:36:57)

In an inpatient randomized-crossover polysomnography study of 26 healthy adults by St-Onge et al. (2016), participants consumed a controlled diet for the first 4 days and self-selected (ad libitum) food intake on day 5. Sleep onset latency was significantly longer following the self-selected diet compared to the controlled diet phase (P = 0.0085, increasing from ~17 minutes to ~29 minutes, a ~70% increase).

0:37:15supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

In an inpatient polysomnography study, slow-wave deep sleep was approximately 20% shorter when participants self-selected their diet compared to when they consumed a controlled diet.

"And their slow-wave sleep, so deep sleep, was shorter. I think it was about 20% shorter when they self-selected their diet compared to what we had given them." (said at 0:37:15)

A 2016 randomized-crossover inpatient study led by Marie-Pierre St-Onge evaluated sleep architecture in 26 healthy adults using polysomnography after 4 days of a fixed controlled diet versus a day of self-selected (ad libitum) eating. The study found that self-selected diet intake resulted in significantly less slow-wave sleep (SWS; P = 0.0430) and longer sleep onset latency compared to the controlled diet.

0:38:00supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Higher dietary fiber intake is associated with an increase in slow-wave sleep duration.

"And we found that higher intakes of fiber were associated with more deep sleep." (said at 0:38:00)

Multiple controlled in-laboratory sleep studies using polysomnography have demonstrated a significant positive association between higher dietary fiber intake and slow-wave sleep (SWS) duration. Specifically, an inpatient study by St-Onge et al. (n=26) found greater fiber intake predicted more SWS (P = 0.0286), and a study by Spaeth et al. (n=50) similarly observed that greater fiber intake correlated with more SWS (r = 0.33-0.35, P = 0.02-0.03).

0:38:08supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Higher dietary saturated fat intake is associated with reduced slow-wave sleep duration.

"Higher intakes of saturated fat, less deep sleep." (said at 0:38:08)

A controlled crossover study in healthy adults (n=26) measuring sleep architecture via polysomnography demonstrated that higher intake of saturated fat (as a percentage of total energy) was significantly associated with reduced slow-wave sleep (SWS) duration (P = 0.0422).

0:38:13supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Higher intake of refined carbohydrates and simple sugars is associated with an increased number of sleep arousals.

"And then more refined carbohydrates, simple sugars, more arousals." (said at 0:38:13)

A randomized-crossover inpatient study evaluating diet and objective polysomnographic sleep measures (PMID: 26156950) found that a higher percentage of energy intake from sugar and other non-fiber carbohydrates was significantly associated with an increased number of sleep arousals during nocturnal sleep.

0:39:15supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Eating meals earlier in the day is associated with better cardiometabolic health.

"For cardiometabolic health, eating earlier is better." (said at 0:39:15)

A substantial body of randomized trials and network meta-analyses supports the claim that consuming meals earlier in the day (such as early time-restricted eating, eTRE) improves cardiometabolic health parameters—particularly insulin resistance, fasting glucose, and blood pressure—relative to eating later in the day or habitual control diets.

0:49:23supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Sleep duration exhibits a U-shaped relationship with organ aging, with 6.5 to 7.5 or 8 hours identified as the optimal duration for biological clock health across organs.

"And the sweet spot really was 6 and 1/2 to about 7 and 1/2, 8 hours for optimal aging. Once you get to below that, it's basically U-shaped, right? So, too much of one thing is not good, too little is not good. You want to be in the sweet spot. Most organs for optimal aging was in this 6 and 1/2 to 7.8." (said at 0:49:23)

A large-scale study analyzing UK Biobank data (aged 37-84 years) evaluated 23 biological aging clocks derived from multi-organ imaging, plasma proteomics, and metabolomics. The researchers observed a systemic, U-shaped relationship between sleep duration and biological age gaps across organ systems, identifying the lowest biological age gaps at 6.4 to 7.8 hours of sleep per night.

0:50:21supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Women tend to have longer average sleep durations than men across the lifespan.

"So, women tend to sleep a little longer than men across lifespan." (said at 0:50:21)

Large-scale epidemiological and objective actigraphy/wearable tracking studies demonstrate that women generally average longer total sleep duration than men across adulthood, although the magnitude of this difference varies by life stage and tends to diminish in older age. Women also consistently experience higher rates of nighttime awakenings and self-reported sleep disruptions.

0:50:26supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

More women than men report insomnia symptoms, difficulty falling asleep, and difficulty maintaining sleep across adulthood.

"More women than men report having difficulties with sleep, insomnia, for example, insomnia symptoms. More women than men say they have difficulty falling asleep, difficulty maintaining sleep uh across the adult lifespan." (said at 0:50:26)

Multiple systematic reviews and meta-analyses of epidemiological studies confirm that women have a significantly higher prevalence of insomnia symptoms and insomnia diagnoses compared to men across adulthood, with pooled risk ratios and odds ratios consistently showing roughly 1.4- to 1.6-fold higher risk in females.

0:51:12supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Women exhibit elevated blood pressure at lower thresholds of obstructive sleep apnea severity compared to men.

"So, for blood pressure, at lower sleep apnea, for example, at lower thresholds of sleep apnea, their blood pressure would be higher uh than men." (said at 0:51:12)

Evidence from epidemiological and clinical reviews indicates that women with obstructive sleep apnea (OSA) experience heightened cardiovascular vulnerability, including elevated blood pressure and hypertension risk, at lower indices of OSA severity or lower apnea-hypopnea index (AHI) levels compared to men.

0:57:45supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Consuming two cups (500 ml) of kefir daily for one month had no significant effect on cholesterol synthesis in men with mildly elevated cholesterol.

"We gave them two cups per day versus just regular milk for a month... And uh and we measured the amount of cholesterol they produced at baseline and end point in both phases, and there was no effect. It was a null study." (said at 0:57:45)

A randomized crossover controlled trial by St-Onge et al. (2002) evaluated the effects of 4 weeks (1 month) of daily kefir supplementation (500 mL/day) compared to milk in 13 mildly hypercholesterolemic men. The study found that kefir consumption had no significant effect on plasma lipid concentrations (total cholesterol, LDL-C, HDL-C, or triglycerides) or on cholesterol fractional synthesis rates. Certainty is rated moderate due to the small sample size (imprecision).

1:01:40supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Supplementation with coffee-derived mannan oligosaccharides resulted in statistically significant reductions in adipose tissue mass in overweight men, but not in women.

"We gave it to our study participants. We measured their body composition. We found an effect on body composition in men, not in women... It was statistically significant." (said at 1:01:40)

A double-blind, randomized, placebo-controlled trial evaluating 4 g/day of coffee-derived mannooligosaccharides (MOS) during a 12-week weight-loss program found statistically significant reductions in total, subcutaneous, and visceral adipose tissue in overweight men compared to placebo, whereas no significant differences in body weight or adipose tissue compartments were observed between MOS and placebo in women.

1:03:50supportedhighEating for Better Sleep & Foods that Improve Metabolic Healt

Consuming dietary fiber from oats reduces blood cholesterol levels.

"So, consuming fiber from oats reduces cholesterol levels." (said at 1:03:50)

Multiple systematic reviews and meta-analyses of randomized controlled trials demonstrate that dietary fiber from oats (specifically oat beta-glucan, typically at doses of 3 g/day or more) significantly lowers total cholesterol and LDL-cholesterol levels, with little effect on HDL-cholesterol or triglycerides.

1:06:12overstatedlowEating for Better Sleep & Foods that Improve Metabolic Healt

Consuming ginger powder in warm water increases the thermic effect of food and elevates energy expenditure over several hours.

"So, we think through the capsaicin receptor, there's an increase in the thermic effect of food." (said at 1:06:12)

The claim derives from a small pilot randomized crossover trial in 10 overweight men (PMID 22538118) where consuming 2 g of ginger powder in hot water with breakfast showed a small, borderline increase in calculated thermic effect of food (~43 kcal/d, p = 0.049). However, total resting energy expenditure and the postprandial energy expenditure area under the curve were not significantly different from control (p = 0.43). Furthermore, subsequent randomized trials in healthy adults (e.g., PMID 33487261, PMID 23021155) have failed to replicate any significant acute thermogenic effect or increase in diet-induced thermogenesis from ginger.

1:12:02supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Eating identical meals later in the day reduces fat oxidation compared to consuming those meals earlier in the day within the same duration eating window.

"And the meals, especially the meals later in the day, that were consumed late relative to the earlier version of those meals, led to less fat oxidation." (said at 1:12:02)

Rigorous randomized crossover clinical feeding trials demonstrate that consuming identical meals later in the day compared to earlier in the day reduces fat oxidation and promotes pathways favoring lipid storage. For instance, Gu et al. (2020) demonstrated via randomized crossover feeding that consuming a late dinner (22:00 vs. 18:00) with identical macronutrient composition significantly reduced dietary fatty acid oxidation and free fatty acid mobilization during the postprandial/nocturnal period. Similarly, Vujovic et al. (2022) found that late eating decreased waketime energy expenditure and altered adipose gene expression pathways toward decreased lipolysis and increased adipogenesis.

1:15:36supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

In a weight loss study by Marta Garaulet, participants who ate their main meal (lunch) earlier in the day achieved greater weight loss than those who ate lunch later.

"I'm thinking of work by Marta Garaulet, where she showed that in her weight loss program, the participants who have lunch, so their bigger meal is lunch, who have their lunch earlier in the day, have better weight loss than those who have their lunch later in the day." (said at 1:15:36)

A 20-week prospective weight-loss intervention study led by Marta Garaulet in 420 overweight and obese individuals found that participants who ate their main meal (lunch) earlier in the day (before 15:00) lost significantly more weight and had a faster weight-loss rate than those who ate lunch later (after 15:00), despite similar total caloric intake and estimated energy expenditure.

1:18:45supportedhighEating for Better Sleep & Foods that Improve Metabolic Healt

Medium-chain triglycerides travel directly to the liver and are metabolized more rapidly than long-chain triglycerides, which enter peripheral circulation and are deposited into adipose tissue.

"So the medium-chain triglycerides, they travel directly to the liver, they get metabolized, we burn them off more readily than the long-chain triglycerides that travel across the peripheral circulation, get deposited in adipose tissue and the sort." (said at 1:18:45)

The physiological pathway of medium-chain triglycerides (MCTs) versus long-chain triglycerides (LCTs) is well established. Unlike LCTs, which are re-esterified into triacylglycerols, packaged into chylomicrons, and transported via the lymphatic system into peripheral circulation where they can be stored in adipose tissue, MCTs are hydrolyzed into medium-chain fatty acids, absorbed directly into the portal vein, and transported straight to the liver for rapid beta-oxidation and ketogenesis.

1:19:02supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Consuming medium-chain triglycerides increases the thermic effect of food by approximately 45 to 60 calories compared to standard dietary fats.

"In both men and women, there was an increase in thermic effect of food so you burned slightly more calories from the the meal that contained medium-chain triglycerides compared to the meal that contained your standard fat." (said at 1:19:02)

A systematic review and meta-analysis of randomized crossover studies confirmed that meals containing medium-chain triglycerides (MCTs) elicit a significantly higher diet-induced thermogenesis (thermic effect of food) compared to standard long-chain triglycerides (LCTs). Controlled acute feeding trials measuring postprandial energy expenditure over 6 hours report differences in diet-induced thermogenesis that typically range from approximately 20 to 60 kcal per test meal or overfeeding challenge, depending on the dose and meal size, although some multi-week studies note potential attenuation of the total daily energy expenditure increase over time.

1:22:24supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

The Portfolio Diet achieved blood cholesterol reductions equivalent to those produced by statin medications in a head-to-head trial.

"This diet was went on a head-to-head comparison with lipid-lowering agent, right? Like a... Like a statin... They had the same cholesterol reduction as a statin." (said at 1:22:24)

In a randomized controlled trial published in JAMA (Jenkins et al., 2003), 46 hyperlipidemic adults were randomized to a low-saturated-fat control diet, the control diet plus 20 mg/day lovastatin, or a dietary portfolio containing plant sterols, soy protein, viscous fibers, and almonds. After 4 weeks, LDL cholesterol decreased by 28.6% in the dietary portfolio group and 30.9% in the lovastatin group, with no statistically significant difference in efficacy between the two active treatments.

1:22:27supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Consuming medium-chain triglycerides in place of olive oil produces greater weight loss in a weight loss diet intervention.

"And then we did follow-up study of a weight loss study with medium-chain triglyceride. This time around it was just purified MCT oil, not added with other types, versus olive oil, which is much more acceptable, and found greater weight loss with MCT." (said at 1:22:27)

A 16-week randomized controlled weight-loss trial (St-Onge et al., 2008) directly compared 18–24 g/day of MCT oil versus olive oil within an energy-restricted weight loss intervention in overweight adults. Participants consuming MCT oil achieved significantly greater weight loss (-1.67 ± 0.67 kg difference at endpoint) and greater reductions in body fat and intra-abdominal adipose tissue compared to those consuming olive oil. Broader meta-analyses of randomized trials similarly find that substituting medium-chain triglycerides for long-chain triglycerides (such as olive oil) yields modest but statistically significant reductions in body weight and fat mass.

1:27:16supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Plant-based dietary patterns reduce the risk of cardiovascular disease, type 2 diabetes, cancer, and metabolic diseases.

"because we know that plant-based products are so much healthier in terms of heart health, reduction of type 2 diabetes, cancer risk, and other metabolic diseases." (said at 1:27:16)

A 2023 systematic review and meta-analysis of 76 prospective observational cohorts including over 2.2 million participants found that higher adherence to plant-based dietary patterns was significantly associated with a reduced risk of type 2 diabetes (RR 0.82), cardiovascular disease (RR 0.90), cancer (RR 0.91), and all-cause mortality (RR 0.84). The protective associations were even stronger for healthy plant-based diets emphasizing whole grains, fruits, vegetables, and legumes.

1:36:30supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Consuming snack chips fried in corn oil leads to an improved lipid profile and lower lipoprotein(a) levels compared to low-fat high-carbohydrate or high-fat snacks.

"And yeah, the the the better lipid profile was the one with was the one from the the corn chips. They had the better lipid. Yeah. And they had less uh lipoprotein little a, which is another, you know, factor cardiometabolic risk factor." (said at 1:36:30)

A randomized controlled crossover trial by St-Onge et al. (2007; PMID: 17556685) in 33 adults evaluated controlled diets incorporating snack chips fried in corn oil (high-PUFA) compared with low-fat (high-carbohydrate) and high-fat snacks. The high-PUFA snack diet resulted in significant reductions in LDL cholesterol (12.5%), total cholesterol (10.7%), and triacylglycerol concentrations compared with the other snack diets, confirming that consuming snack chips fried in corn oil improves the overall lipid profile.

1:39:21needs contextmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Peanut oil has a higher smoke point than olive oil, making it more suitable for high-temperature frying.

"Olive oil has a lower smoke point than than other seed oils. So peanut oil, for example, has a higher smoke point. So you can fry in peanut oil. You wouldn't fry anything in olive oil." (said at 1:39:21)

While refined peanut oil typically has a higher nominal smoke point (~230°C) than extra virgin olive oil (~190–210°C), food science research shows that smoke point is not a reliable indicator of an oil's stability or suitability for high-temperature frying. Comparative frying studies demonstrate that extra virgin olive oil exhibits superior oxidative stability and generates fewer harmful degradation products (such as conjugated dienes and polar compounds) over extended frying times compared to peanut oil, largely due to its high monounsaturated fatty acid content and antioxidant polyphenols.

1:51:56supportedmoderateEating for Better Sleep & Foods that Improve Metabolic Healt

Fruits and vegetables contain non-nutrient bioactive components like polyphenols that nourish gut microbiota and may enhance the health benefits of dietary fiber.

"So yes, there is fiber in fruits and vegetables, but there's also all sorts of polyphenols, right? All sorts of non-nutrient components that themselves may have benefits for health that we don't fully understand yet that feed your gut that are maybe just as relevant that may enhance fiber's impact on health." (said at 1:51:56)

Scientific reviews confirm that plant foods contain non-nutrient bioactive compounds, such as polyphenols, which modulate and support the gut microbiota. Furthermore, polyphenols and dietary fiber have well-documented synergistic interactions: dietary fiber often acts as a carrier delivering polyphenols to the colon, while their combined fermentation enhances short-chain fatty acid (SCFA) production, shapes microbial diversity, and strengthens gut barrier function.

1:53:30supportedmoderatetheir own paperEating for Better Sleep & Foods that Improve Metabolic Healt

Sleep quality and dietary choices share a bidirectional relationship, where inadequate sleep degrades dietary choices and poor nutrition negatively affects sleep.

"So, you know, I talk often about a vicious cycle where you don't sleep well, you don't eat well, then that makes you not sleep so well and really hoping for people to get into a helpful cycle, right? Where you get good sleep, where you can make good food choices that then helps you get better sleep to keep propelling this this cycle of better health." (said at 1:53:30)

Evidence from systematic reviews and experimental studies supports a bidirectional relationship between sleep and diet. Sleep restriction and poor sleep quality have been consistently shown to increase the preference for and intake of high-fat, high-carbohydrate, and ultra-processed foods. Conversely, poor dietary patterns (such as diets high in ultra-processed foods or refined carbohydrates) are associated with worse sleep quality and increased sleep fragmentation, whereas healthier diets (e.g., the Mediterranean diet) correlate with better sleep outcomes.

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