Jun 8, 2026 · 1h 57m
Poor sleep alters hunger hormones and drives weight gain
Eating for Better Sleep & Foods that Improve Metabolic Health | Dr. Marie-Pierre St-Onge
Understanding the bidirectional link between sleep and nutrition is crucial for preventing chronic metabolic dysfunction and managing weight.
- 1Sleep deprivation directly alters hunger hormones to increase appetite and drive weight gain.
- 2Diets rich in fiber and MCT oil actively improve sleep quality and metabolic health.
- 3Aligning meal timing with circadian rhythms prevents long-term cardiometabolic disruption.
The brief
Sleep deprivation does more than cause morning fatigue; it actively rewrites your biology by altering hunger hormones and driving weight gain. Dr. Marie-Pierre St-Onge joins the podcast to unpack this bidirectional relationship between sleep and nutrition.
What we eat directly influences how we sleep. Dietary choices like the Mediterranean diet, high fiber intake, and MCT oil have been shown to actively improve sleep quality while simultaneously bolstering long-term metabolic health.
The timing of our meals plays a critical role in this equation. Aligning eating patterns with our circadian rhythms prevents metabolic disruption, helping the body process nutrients efficiently and transition smoothly into deep, restorative sleep.
Optimizing cardiometabolic wellness requires looking beyond basic calorie counting. By understanding how sleep and diet reinforce one another, individuals can use practical, science-backed tools to build sustainable, long-term health habits.
What was said on this episode
30 statements · 15 positive · 12 negative · 3 neutral
Higher fiber intake is associated with more deep sleep.
“higher intakes of fiber were associated with more deep sleep”
Listen at 0:06
Higher saturated-fat intake is associated with less deep sleep.
“higher intakes of saturated fat, less deep sleep”
Listen at 0:11
More refined carbohydrates and simple sugars are associated with more sleep arousals.
“more refined carbohydrates, simple sugars, more arousals”
Listen at 0:14
Short sleep increases ghrelin in men.
“in men, specifically we saw an increase in ghrelin in response to short sleep”
Listen at 7:14
Short sleep reduces GLP-1 in women.
“In women, we saw a reduction in GLP1”
Listen at 7:24
Short sleep increased participants’ food intake by 300 calories.
“they ate 300 calories more in the short sleep condition”
Listen at 7:38
Sleep restriction is associated with 250–400 daily calories of overeating.
“A Meta analysis showed 250 to 400 calories of overeating”
Listen at 15:32
Two weeks of restricted sleep produced approximately half a kilogram of weight gain.
“participants gained half a kilo in a two week period”
Listen at 16:09
Short sleep did not change cortisol levels under the study conditions.
“There was no difference between the two conditions, adequate sleep or short sleep on cortisol levels.”
Listen at 17:21
Severe short-term sleep restriction did not affect glucose or insulin under controlled feeding.
“we didn't see any effect on glucose or insulin”
Listen at 18:26
Free-living metabolic abnormalities reflect combined effects of sleep loss, diet, and behavior.
“it's a combination of different things that causes the metabolic abnormalities that we notice in Free living populations”
Listen at 18:50
Six weeks of mild sleep restriction increases insulin resistance.
“insulin resistance was increased after six weeks of sleep restriction”
Listen at 21:23
Six weeks of mild sleep restriction increases blood pressure.
“We saw blood pressure was increased.”
Listen at 21:39
Sleep restriction increases energy expenditure while awake in a metabolic chamber.
“energy expenditure is actually increased in the context of sleep restriction in metabolic chamber”
Listen at 23:39
Sleep restriction increased energy expenditure by about 90 calories in the chamber study.
“it ended up being about 90 calories”
Listen at 25:01
Mediterranean-style diets are associated with adequate sleep and fewer insomnia symptoms.
“having a diet that more closely aligns with the Mediterranean diet was associated with better probability of having adequate sleep and reduced insomnia symptoms”
Listen at 30:09
The DASH diet outperformed an equivalent non-DASH diet regardless of salt content.
“the DASH diet, regardless of its salt content, did better than the equivalent non dash”
Listen at 33:12
Earlier eating is better for cardiometabolic health.
“eating earlier is better overall. For cardiometabolic health, eating earlier is better.”
Listen at 39:09
Sleeping outside one’s circadian preference makes good sleep more difficult.
“it's always harder to get a good night's sleep if you're not going with your internal clock”
Listen at 41:55
Optimal aging is associated with approximately 6.5–8 hours of sleep.
“the sweet spot really was six and a half to about seven and a half, eight hours for optimal aging”
Listen at 49:11
Women are more metabolically sensitive than men to poor sleep.
“women are more sensitive to the impact of poor sleep on different metabolic outcomes than men”
Listen at 51:03
Weight loss is typically first-line treatment for sleep apnea in people with excess weight.
“weight loss is typically like the first line treatment”
Listen at 54:14
Polysomnography is the standard first-line method for detecting sleep apnea.
“Polysomnography is the first line, you know, is what we use to detect sleep apnea”
Listen at 55:11
Two cups of kefir daily had no effect on cholesterol synthesis in mildly hypercholesterolemic men.
“there was no effect”
Listen at 58:01
Ginger increases the thermic effect of food.
“there's an increase in the thermic effect of food”
Listen at 1:06:09
MCT consumption increased thermic effect by approximately 45–60 calories per meal.
“it was about 45 to 50, 60 calories”
Listen at 1:21:59
A weight-loss study found greater weight loss with MCT oil than olive oil.
“found greater weight loss with mct”
Listen at 1:22:52
Plant-based foods improve heart health and reduce risks of diabetes, cancer, and metabolic disease.
“plant based products are so much healthier in terms of heart health, reduction of type 2 diabetes, cancer risk and other metabolic diseases”
Listen at 1:27:38
People should minimize refined white flour, rice, pasta, and similar foods.
“reducing white foods as much as possible as well”
Listen at 1:28:31
Oils remaining liquid at room temperature are generally better choices.
“I think that oils that remain liquid at room temperature, that should be your barometer for what's better to use”
Listen at 1:38:53
Statements are attributed to the speaker as said on the episode and reflect their view at the time, not PodLume's. They are not advice.