Nutrition Videos

How Circadian Rhythms Affect Blood Sugar Levels

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The same meal eaten at the wrong time of day can double blood sugars.

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Back with the next installment of the chronobiology series! We previously explored eating breakfast for weight loss (Is Breakfast the Most Important Meal for Weight Loss? ( and Is Skipping Breakfast Better for Weight Loss? (, introduced chronobiology (How Circadian Rhythms Can Control Your Health and Weight (, and looked at the science on eating more in the mornings than the evenings (Eat More Calories in the Morning to Lose Weight (; Breakfast Like a King, Lunch Like a Prince, Dinner Like a Pauper (; Eat More Calories in the Morning Than the Evening (

Next up, you’ll see How to Sync Your Central Circadian Clock to Your Peripheral Clocks (

And the series will wrap up in the next couple weeks with:
• The Metabolic Harms of Night Shifts and Irregular Meals
• Shedding Light on Shedding Weight
• Why People Gain Weight in the Fall

Note: The Israeli 700/500/200 study that I mentioned is in the Breakfast Like a King, Lunch Like a Prince, Dinner Like a Pauper video in more detail.

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Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.

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Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM

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