Essentials: Control Sugar Cravings & Metabolism with Science-Based Tools

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  Welcome to Huberman Lab Essentials where we revisit past episodes for the most potent and actionable science-based tools

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  for mental health, physical health, and performance.

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  I'm Andrew Huberman, and I'm a professor of neurobiology and ophthalmology at Stanford School of Medicine.

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  Today we are going to discuss sugar, in particular,

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  how our nervous system regulates our sugar intake and our seeking of sugar.

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  We are going to place sugar into its proper context.

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  The way I want to start off by doing that is to tell you a little bit of what happens when we eat and a little bit

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  of what the brain does to respond to those events.

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  So what happens when we eat?

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  Let's just take a, what I call top contour view of the hormonal response to ingesting food.

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  Anytime we eat, that is the consequence of a number of things that happened before we ate.

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  There's a hormone in our brain and body called ghrelin, spelled G-H-R-E-L-I-N.

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  Ghrelin is a hormone that increases.

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  Depending on how long it's been since we ate last, okay?

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  So the longer it's been since we had a meal, ghrelin levels are going to be higher and higher and higher.

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  And it essentially makes us hungry by interacting with particular neurons in an area of the brain called the arcuate nucleus

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  of the hypothalamus and some other areas as well, like the lateral hypothalamus.

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  And then when we eat, typically what happens is ghrelin levels go down.

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  So it's a very logical system.

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  When we eat, assuming that we eat carbohydrates, but even if we just eat some protein and some fats,

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