Hormones and Sunlight: Controlling Appetite and Regulating Blood Sugar

TLDR Hormones and the nervous system work together to regulate hunger and satiety, with the hypothalamus and insular cortex playing important roles in controlling feeding behaviors. Getting ample sunlight can reduce appetite and regulate blood sugar by activating specific neurons in the brain.

Timestamped Summary

00:00 Hormones play a significant role in controlling various processes in the brain and body.
05:53 Hormones and the nervous system work together to regulate hunger and satiety, with the hypothalamus and insular cortex playing important roles in controlling feeding behaviors.
11:40 The discovery of the arcuate nucleus in the brain has revealed a set of neurons that release molecules that either accelerate or reduce appetite, with alpha MSH reducing appetite and AGRP neurons stimulating eating.
18:19 Getting ample sunlight, specifically ultraviolet light, can reduce appetite by activating MSH neurons and keeping the break on appetite in check.
24:52 Ghrelin secretion can be adjusted by shifting meal times by about 45 minutes per day, allowing for more flexibility in eating schedules and potential health benefits.
30:55 CCK, a hormone released by the gut, can suppress appetite and reduce feeding when stimulated by fatty acids, amino acids, and sugar, but the release of CCK can be specifically triggered by omega-3 fatty acids and conjugated linoleic acid (CLA).
37:26 Consuming the proper amino acids, omega-3 fatty acids, and CLA can help suppress appetite and prevent overeating by triggering the release of CCK, a hormone that signals satiety.
43:42 Emulsifiers found in highly processed foods strip away the mucosal lining of the gut, causing neurons to retract and preventing the deployment of satiety signals, leading to overeating and a disruption in the gut-brain axis.
49:42 Highly processed foods disrupt the lining of the gut, leading to weight gain, disruption of satiety signals, and an increase in diabetes and other health issues.
56:10 The order in which you consume macronutrients, particularly carbohydrates and fats, can significantly affect the rate of insulin and glucose secretion into the blood, with eating fibrous foods first blunting the glucose increase caused by carbohydrates.
01:02:31 Movement before and after eating can modulate blood glucose levels, with intense exercise or even a walk dampening glucose levels and promoting the sequestering of glucose towards muscle and glycogen stores, while the order in which you consume foods, as well as certain foods and exercise, can also impact blood glucose regulation.
01:08:39 Managing glucose levels in the body through exercise, particularly high intensity interval training and resistance training, can increase basal metabolic rate and promote the repackaging of glycogen into fuels for high intensity activity, while also ensuring the proper delivery of fats to tissues that produce hormones like testosterone and estrogen.
01:15:15 Metformin and berberine are two drugs that have similar effects in lowering blood glucose levels, but caution should be taken when using them due to potential side effects and individual dose requirements.
01:21:44 The ketogenic diet has been shown to have a notable decrease on blood glucose levels and has strong support for its role in regulating blood sugar.
01:28:08 Mate, a caffeinated tea, has been shown to increase glucagon-like peptide (GLP1) and leptin levels, acting as an appetite suppressant and providing electrolytes, making it a useful tool for extending the fasting window and regulating blood sugar levels.
01:34:50 Yerba mate can help manage GLP-1, leptin, glucose, and glucagon levels, which can be beneficial for regulating hunger and satiety.

Hormones and Sunlight: Controlling Appetite and Regulating Blood Sugar

How Hormones Control Hunger, Eating & Satiety
by Huberman Lab

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