HUBERMAN: Now, if you start combining different peptides together, you get what's called polypeptides
Reviewed by Pieter Cohen, MD, Contributor Peptides are getting a lot of attention on social media, purporting to support everything from muscle growth and skin health to improved energy, cognitive function, and sleep quality
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Available online at: (Accessed October 16, 2026)
Beyond POTS, autonomic dysfunction in long COVID can present as: Dysregulated sweating Impaired gastrointestinal muscle contractions, causing constipation, pain, nausea, or weight loss Temperature dysregulation An exaggerated fight-or-flight response The vagus nerve within this systemthe primary parasympathetic nerve connecting the brain to the gut, heart, and lungsappears to be particularly vulnerable to COVID-19-related damage, with implications for heart rate variability, gut function, and the inflammatory regulatory role the vagus nerve normally performs
This is a game-changer for metabolic health, as research shows that this process can increase NAD+ levels in fat cells, supporting more efficient energy use and fat oxidation