Why Health Experts Are Quitting Fasting (BV #32) — Key Takeaways

YouTube
Why Health Experts Are Quitting Fasting (BV #32)
Jay Feldman Wellness1h 18mSep 3, 2026
Watch the originalSkip daily 16:8 fasting entirely — even 4 days of intermittent fasting measurably shifts cortisol rhythm and suppresses T3 by up to 55% within 24 hours, and Thomas DeLauer's proposed fix (fewer but longer 20–22 hour fasts) produces the same hormonal damage per the studies he himself cites.
Key takeaways
Just 4 days of intermittent fasting shifts cortisol rhythm — not years as influencers claim
Just 4 days of intermittent fasting shifts cortisol rhythm — not years as influencers claim
- Frontiers in Nutrition: even a single fasting day increases cortisol rhythm amplitude
- Endocrinology study: IF powerfully increases cortisol secretion AND alters circadian cortisol timing within days
A 24-hour fast drops active thyroid hormone T3 by 55% within that single day
A 24-hour fast drops active thyroid hormone T3 by 55% within that single day
- T3 suppression is adaptive — body lowers metabolic rate when fuel is scarce
- Alternate-day fasting studies lasting 6+ months still show persistently low T3, disproving adaptation claims
Clearing fatty acid metabolites (ceramides, diglycerides) from muscle and liver reverses insulin resistance regardless of method
Clearing fatty acid metabolites (ceramides, diglycerides) from muscle and liver reverses insulin resistance regardless of method
- Pancreatic fat clearance alone can put type 2 diabetes into complete remission if beta cells haven't fully declined
- Exercise, caloric restriction, fasting, and medication all improve insulin sensitivity via the same mechanism — removing ectopic lipid
This Dig holds 4 more insights, 4 flashcards, and 3 quotes — free with your trial.
Unlock this Dig freeStart free with 100 credits · No card, no expiry
In this video
- 1mintro
- 2mThomas Delauer admits that intermittent fasting increases cortisol
- 10mwhat fasting does to your digestion, thyroid, hormones, and metabolism
- 16mwhy intermittent fasting is stressful and increases cortisol
- 20mThomas Delauer says intermittent fasting every day is harmful
- 28mthe consequences of long-term intermittent fasting
- 32mmore fat-burning doesn’t mean better health
- 36mThomas DeLauer’s new approach to fasting: does it actually make sense?
- 41mshould we try to increase autophagy for better health?
- 46mare longer fasts better than daily intermittent fasting? do they improve insulin sensitivity?
- 53mthe best way to increase autophagy
- 1h 5mwhat to do if fasting makes you feel better
- 1h 15mrestoring health and finding balance after vegan, OMAD, and carnivore diets
“If you're frail by the time you get to 50, 60, 70 years old, I don't think the autophagy is going to matter anymore.”
— Mike Fave
This page is a partial, transformative summary produced by Homestake. All rights to the original content remain with its creator — please support them at the source link above.



