The Sugar Diet/Honey Diet and FGF21: The Research (EB # 133) — Key Takeaways
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The Sugar Diet/Honey Diet and FGF21: The Research (EB # 133)
Jay Feldman Wellness1h 33mMay 20, 2025
Watch the originalAdding glycine (from collagen, gelatin, bone broth, or supplements) to a normal diet achieves the same lifespan-extension benefit attributed to FGF21 without the muscle loss, bone loss, and infertility caused by protein restriction.
Key takeaways
FGF21 drives muscle atrophy: removing it prevents 15-25% fasting muscle loss
FGF21 drives muscle atrophy: removing it prevents 15-25% fasting muscle loss
- Fasted mice lost 15-25% muscle mass; FGF21 knockout mice were significantly protected, with protein synthesis unchanged vs. 70% reduction in controls.
- FGF21 overexpression alone in muscle was sufficient to induce 15% muscle loss via autophagy — no fasting required.
Carbohydrate-driven FGF21 requires liver fat production — they are directly correlated
Carbohydrate-driven FGF21 requires liver fat production — they are directly correlated
- Serum FGF21 correlates linearly with de novo lipogenesis rates in humans measured by stable isotope tracers.
- FGF21 knockout mice on high-fructose diet showed 50% less fat production, 30% less VLDL, and 25% less liver fat than controls.
Chronic FGF21 overexpression extends mouse lifespan 36% but causes infertility and bone loss
Chronic FGF21 overexpression extends mouse lifespan 36% but causes infertility and bone loss
- Mice with lifelong FGF21 overexpression were stunted, infertile (females), and had significant bone loss alongside the lifespan gain.
- FGF21 suppresses the growth hormone/IGF-1 axis in the liver — the same mechanism that impairs reproduction and skeletal development.
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In this video
- 1mintro
- 1mthe sugar diet, honey diet, fairy princess diet, and fruit-till-noon diets as discussed by Cole Robinson, Mark Bell, Anabology, Noah Ryan, celestialbe1ng, and others
- 7mmy experience on a high-sugar diet and what the sugar diet means for the health world
- 11mwhat is FGF21?
- 16mhow low-protein diets trigger the release of FGF21
- 20mthe context of FGF21 on low-protein diets and the reasons for its effects: is this really beneficial?
- 26mthe long-term effects of FGF21 on body fat, muscle mass, and metabolic health
- 33mhow the sugar diet compares to low-carb diets
- 36mhigh-carb low-protein diets vs. high-fat low-protein diets on FGF21
- 38mlow-protein diets increase your metabolism due to stress: brown fat, uncoupling, and energy expenditure
- 44mFGF21’s role in stress, energy conservation, and hibernation
- 50mFGF21 and cortisol: is FGF21 a stress hormone?
- 54mFGF21 and hormesis: is FGF21 hormetic?
- 56mFGF21 and liver fat production go hand-in-hand
- 59mcarb-induced increase in FGF21 is activated by reductive stress
- 1h 5mthe role of FGF21 in de novo lipogenesis as an adaptive response to stress
- 1h 11mcarb-induced FGF21 causes fat gain and sympathetic activity
- 1h 14mdoes FGF21 cause metabolic syndrome, diabetes, NAFLD, cardiovascular disease, and obesity?
- 1h 21mdoes FGF21 extend lifespan? if so, is it worth it?
- 1h 27mcan you lose weight and extend lifespan without a protein-deficient diet?
“FGF21 is required for fasting-induced muscle atrophy and weakness.”
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