Nutrition
Dr. Jason Fung
- 70% Trust Score
- 832 claims analyzed
- 2.5 followers
- 395 verified · 400 questionable · 37 debunked
Is Dr. Jason Fung trustworthy?
Dr. Jason Fung has a Verify Influencers Trust Score of 70 out of 100, which we classify as generally reliable. Of the 832 health claims we analyzed, 395 are verified by peer-reviewed research, 400 are questionable, and 37 are debunked.
Dr. Jason Fung's most repeated claims
- Questionable (67/100) — A pinch of salt under the tongue or salt in water can quickly resolve headaches and dizziness caused by electrolyte depletion during a fast. (Nutrition & Diet) source
- Questionable (48/100) — Basal metabolic rate (BMR) does not decrease during fasting; in fact, a 4-day water-only fast can increase resting energy expenditure by approximately 10%. (Hormones & Metabolism) source
- Questionable (65/100) — Fasting for 4 days does not slow down the metabolic rate; instead, it can increase resting energy expenditure by approximately 10% due to the rise in noradrenaline. (Hormones & Metabolism) source
- Verified (72/100) — Dry fasting (abstaining from both food and water) should be limited to 16 to 18 hours maximum to avoid the risks of severe dehydration. (Nutrition & Diet) source
- Verified (76/100) — Fasting is not recommended for children, pregnant women, or breastfeeding mothers due to the high nutrient requirements for growth and development. (Nutrition & Diet) source
- Verified (75/100) — Fasting stimulates the production of Brain-Derived Neurotrophic Factor (BDNF), a hormone that acts like 'fertilizer' for the brain, increasing neuroplasticity and neurogenesis. (Mental Health & Cognitive) source
- Verified (83/100) — Five nights of sleep restriction (sleeping only 4-6 hours) leads to a 20% greater output of insulin, which promotes fat storage. (Sleep & Recovery) source
- Verified (77/100) — Consuming 2 tablespoons of apple cider vinegar at bedtime can help moderate waking glucose concentrations in type 2 diabetic patients, though the effect is relatively small. (Nutrition & Diet) source
- Verified (76/100) — The 'overflow paradigm' explains that insulin resistance is not a 'lock and key' failure but a cell that is already too full of glucose, like an overstuffed suitcase. (Hormones & Metabolism) source
- Verified (70/100) — Fasting activates the sympathetic nervous system, making the body hyper-vigilant and energetic rather than tired. (Hormones & Metabolism) source
Verified claims
- Verified (72/100) — Dry fasting (abstaining from both food and water) should be limited to 16 to 18 hours maximum to avoid the risks of severe dehydration. (Nutrition & Diet) source
- Verified (76/100) — Fasting is not recommended for children, pregnant women, or breastfeeding mothers due to the high nutrient requirements for growth and development. (Nutrition & Diet) source
- Verified (75/100) — Fasting stimulates the production of Brain-Derived Neurotrophic Factor (BDNF), a hormone that acts like 'fertilizer' for the brain, increasing neuroplasticity and neurogenesis. (Mental Health & Cognitive) source
- Verified (83/100) — Five nights of sleep restriction (sleeping only 4-6 hours) leads to a 20% greater output of insulin, which promotes fat storage. (Sleep & Recovery) source
- Verified (77/100) — Consuming 2 tablespoons of apple cider vinegar at bedtime can help moderate waking glucose concentrations in type 2 diabetic patients, though the effect is relatively small. (Nutrition & Diet) source
Debunked claims
- Debunked (39/100) — A 36-hour fast performed three times per week is a specific therapeutic protocol used to reverse Type 2 diabetes and achieve significant metabolic reset. (Hormones & Metabolism) source
- Debunked (27/100) — Dr. Fung has observed that his patients who lose large amounts of weight through fasting rarely require skin removal surgery because autophagy recycles the excess skin protein. (Weight Management) source
- Debunked (36/100) — If you experience fasting-induced insomnia, only go to sleep when you are actually tired, even if it means sleeping as little as 3 hours; you will often remain fully alert due to increased energy levels. (Sleep & Recovery) source
- Debunked (17/100) — Fasting increases blood levels of free fatty acids like linoleic acid, which can bind to the COVID-19 spike protein and decrease its affinity for the ACE2 receptor, potentially making the virus less infectious. (Nutrition & Diet) source
- Debunked (29/100) — For those with severe insulin resistance, a 36-hour fast (e.g., finishing dinner on Sunday and not eating until breakfast on Tuesday) is more effective for skin health than shorter fasts. (Skin & Beauty) source
Frequently asked questions
- What is Dr. Jason Fung's trust score?
- Dr. Jason Fung has a Verify Influencers trust score of 70 out of 100, based on analysis of 832 health claims against peer-reviewed scientific research.
- Is Dr. Jason Fung trustworthy for health advice?
- Dr. Jason Fung has a Verify Influencers Trust Score of 70 out of 100, which we classify as generally reliable. Of the 832 health claims we analyzed, 395 are verified by peer-reviewed research, 400 are questionable, and 37 are debunked.
- How many claims has Dr. Jason Fung made?
- We have analyzed 832 health claims from Dr. Jason Fung across YouTube, social media, podcasts, and their website.
Scores follow a fixed rubric and are re-checked on a rolling cycle. How we score and how to request a correction. Last updated 2026-05-16.
See all scored influencers