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Are you Jason Fung? Claim this pageCanadian nephrologist and author of the international bestsellers The Obesity Code and The Complete Guide to Fasting. Co-founder of The Fasting Method, he reframed obesity and type 2 diabetes as hormonal — driven by insulin — rather than a simple matter of calories.
Therapeutic fasting paired with a low-refined-carbohydrate, whole-food diet: intermittent fasting schedules from 16:8 up to longer supervised fasts, cutting sugar and refined grains to lower insulin, keeping protein moderate, and using the eating window — not just the food — as the lever. He treats when you eat as being as important as what.
Lower insulin to lose fat and reverse type 2 diabetes: treat the hormonal driver instead of counting calories, and use fasting as a deliberate, structured clinical tool with clear contraindications.
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160+ lab tests twice a year, tracked for life at $365
Function runs 160+ biomarkers annually (tested twice per year) across hormones, heart, metabolic, aging, and autoimmunity markers—including insulin, lipoproteins, hs-CRP, homocysteine, vitamin D, and heavy metals. Results are reviewed by clinicians and flagged for action. No insurance required, HSA/FSA eligible. The longevity crowd's baseline-tracking service.
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