Unbiased Science Slow Down Before You Intermittent Fast
Jan 25, 2023
Meghann Featherstun, a board-certified sports dietitian who advises endurance athletes, joins to dissect intermittent fasting. She outlines common IF methods and reviews the clinical evidence. They discuss risks like bingeing, sex-specific harms, adherence problems, and who should avoid fasting. Practical personalization and alternatives for midlife women and athletes are highlighted.
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IF Loses Weight But Not More Than Calorie Cuts
- Large reviews show IF produces mild–moderate short-term weight loss but is not superior to continuous daily calorie restriction.
- A 3–8% weight loss over 8–12 weeks was comparable to traditional calorie-cutting diets.
Evidence For Health Benefits Is Inconclusive
- Reviews and bodies like the National Institute on Aging conclude evidence is insufficient to recommend IF broadly.
- Some studies show benefits for triglycerides, LDL, and insulin resistance, but results are inconsistent and long-term safety is unclear.
Judge IF By Sustainability And Harm
- Treat IF skeptically as a fad if it promises quick fixes or contradicts standard dietary recommendations.
- Evaluate sustainability and mental/physical harms; avoid if it interferes with social life or enjoyment of food.