Research
Macro partitioning
A single day of an isocaloric high-fat diet (74% fat, 11% carbs) significantly improves insulin sensitivity and lowers postprandial glucose and insulin levels compared to high-carbohydrate or control diets in healthy young men.
For healthy individuals, switching to a high-fat, low-carbohydrate diet for a single day can improve insulin sensitivity and reduce blood sugar spikes compared to high-carb or standard balanced diets, provided total calories remain constant.
GoodSupportsHIGH confidence
F+ diet improved insulin resistance, lowering Homeostatis Model Assessment Insulin Resistance (HOMA-IR) values... Postprandial glucose and insulin levels were lowest in F+ over the 24 h.
Why this rating
Randomized crossover design with strict controls, but small sample size (n=19) and short duration (24h).
Source
Short-term high-fat and high-carb diet effects on glucose metabolism and hedonic regulation in young healthy men
Marcel Pointke et al. · Frontiers in Nutrition · 2024
DOI 10.3389/fnut.2024.1469230
crossover · n=19Cited 2×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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