Macro partitioning
Replacing 5% of daily energy intake from carbohydrates with polyunsaturated fat (PUFA) significantly improves glucose-insulin homeostasis by lowering HbA1c, fasting insulin, and HOMA-IR, and improving insulin secretion capacity.
To improve your blood sugar control and insulin sensitivity, try swapping 5% of your daily calories from carbohydrates (like bread, rice, or sugar) for polyunsaturated fats (found in vegetable oils, nuts, and fish). This specific swap has been shown to lower HbA1c and improve how your pancreas releases insulin. You don't need to eliminate carbs entirely, but prioritizing PUFA over saturated fats or refined carbs when making swaps yields the best metabolic results.
Replacing carbohydrate with PUFA significantly lowered HbA1c (-0.11%; -0.17, -0.05) and fasting insulin (-1.6 pmol/L; -2.8, -0.4). ... Based on gold-standard acute insulin response in ten trials, PUFA significantly improved insulin secretion capacity (+0.5 pmol/L/min; 0.2, 0.8) whether replacing carbohydrate, SFA, or even MUFA.
Why this rating
Systematic review and meta-analysis of 102 randomized controlled feeding trials with 4,220 adults.
Source
Effects of Saturated Fat, Polyunsaturated Fat, Monounsaturated Fat, and Carbohydrate on Glucose-Insulin Homeostasis: A Systematic Review and Meta-analysis of Randomised Controlled Feeding Trials
Fumiaki Imamura et al. · PLoS Medicine · 2016
DOI 10.1371/journal.pmed.1002087
More from this paper
- Replacing carbohydrates with Saturated Fat (SFA) has no significant effect on fasting glucose, though it may slightly lower fasting insulin.Strong
- Replacing carbohydrates with Monounsaturated Fat (MUFA) lowers HbA1c and HOMA-IR, but does not significantly improve insulin secretion capacity (AIR) compared to PUFA.Strong
Related findings · Macro partitioning
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- Resistance exercise training combined with sufficient dietary protein intake acts synergistically to maximize skeletal muscle hypertrophy, with protein intake saturating around 1.6 g/kg/day for general populations and potentially requiring 2.0-2.2 g/kg/day for resistance-trained individuals.Strong
- Trans fats should be completely eliminated from the diet, as they increase LDL cholesterol, decrease HDL cholesterol, and are directly associated with increased coronary risk.Strong
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