Hazelnuts
Mostly monounsaturated fat with fiber and some protein; the available carbohydrate is too small to move insulin much.
FatTonic Facts
Hazelnuts · per serving 1 oz (28g)
Excellent · strongly supports fat-burning
| Factor | Amount | Points |
|---|---|---|
| Start | 100.0 | |
| Glycemic load | 0 | 0.0 |
| Sugar (g) | 1 | −0.8 |
| Processing | whole | 0.0 |
| Fiber (g) | 3 | +4.8 |
| Protein (g) | 4 | +2.8 |
| Capped at 100 | raw 106.8 | = 100 |
| Glycemic index | not tested | |
| Carbs (g) | 5 | |
| Fat (g) | 17 |
Score model v1
Nutrients: USDA FoodData Central, record 170581 (Nuts, hazelnuts or filberts), public domain, checked 2 Oct 2026.
Glycemic index: not tested — too little carbohydrate to test (University of Sydney GI FAQ); the score assumes 0.
Per 100 g (USDA record; serving 28 g): carbs 16.7, sugar 4.3, fiber 9.7, protein 15, fat 60.8 g.
What this means for fat-burning
Why this score: fiber 3 g set it, +4.8 points. Source: USDA FoodData Central, FDC 170581.
See how your whole day scores — free Metabolic Score →This food and 199 more, scored on your phone.
Among the 200 rated foods
Hazelnuts scores 100, rated Excellent. It scores higher than 75% of the 200 rated foods.
Rated foods per band: Avoid 0–19: 11; Poor 20–39: 23; Moderate 40–59: 34; Good 60–79: 45; Excellent 80–100: 87.
Frequently asked questions
Does hazelnuts spike insulin?
Glycemic load 0 for 1 oz (28g); FatTonic Score 100/100 — it strongly supports fat-burning.
Is hazelnuts good for fat loss?
Excellent (100/100): hazelnuts strongly supports fat-burning.
Better in nuts & seeds
Hazelnuts ties for the best in nuts & seeds on this index.