Onion
71as eaten · per 100 g: 38 kcal · 0.9 g protein · 1.7 g fiber
a satiety booster. Exceptional fullness per calorie — but at only 38 kcal per 100 g, it can't fill you up on its own. Its power is making a meal bigger and more filling at almost no calorie cost; pair it with protein.
satiety per calorie · 0–100 · not a virtue scale
Compare Onion with another food →
Why this score
The first three bars are sub-scores (0–100 per lever) that build the score; the values under each label are the measured quantities that drive them. Hyper-palatability works the other way — it cuts the built score by the shown percentage (up to −80%). Full math here.
The numbers
| Energy | 38 kcal |
| Protein | 0.9 g |
| Fat | 0.1 g |
| Carbohydrate | 8.5 g |
| …of which sugars | 5.8 g |
| Fiber | 1.7 g |
| Sodium | 1 mg |
Per 100 g. Source: usda-survey-fndds #2709795 — listed by USDA as “Onions, raw”. Every number is traceable, every score recomputable. How the score works.