Is Onion good for you?
Onion is a vegetable. It has about 8 g net carbs and 1.1 g protein per 100 g. Here's how Susta judges it — and why the answer changes with your goal.
Onion: verdict by goal
The details
Blood sugar: Higher-sugar than leafy veg but used in small aromatic amounts — no real glucose concern at cooking quantities.
How to choose: Firm, dry papery skin.
How to use it: Aromatic base for nearly everything.
How to store: Cool, dark, dry.
Sensible portion: aromatic amount, daily
See how Onion fits your goal
Susta judges every food for your specific health goal — free, on-device, with the cited evidence behind it.
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Susta gives general wellness information graded by evidence — not medical advice, diagnosis, or treatment, and never medication advice. Verdicts are tuned to a chosen goal and may differ for you. Talk to your clinician about your health.