Onions have a low iron content.

Are onions rich in iron?

Onions are poor in iron. The onion root contains up to 0.28 mg of iron per 100g. Onion greens have a much higher iron content, though.

Onions are rich in fiber.

Are onions high in fiber?

Onions are excellent dietary sources of fiber. Red onions have the highest fiber content, though. White & yellow onions contain less fiber.