Consuming garlic or onion with cereals increased the uptake of iron by about 70 percent, and zinc by to 160 percent, according to new results published in the Journal of Agricultural and Food Chemistry​ that could offer opportunities to tackle two of the globe's major deficiency concerns.

Does onion increase iron?

The additions of garlic and onion were actually shown to significantly improve iron bioavailability from non-heme iron sources (pulse-and grain-based meals) in an in vitro model, likely because of their sulfur compounds (24) . ...

Does red onion contain iron?

Onions also contain small amounts of: calcium. iron.