Onions

What it does

Quercetin is one of the most-studied plant antioxidants; concentrated near the skin.

• Quercetin flavonoids

Where the number comes from

Onions sits in the veg group of the Fadnes model, the only peer-reviewed model that converts eating into years of life. The lifetime gain for that group is spread across the days you actually eat it — a daily serving from age 20 to 80 — which gives +8 min per serving. The authors rate the evidence behind this group as low.

What it is made of

• Quercetin
• Sulphur compounds

How to eat it

Peel thin — the good stuff is near the skin.

Minutes derived from Fadnes LT, Økland J-M, Haaland ØA, Johansson KA. Estimating impact of food choices on life expectancy: A modeling study. PLOS Medicine 19(2):e1003889, 2022. doi:10.1371/journal.pmed.1003889