Melatonin is also found in a variety of foods, although typically in small amounts.[1] Sources of melatonin that are commonly consumed include:[2][3]
- Tomatoes:3–114 nanograms per gram (ng/g)[4][5]
- Walnuts: 3–4 ng/g[6]
- Cereal (barley, rye): 300–1,000 picograms per gram (pg/g)[1]
- Strawberries: 1–11 ng/g[4]
- Night-time milk (functional food product): 10–40 nanograms per milliliter (ng/ml)[7]
- Wine (from grapes): 50–230 picograms per milliliter (pg/ml)[4][8]
- Beer (from hops): 52–170 pg/ml[9]
- Cherries: 2.06–13.46 ng/g[10]