All poultry meats- chicken, turkey and ham – contain tryptophan. There’s a funny myth that turkey contains the most, probably because so many people fall asleep after Christmas dinner.

Technically, Goose and Duck have the highest content, but we reckon they’re a bit fatty, meaning they’ll sit in your stomach, making you feel uncomfortable before bed. Next up is chicken, which wrapped up with some salad, or thinly sliced on wholemeal bread or crackers would go down a treat.

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