The book provides lists of snooze-supporting ingredients including “powerhouse” foods that deliver several beneficial compounds. Brown rice, for instance, contains tryptophan, melatonin, vitamin B6, magnesium and zinc, as well as fibre and complex carbohydrates that optimise our tryptophan uptake. Other superfoods include bananas, walnuts and barley. “People can add these to their favourite recipes,” suggests St-Onge, “using barley instead of rice in risotto or adding kale [which contains folate and B6] to soup.”