Global diet and health: old questions, fresh evidence, and new horizons

Few, if any, would contest that diet and nutrition have a crucial and substantial impact on human health. But the devil is in the details. Common questions include: is there such a thing as an optimal diet? What is suboptimal? Which dietary components matter most? And given the necessity to take action on climate change and planetary health, what should the world eat?1Willett W Rockström J Loken B et al.Food in the Anthropocene: the EAT–Lancet...