Frontiers in Nutrition, Vol 8 (2021) Frontiers in Nutrition Frontiers in nutrition Frontiers in nutrition, Frontiers media, 2021, 8, ⟨10.3389/fnut.2021.644320⟩ Frontiers in nutrition, 2021, 8, ⟨10.3389/fnut.2021.644320⟩ Frontiers in Nutrition, 8:644320. Frontiers Media S.A.