A method for the treatment or prophylaxis of depressed mood is described, for subjects with increased MAO-A levels, subjects prone to excessive crying, or beyond 5-days postpartum. The subject is administered an antioxidant source on at least the first day of a 3 to 5 day regime； a tryptophan composition on the evening of the penultimate treatment day, simultaneously or following the antioxidant source； and a tyrosine composition the day after the tryptophan composition, on the final treatment day. The antioxidant source may comprise blueberries or another anthocyanin-containing fruit, vegetable, nut, legume, or a juice or extract thereof. Individuals with depressed mood due to perimenopause, due to an alcohol use disorder or withdrawal therefrom, or who are in a postpartum period up to or beyond 18-months, may benefit from the treatment regime. The described method can reduce the likelihood of advancing from depressed mood to postpartum depression in the postpartum period.
