Eat mostly vegan, plus a little fish, limiting meals with fish to a maximum of two or three times per week. Choose fish, crustaceans, and mollusks with a high omega-3, omega-6, and vitamin B12 content (salmon, anchovies, sardines, cod, sea bream, trout, clams, shrimp; see appendix B). Pay attention to the quality of the fish, choosing those with low levels of mercury.
