Vitamin D: Cod liver oil

How eating it helps: If you're feeling blue, increasing Vitamin D could help ward off depression. Consuming the mood-regulating vitamin is important, especially during the wintertime when light from the sun (a natural producer of Vitamin D) is limited. RDA: 600 IU per day for adults ages 15 to 60. (IU, or international unit, is a type of measurement typically reserved for vitamins A, C, D and E.)Cod liver oil (1 tablespoon): 1,360 IU
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