01
Vitamin D
Vitamin D appears in nearly every men's multivitamin, which is why it is the first thing to look for. It is generally included because it supports normal bone and muscle function, and because it is hard to get enough of from food alone.
It is commonly paired with calcium and magnesium in a formula. Your body makes some of it from sunlight, which is relevant in a city where most working hours happen indoors. Daily value percentages on the label tell you how much of a typical reference intake the tablet provides. That number is not a limit, and it is not a target.
Common pairing
Calcium & magnesium
Also made from
Daylight on skin