The one most likely to be low
Vitamin D and the sunlight question
Vitamin D is the one most likely to be low in people who work indoors. In Indonesia there is plenty of sun, yet long office hours and covered transport mean many adults get little direct exposure. It supports calcium absorption and normal muscle function.
Doses in men's products vary widely, so check how much one serving provides and whether you already get it from another supplement. If two bottles each carry a full daily amount, you are not getting the benefit twice — you are simply doubling one number.
A sunlit country is not the same thing as a sunlit day. The dose on the label is what you actually swallow.