Comments by "bighand69" (@bighands69) on "Vitamin D, blood levels" video.

It depends on his levels to be honest. 400IU may be too high or too low. And his age also plays a factor it. His best source of vitamin d is from the sun and being out doors.
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@kkarllwt Those 5 months of the year can actually be enough for the rest of the year. If a person has a outdoor life style in summer they will be getting hundreds of thousands of units of vitamin d per day. So when it does come to Oct they will have enough residual levels of vitamin do that it can sustain them through that period. There is still vitamin d to be had in winter but it is a low level but with the large production in Spring, summer and Fall it can be enough. This spring the outdoor lifestyle needs to be adapted. I do swimming, running, walking and work out doors most of the year and there is one month were it is not really possible so I rely on year round exposure. Diet also helps with this as well.
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