Ninety percent of the vitamin D in your body is a result of your skin’s exposure to ultraviolet light. This makes vitamin D one of the only vitamins you don’t really have to pay for. The other 10 percent can come from a supplement or certain foods, but really a 15-minute walk is more beneficial than either of these things.
Although this is the exact opposite of what skin cancer warnings tell us, limiting that exposure to 10 to 15 minutes will keep you safe and full of vitamin D. It is a soluble fat, which means it is stored and dissolved in body fat rather than water soluble, which is not stored. Vitamin D stays in your body for months and that means taking the 15-minute walk in the sunshine will provide you with the beneficial affects of vitamin D for months to come.
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