There are 3 ways for adults to ensure adequate levels of vitamin D:
- regularly receive midday sun exposure in the late spring, summer, and early fall, exposing as much of the skin as possible (being careful to never burn).
- regular use of a sun bed (avoiding sunburn) during the colder months.
- take 5,000 I.U. per day for 2-3 months, then obtain a 25-hydroxyvitamin D test. Adjust your dosage so that blood levels are between 50-80 ng/ml. year round.