Quote:

---

Vitamin D is often referred to as the "sunshine vitamin". That is because the human body can make vitamin D from casual sun exposure of short duration (as little as 5 to 15 minutes of sunshine per day, 2 to 3 times per week on the face and hands). Vitamin D is a fat-soluble vitamin that is stored in body fat. In general, adults (up to age 70) and children living in New York State can get enough casual sun exposure from March to October to store a significant amount of vitamin D. It can later be released for the body's use during the winter months.

There are factors, however, that limit the body's ability to make vitamin D from sun exposure. Some of these factors include the use of sunscreen and/or sun-protective clothing, cloudy northern climate, and window glass that blocks the sun. In addition, with aging (in senior adults over age 70), the ability to make vitamin D from sunlight exposure is greatly reduced.

---