learn Vitamin D
Vitamin made in the skin from sunlight, also taken as a supplement
- What is the connection between Vitamin D and hair loss? Observational studies link low vitamin D with some types of hair loss, especially alopecia areata, but they have not shown that low vitamin D causes it.
- Can Vitamin D deficiency trigger excessive hair shedding? Observational studies link low vitamin D with some kinds of shedding, but they have not shown that it causes it. A blood test and a doctor can check your level.
- Is it safe to take Vitamin D supplements for hair growth? At normal doses vitamin D is well tolerated by most adults, but high doses can raise blood calcium. It has only been linked to hair in people who are deficient, so ask a doctor about a blood test first.
- All 5 questions on Vitamin D →
