Medically reviewed by Soma Mandal, MD A vitamin D test is a blood test that measures the level of vitamin D (calciferol) in ...

Own-brand vitamin D tablets from pharmacies, discount stores and supermarkets are usually cheapest, and buying larger packs or multi-buy offers (Boots, Superdrug, Holland & Barrett and supermarkets ...

Why increase a person’s risk for melanoma just to improve vitamin D levels, when supplementation is generally simplistic and cost effective? Melanoma kills, and death rates have not decreased ...