Vitamin D (25-hydroxyvitamin D) is actually not an essential dietary vitamin as it can be...
Category - Vitamin D
Vitamin D is actually not an essential dietary vitamin as it can be synthesized in adequate amounts by most mammals exposed to sunlight. The body makes vitamin D when the skin is directly exposed to the sun. Some is suggesting an association of vitamin D [25-hydroxyvitamin D] with testosterone levels in men. Vitamine D deficit is associated with muscle weakness, whereas vitamin D supplementation may improve muscle function.