As a result of another thread, I started thinking about vitamin D, calcium and osteoporosis. So can someone tell me: Does vitamin have any other function than helping to absorb calcium? If your skin doctor tells you to always use SPF 30 when going out in the sun, should he be talking to your bone doctor, who might give different advice? If I spend two weeks soaking up rays in Barbados every winter (well, I do use sunblock, but mainly on my shoulders and bald pate, where the sun is constant and perpendicular to the surface), will this protect me from osteoporosis all year? I do a fair amount of gardening all summer too and eat a lot of dairy (mostly yoghurt and cheese).
From H. Deluca’s website:
l,25-(OH)2D3 is shorthand for the metabolite of vitamin D: 1-alpha, 25 dihydroxy vitamin D3.
Hormones generally seem to regulate more than just the one or two things that they are known for. Which makes sense since you need to carry a copy of every receptor gene around in every cell of the body.