This is like car maintenance, but for your body. Below are youtube articles related to Vitamin-D and how it is important every day. Vitamin-D is free, it is created by exposure to UV-B light (sunlight), but in the winter months away from the equator, there is not enough UV-B light to create vitamin-D3 in the body and hence there is medical recommendations to take vitamin-D3 in Winter. However, since the major problem with very low vitamin-d is the disease Rickets, low to mid levels can give rise to osteoporosis, most of these recommendations give the supplement levels of 400IU or 10mg of Vitamin-D3. The articles below show evidence that this raises the level to “low”. Enough of me, have a look and review for yourself.
Here are some links that will help with this:
Robert P. Heaney, MD “Vitamin D Sunshine Optimal Health: Putting it all Together”
From Dr John Cambell:
From Ivor Cummins BE(Chem), CEng MIEI “D is for Debacle – The Crucial Story of Vitamin D and Human Health”:
From Bruce W Hollis PhD “Results of a Prostate Cancer/Vitamin D Trial: Effectiveness Safety Recommendations”: