vitamin d3

Today I took care of a 73 year old man with severe Vitamin D deficiency.   His primary care doctor told him take 2000 IU of Vitamin D3 every day which he did daily since 2011.    Interestingly when I checked all his hormone levels his Vitamin D3 level came back at 11.3 (<30 is deficient and optimal is >60). Here some points that are extremely important for patients to understand: 1. Not all supplement companies produce quality products.   Unfortunately there is not the strict oversight over supplement companies like there is over pharmacies.   As a result many