Disease is also something that can block absorption which I feel a lot of people overlook. If you are vitamin D deficient, that may not be just because you don'

Disease is also something that can block absorption which I feel a lot of people overlook. If you are vitamin D deficient, that may not be just because you don't get enough sun or need to take pills. This could be a sign of a kidney problem. If you are magnesium deficient, maybe it is a sign of a kidney problem. If you are B12 deficient, maybe it is a sign of a kidney problem. If you have a normal diet and you have deficiencies, don't just look to supplements.