Vitamin A & Osteoporosis
They don't know how, but scientists have found out that too much vitamin A can cause osteoporosis. Also, analysis shows that, in deer antlers, significant amounts of Vitamin A
(retinol) are found in tissues at all stages of differentiation. (4) The fact that excessive vitamin A has both differentiating and deteriorial effects on osteoblasts, and that it promotes osteoporosis, supports my theory that osteoporosis is caused by accelerating the aging of osteoblasts
SourcesAbstracts of most sources can be found at the National Library of Medicine ;
(1) Kawahara TN, et al, Short-term vitamin A supplementation does not affect bone turnover in men. J Nutr 2002 Jun;132(6):1169-72 (4)
Allen SP, et al, A role for retinoic acid in regulating the regeneration of deer antlers. Dev Biol 2002 Nov 15;251(2):409-23.
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Excessive Calcium Causes Osteoporosis
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