Just wanted to pass on that large doses of vitamin A have an adverse effect on bone density and promotes osteoporosis. I just learned this from uptodate.com medical website. I know some here take Vit A for various reasons, however, do it in moderation in order to avoid bone problems.
Vitamin A and synthetic retinoids —
Vitamin A excess intake appears to increase the risk of hip fracture in women. The mechanism by which this may occur counteracs the ability of
vitamin D to maintain normal serum calcium concentrations, thereby leading to accelerated bone resorption and fractures. ].
The current recommended intake of
vitamin A is 5000 U/day,avoid supplements with >5000 units of vitamin A per day.
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