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Why did the lower dose work better than the higher dose

These include: Individuals with pernicious anemia , a condition that causes their bodies to be unable to adequately absorb vitamin B12

Oral Investig

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doi: 10.1016/0022-510X(86)90167-X

If this happens, its not uncommon for a person to become convinced that vitamin A is a poison, leading them toward total vitamin A avoidance, eventually making them sick in the opposite direction. Unless youre a recovering vegan, get plenty of sun exposure year-round, have a high metabolic rate, and maybe cant absorb fats well, you probably do not need cod liver oil, daily beef liver capsules, or any other sort of supplemental vitamin A