Many months: There is widespread agreement that it takes many months for vit a to leave the body but little specific info on how long. One website says the half-life is 6 months, meaning it takes 6 mos. For half of it to leave your body, but it does not cite a reference, and i could not find detailed info elsewhere, so the exact answer is a bit of a mystery.
Answered 11/20/2017
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