High doses of vitamin B12, such as those found in Nature's Bounty B12 1500 mcg Time Release, are generally considered safe for most people due to the water-soluble nature of B12, allowing excess amounts to be excreted in urine. However, some research indicates that extremely high B12 levels might be linked to negative health effects, particularly impacting kidney function in individuals with pre-existing kidney conditions. Therefore, it's crucial to consult with a healthcare provider before taking high doses of any supplement.
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