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Strict vegans and vegetarians are also at higher risk for deficiency since B12 occurs naturally only in animal-derived foods
[17] These effects, if they occur, tend to resolve within a short time
Vitamin B12 injections are typically used to treat a deficiency in people who are unable to absorb adequate amounts of B12
Avoid applying strong vitamin C products, high-concentration retinoids, or low-pH chemical exfoliants at the same time as AHK-Cu
Use it immediately, discard what's left
& Herrmann, W
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