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Description
Besides low serum vitamin B12, elevated methylmalonic acid (MMA) is often seen with B12 deficiency

Hang on to those vitamins But although the study found a possible link, it did not prove that too much vitamin B12 definitely causes or worsens acne
But here's the thing - not everyone gets enough B12, and even fewer people absorb it properly

Qiu W, Gobinath A, Wen Y, Austin J, Galea LAM

Mild deficiency typically requires monthly injections

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