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In fact, low B12 levels can cause discolouration of nails, brittle hair, dry lips and mouth and even hyperpigmentation

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The comparison below is about mechanism and evidence maturity, not a treatment recommendation

For example, as a whole, peptide therapy grew in year-over-year popularity by 281% on Google, 459% on TikTok and 412% on Instagram as of early April of this year, according to Alyssa Williams Atkinson, category insights manager at Spate market research