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Peptides are not recommended for individuals with certain medical conditions, pregnant or breastfeeding women
A deficiency can cause tingling, numbness, and balance problems
FAQs Do B12 injections need a prescription in the UK
High doses of B12, often used to treat deficiencies, may cause side effects such as headaches, nausea, diarrhea, fatigue or weakness, and tingling in the hands and feet
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