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Metformin: (Side Effects) First line for Type 2 diabetes (and used in insulin resistance PCOS) most side effects are GI and improve with start low, go slow Common Side Effects (Mostly GI) Common & Rare Side Effects of Vitamin B12 Injections Vitamin B12 Guide: Forms, Dosage, and When to Worry About Too Much What are the Side Effects of Vitamin B12 Injections?
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