is the b12 injection good Shot: What Every Human Needs to Know About Injectable Vitamin B12 B12 Shots for Weight Loss:

The blue color comes from copper ions, and excessive copper exposure could potentially cause irritation or other issues

[DOI] [PMC free article] [PubMed] [Google Scholar] 49.Cheyssac C, Lecoeur C, Dechaume A, et al

Electrolyte imbalance with excessive use or poor hydration

Note: Oral use only

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If anything, the improved B-vitamin status might increase your appetite or how your body processes foods efficiently