where is the b12 injection given Treating Severe Vitamin Deficiency B12 Injection Dosage and Frequency:

Vitamin B12 deficiency in infants with axial hypotonia and psychomotor regression: Insights from a Moroccan case study

The FDA has categorized AOD 9604 peptides as a Generally Recognized As Safe (GRAS) peptide treatment

Sufficient B12 levels contribute to skin repair and regeneration, strengthen nails, and promote hair health, improving overall appearance and vitality

8 weeks: ~3 vials 12 weeks: ~6 vials 16 weeks: ~8 vials Insulin Syringes (U-100, 1 mL) Per injection: 1 syringe 8 weeks: ~56 syringes 12 weeks: ~84 syringes 16 weeks: ~112 syringes Bacteriostatic Water (30 mL bottle) Use 3.0 mL per 12 mg vial for reconstitution

Since supplements aren't strictly regulated by the FDA in the same way medications are, look for brands that use third-party testing (like USP or NSF certification)