are b12 injections or tablets better

Neurogan GHK-Cu Hair & Scalp Serum - 4% Copper Peptides 2400mg | For Men & Women, Fast-Absorbing, Water-Based Formula for Hair Softness & Shine, Daily Use, Cosmetic Product, Made in USA https://i.ytimg.com/vi/ie-LETlqpSs/hqdefault.jpg Volume_20ml Vitamin B12 use in the body Vitamin B12 is required for cell metabolism and also the proper working of the brain and nervous system Size:Copper Peptide Bundle ( 1 gram GHK+ 1 gram AHK)

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