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When it comes to GHK-Cu vs AHK-Cu, the debate is less about which peptide is better and more so about understanding what each one does and why your skin may need both

The injection provider can administer the B12 shot deep into the muscle (intramuscularly) or into the tissue layer between the skin and the muscle (subcutaneously)

To do that, we recommend speaking with a healthcare provider to ask if youre a good candidate for B12 supplementation, and if so, making sure you choose a B12 supplement with an appropriate dosage thats been third-party tested and meets any other criteria you have

"Oral vitamin B12 versus intramuscular vitamin B12 for vitamin B12 deficiency"

According to a study published in PubMed Central (NIH), IV administration of vitamin B12 provides a faster increase in B12 levels compared to oral supplementation, making it a potentially better option for patients with severe deficiency