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Some users combine systemic peptides with topical GHK-Cu applied directly to scalp lesions
Individual factors such as metabolic rate, body weight, and age may theoretically influence how B12 is distributed and utilised, though evidence for their impact on injection intervals is limited
Gou, Y., et al
Do not exceed recommended dosage
In older people, there may not be sufficient stomach acid to start the breakdown process
You can read more in our guide on how long it takes for B12 injections to work
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