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Erovic et al

The incubation period is less than 48 hours

Conditions That Increase Injection Site Discomfort Higher concentrations: At higher concentrations of GHK-Cu, the concentration of positively charged GHK-Cu molecules at the injection site increases, amplifying the localised pH disturbance and the associated discomfort

Your brain is protected by a blood-brain barrier that can protect the brain from toxins

Difficulty walking When it is severe, a B12 deficiency can affect balance

While this does not necessarily mean that a vitamin deficiency directly causes low testosterone, it does suggest a connection between nutrients and hormone health