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Disclosure of interest: Lupei Cai: nothing to disclose

efficacy pathways respond to cumulative exposure over time

Anabolic-androgenic steroids work by binding directly to androgen receptors, producing androgenic effects alongside anabolic ones
Although I take a daily multivitamin, I do not take a B12 supplement
How it works: Epitalon is a synthetic version of epithalamin, a substance from the pineal gland studied by Russian gerontologist Vladimir Khavinson

For real deficiency correction, injections remain the more reliable treatment