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Which should I start with
Smaller 5 mg format suited to pilot studies, method development, or single-project workflows where smaller quantities are preferred
Maquart FX, Bellon G, Chaqour B, Wegrowski J, Patt L, Trachy RE, Monboisse JC, Chastang F, Birembaut P, Gillery P, et al
After 4-6 weeks of confirmed tolerance, additional products can be introduced gradually
[Analytical Chemistry, 2005, vol
A useful way to frame the difference: tretinoin is a top-down instruction that reprograms the epidermis, whereas GHK-Cu is a bottom-up supply of signal and cofactor that helps the dermis rebuild
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