It's important to clarify that the substances you mentioned—retinoic acid (reta), IGF-1 LR3, and melanotan II (MT2)—are often used in bodybuilding and aesthetic contexts, but they should be approached with caution due to potential side effects, legal issues, and health risks. Here’s a brief overview of what someone might experience in the first week of using these substances based on anecdotal reports and available information:
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