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Vitamin S4 is code for SARM, or SARMs (Selective Androgen Receptor Modulators). SARMs are stuff that helps you build muscle and while you use SARMs for 30 days, you add a high dose of Enclomiphene daily as a test base to help prevent gyno. Then you take a 4 to 6 week break and take Enclomiphene for the first 2 weeks. It's post cycle therapy.
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