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One unverified lot can wreck a study. Inconsistent purity, mystery impurities, unknown concentrations — every researcher who's been burned knows the cost. Every batch we ship comes with a third-party Vanguard Laboratory COA confirming 99% HPLC purity. No mystery. No "trust us." Just documented purity, every time. Up to 50% off all peptides — and the COA is always included. 🇺🇸 Made in USA. For Research Use Only.