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The blend fixes the ratio: You dose both peptides at once in whatever proportion the vial was made to there is no way to titrate one independently of the other

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Product Overview Regen BPC-157 is a high-purity synthetic pentadecapeptide widely referenced in scientific literature for use in controlled laboratory environments

BPC-157: Gastric Pentadecapeptide BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide (15 amino acids, sequence: GEPPPGKPADDAGLV) derived from a human gastric protein

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And some never achieve consistent enough absorption for meaningful results