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For the 10mg blend (5mg BPC-157 + 5mg TB-500), 2mL of bacteriostatic water gives 2.5mg/mL of each peptide

This causes the rate of the GS reaction to come back down to normal despite the upregulation of CBS and GCS and cause the steady concentrations of cytosolic GSH and the blood concentrations of GSH and cysteine to decline below normal

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But understanding that they exist explains why pharmaceutical-grade pre-filled products sometimes have longer shelf lives than researcher-reconstituted versions of the same peptide

Sterile water only lasts 24 hours