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10.1242/dev.065870 15 GongJ.WangX.ZhuC.DongX.ZhangQ.WangX.et al (2017)

Some patients may notice symptoms returning before their next scheduled injection, particularly if they have higher metabolic demands or ongoing neurological involvement

No bacteriostatic water contains 0.9% benzyl alcohol as a preservative that inhibits bacterial growth in multi-dose vials, while sterile water for injection contains no preservatives and must be discarded after single use

doi: 10.1073/pnas.1604285113

Theres little research behind those claims and most peptides have not been reviewed for safety by the FDA

BPC-157 given during reperfusion counteracted early (24-hour) and delayed (72-hour) neuronal damage