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Like, it might be fine in rats and mice, but its toxic in people. A 2025 review of BPC-157 for musculoskeletal healing found an extensive animal literature but little clinical evidence supporting its use in people

The peptide achieves these complex neurological stabilizations largely through intricate, bidirectional interactions with the nitric oxide (NO) system, dynamically responding to both NO-system blockade (via L-NAME administration) and NO-system over-stimulation (via L-arginine administration) to restore neurological homeostasis

[1] Without intrinsic factor, dietary B12 cannot be absorbed effectively, leading to deficiency regardless of dietary intake

GHK-Cu resets what gets expressed