Operational radiation protection for human space flight: the flight surgeons perspective
The effects of BPC on wound healing are much clearer: It absolutely can help test subjects regenerate tissue
Permanent damage is unlikely unless you have overdosed, chronic use with liver compromise, or severe malnutrition
In this, pentadecapeptide BPC 157 consistently (grossly, microscopically, and biomechanically) cured burn injuries, and counteracted corticosteroid (6-methylprednisolone 1.0 or 10 mg/kg/day ip for 21 days)-induced impairment of burn healing (Mikus et al., 2001
Pain relief tissue healing
Clearly, if there are indications of leaky guy, poor gut biome, use of medications, or challenged liver function, for example, then other support may be needed.