I read a couple arguments for cognitive sharpness because of 157, here's a quote about it helping with depression!!I don't know too much about this but I've read BPC 157 has healing properties in the brain. It might be something to look into.
By stabilizing the production of certain hormones like serotonin, BPC 157 may promote mental health by improving depression-type symptoms. Research published in the Journal of Physiology – Paris found BPC 157 to have comparable effects to antidepressants, with no side effects.[1