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Multiple community reports describe improvements by day 2 or 3 that seem almost too fast to be real

The movement of these cells is considered dependent on the protein axin

Selank + Pinealon: Combines daytime anxiolysis and cognition with nighttime sleep optimization

PMID 7817664 Sudakova KV, Coghlan JP, Kotov AV, Salieva RM, Polyntsev YV, Koplik EV (1995)

BPC-157 may also upregulate the expression of early growth response gene-1 (EGR-1), which is a growth factor with potential benefits for the nervous system, having been suggested to aid in early extracellular matrix (collagen) formation [5]

Route of administration is not a convenience choiceit's a mechanistic requirement