c.1283_1284insT, p.E429Gfs*7
But here is the critical context most supplement marketers leave out
The rats were randomly divided into 4 groups (each group of 20 rats): group A1 (normal control group under normoxia), group A2 (normal control group under normoxia, received low-dose l-carnitine at 50 mg/kg), group A3 (normal control group under normoxia, received high-dose l-carnitine at 100 mg/kg), group B (plateau model control group, received injecting normal saline), group C (low-dose l-carnitine intervention altitude model group, received 50 mg/kg l-carnitine) and group D (high-dose l-carnitine intervention altitude model group, received 100 mg/kg l-carnitine)
no proven morning-versus-night advantage Injectable use No FDA-approved product label or validated self-injection schedule Sources: Topical GHK-Cu phase 2 study Direct answer: There is no clinically proven universal best time for GHK-Cu
This was also supported by the downregulated expressions of glycolysis-related genes ( PFK and PK ) in muscle, and the upregulated expressions in gluconeogenesis-related genes ( PECK1 and G6Pa ) in the liver