You'd add 5mL bacteriostatic water instead, creating a 10mg/mL solution where 0.25mL = 2.5mg
To date there are no published clinical trials that have evaluated the use of injectable glutathione for skin lightening, the FDA wrote in a published advisory
Shirlee TanBSPDavid SchubertBSPPamela MaherBSP
In particular, some studies report the ratio of free GSH to GSSG [19, 22,23,24,25,26], whereas others quantify and report total GSH (i.e., free GSH + 2xGSSG) [12, 19, 24, 26,27,28,29,30]
It was revealed that, in comparison to the severely compromised healing observed in sham and control rats, the systemic delivery of BPC 157 significantly improved recovery measures (Staresinic et al