gpx stands for glutathione peroxidase Glutathione peroxidase (GPx) redox cycle.
Description
Its important to note that water retention is a common side effect of many growth hormone secretagogues due to their effect on the bodys fluid balance

doi:10.1164/rccm.201510-1942OC Shaw JE, Punjabi NM, Naughton MT, et al

In a study on plant sorghum, the Ka/Ks ratios of these two domains suggested that both domains were under differential selective pressures and the GST_C domain might have been exposed to more relaxed functional constraints (Chi et al
Habig, W.H., Jakoby, W.B., Methods in Enzymology,Vol