Additionally, the concentration of AOD9604 in the synovial fluid after injection was estimated to be about 0.19 mg/mL, similar to concentrations used in previous GH injection studies in animal models
Nowak C, Hetty S, Salihovic S, Castillejo-Lopez C, Ganna A, Cook NL, et al
Cooper AJL, Mora SN, Cruz NF, Gelbard AS (1985) Cerebral ammonia metabolism in hyperammonemic rats
While more clinical research is needed to see if they specifically boost each other's absorption, the anecdotal evidence from athletes and military personnel suggests that this "stack" is a reliable way to support performance without the need for heavy stimulants
Following oral administration, glycyrrhizin exhibits low oral bioavailability, primarily because it requires enzymatic hydrolysis by intestinal microbiota to generate its active metabolite, GA, which is then absorbed into the systemic circulation (Ploeger et al., 2001)