For those curious about combining the two, theres no clear evidence on whether they work better together, but theres also no major red flag against it
For a subcutaneous (SubQ) injection, a finer, shorter needle is used, around 25 to 27 gauge and half to five-eighths of an inch
Arch Dermatol Res 301 , 301306 (2009)
A study that tackled this specific correlation and increased glutathione levels showed improvement in the amino acid cysteine, plasma sulfate, and whole-blood glutathione levels
Oprea AD, Ostapenko LJ, Sweitzer B, Selzer A, Irizarry-Alvarado JM, Hurtado Andrade MD, et al
10.1016/S0008-6363(02)00319-X