amount of glutathione for skin whitening What Is Glutathione's Role in Lightening? Glutathione Injections For Skin Whitening:

"GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration." BioMed Research International , 2015

You should also look at lower concentrations of the active ingredients, as higher concentrations don't necessarily mean they'll work better or faster

The recommended dose of ALIMTA for treatment of recurrent non-squamous NSCLC in patients with a creatinine clearance (calculated by Cockcroft-Gault equation) of 45 mL/min or greater is 500 mg/m2 as an intravenous infusion over 10 minutes on Day 1 of each 21-day cycle until disease progression or unacceptable toxicity

Tesamorelin has FDA approval for specific conditions, providing a more regulated option