glutathione and adapalene Differin 0.1% Acne Treatment Gel Adapalene Gel USP, 0.1% –
Description
This is not about choosing one strategy over another

(PubMed) Traber MG, Leonard SW, Ebenuwa I, et al
PLoS ONE 8:e70295
Pharmacies can provide certificates of sterility and quality upon request
BMC Dermatol (2003) 3:1