Various topical, oral, and injection-based cosmetic skin-lightening agents with different mechanisms of action are used widely across Asia, including hydroquinone, azelaic acid, kojic acid, mulberry, alpha-arbutin, beta-arbutin, glutathione, licorice root, papaya, vitamin A (e.g., retinol), vitamin B (i.e., niacinamide), and vitamin C
N-acetylcysteine, a medication used for respiratory conditions like asthma and cystic fibrosis, also happens to be a byproduct of Glutathione
interestingly two in silico screenings independently identified the COX-II inhibitor celecoxib as a potential anti-SARS-CoV-2 drug, and a very recent study still under peer review reports its beneficial effects plus famotidine in hospitalized patients (Tomera et al., 2020)
Cruciferous veggies Such as cabbage and cauliflower, also fall under this category
These six products suggest a daily serving of 500600 mg