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glutathione or niacinamide which is better for skin whitening Amazon.com: Cenffitio Supplement – Brightening Formula with Vitamin C, Niacinamide, Licorice Extract, Collagen & Hyaluronic Acid – Skin Brightness, Radiance & Hydration – 180 Tablets : Health & Household Niacinamide Glutathione Serum, 1.69 fl
Description
While sterile water must typically be used immediately after opening, bacteriostatic water can be used multiple times while maintaining sterility when stored correctly

"Boost your body's natural antioxidant defenses with Glutathione Precursors
2. Stier H, Vos E, Kenley D

What are plant-derived exosomes in skincare
