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Glutathione (1,000ppm) delivers antioxidant protection and tone evening , while Hyaluronic Acid and Beta-Glucan round out the formula by locking in deep, plumping hydration

(This explains why hydroquinone has long been used for melasma removal , where brown or gray-brown patches of skin appear on foreheads, cheeks, chins and bridge of the nose.) In smaller doses (of at most 2%), hydroquinone can be purchased over-the-counter but pigment removal products with at least 4% hydroquinone concentration (considered to be the most effective concentration), require a prescription from a skin care specialist

PMID 7002186

10.1016/j.jhepr.2023.100670 50 JiS.ZhangL.HuiL

A 0.25mg starting dose at that concentration is 2.5 units at the edge of insulin-syringe measurement accuracy