[CosDeBAHA] Facial Serum w/ Hydro quinone 2% Arbutin 4% Niacinamide 4%Salicylic Acid Lactic Acid HA Face Brightening Organic 52% Product FeaturesIndicationsBrightening, Lightening, Hyperpigmentation, Melasma, Brown or Dark spots, "Liver" spots, "Age" spots, Freckles - Cos De BAHA HB Serum contains Hydro quinone 2%, Arbutin 4%, Niacinamide (Vitamin B5) 4%, Salicylic Acid, KO Jic Acid Lactic Acid and Hyaluronic Acid as acitive ingredients. Suggested Usage:After cleansing and toning,Apply serum to dark spots on skin at night and absorb.Don't apply serum all over your face.Use it every other day for the first time.After the serum is adapted to the skin, apply it once a day.Make sure to apply sunblock cream when applying in the morning.After 60 days, stop using this product and rest your skin for 30 days. Please do a patch test on skin before use. Product Details PH : 5.7-5.9Full Ingredients *Aloe Barbadensis Leaf Extract, Propanediol, Arbutin 4%, Niacinamide 4%, 1,2-Hexanediol(Moisturizer and Alternative Preservative), Hydro quinone 2%, Citric Acid, Sodium Citrate, Sodium Hyaluronate, Salicylic Acid(BHA), Ko jic Acid, Lactic Acid, *Hamamelis Virginiana (Witch Hazel) Leaf Extract, *Rosmarinus Officinalis (Rosemary) Extract, *Eucalyptus Globulus (Eucalyptus) Leaf Extract, *Thymus Vulgaris (Thyme) Extract, *Aspalathus Linearis (Rooibos) Extract, Disodium EDTA*Mark Organic Ingredients, Organic 52% WarningFor external use only. Avoid direct contact with eyes.Discontinue use if irritation or redness occurs.Keep out of reach of children.If you are pregnant or nursing, consult your doctor before use. What is Hydro quinone? Hydro quinone is a Melanin Synthesis Inhibitor. The mechanism of action of hydro quinone is as a Melanin Synthesis Inhibitor. The physiologic effect of hydro quinone is by means of Depigmenting Activity.Skin care products with hydro quinone are often called bleaching creams or lightening agents. These skin care products are used to lighten hyperpigmentation, such as age spots and dark spots related to pregnancy or hormone therapy (also called melasma). what is salicylic acid?“It is a beta-hydroxy acid, also known as a BHA. There are two kinds, alpha hydroxy acids, which gently exfoliate the top layer of skin to smooth and even out skin tone, and beta, which has similar exfoliating powers with the added bonus of unclogging pores and acting as an antibacterial agent. what is niacinamide?Also known as vitamin B3 and nicotinic acid, niacinamide is a very effective skin-restoring ingredient that offers multiple benefits for aging skin. Among these benefits is the ability to visibly improve the appearance of enlarged pores, uneven skin tone, fine lines, dullness, and a weakened skin surface. Hydro quinone, Ko Jic Acid, Salicylic Acid (BHA), Niacinamide Skin Benefits Lightening, BrighteningHyperpigmentationMelasma Treatment FadeBrown or Dark SpotsOily SkinDead Skin Cells Cleans Large PoresAcne Here are some specific skin concerns you can treat with Hydro quinone, Salicylic Acid: Hyperpigmentation: Hydro quinone is a Melanin Synthesis Inhibitor. The mechanism of action of hydro quinone is as a Melanin Synthesis Inhibitor. The physiologic effect of hydro quinone is by means of Depigmenting Activity. Oily skin: Derms agree: Salicylic acid is one of the few ingredients that can actually SLOW DOWN your skin's oil production. "Salicylic acid decreases oil production," says Dr. Annie Chiu, while Dr. Sue Ann Wee says "salicylic acid can reduce sebum secretion." The trick is to find the right amount and frequency to keep your skin's oils in balance without over-drying.Large pores: "The reason pores look bigger than they actually are is because they're clogged with dead skin cells mixed with oil," says esthetician Shani Darden. Salicylic acid helps unclog them, so they're not so stretched out and will appear smaller. 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