Missing the K-beauty cult favorite OST C20 for its lightening, brightening powers? Well, stop missing it and get on this newer, better OST C20, now rebranded as Tia’m My Signature C Source.  Formulated with the best, most effective vitamin C out there (ascorbic acid, and 20% of it!), the Tia’m C Source offers four main benefits: 1) It brightens and evens skin tone, 2) it fades post-inflammatory hyperpigmentation (PIH, those discolored scars from healing acne), 3) it minimizes the appearance of pores by clearing out blackheads and reduces fine lines, and 4) it boosts collagen production. The result? Brighter, smoother, firmer skin. Consider this your facial in a bottle.

Because vitamin C is notoriously unstable, store in the fridge, or at the very least, keep away from heat and light whenever possible. Also, avoid mixing with high levels of AHA, BHA, or retinoids to minimize irritation.

Apply after your toner all over the face or on trouble areas. Make sure to wear a broad spectrum, SPF 30 or higher sunscreen during the daytime.

Water, Ascorbic Acid, Alcohol, Sodium Lactate, Butylene Glycol, Glucose, PEG-60 Hydrogenated Castor Oil, 1,2-Hexanediol, Phenoxyethanol, Sodium Hyaluronate, Bis-PEG-18 Methyl Ether Dimethyl Silane, Xanthan Gum, Diethoxyethyl Succinate, Ammonium Acryloyldimethyltaurate/VP Copolymer, Carthamus Tinctorius (Safflower) Flower Extract, Citrus Aurantium Dulcis (Orange) Peel Oil, Glycerin, Zinc PCA, Panthenol, Niacinamide, t-Butyl Alcohol, Camellia Sinensis Leaf Extract, Beta-Glucan, Tocopheryl Acetate, Lecithin, Caprylic/Capric Triglyceride, Ubiquinone, Diisopropyl Adipate

TIA’M is obsessed with your skin concerns. The brand, formerly known as the cult favorite OST, offers products that are not just unique but thoughtfully formulated with active ingredients to really help you resolve your skin concerns.

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I have a love - hate relationship with this one.
LoooOve that is actually does ALL the things it claims to do, but hate that it leaves a sticky/tackiness feeling on my skin.