The 13 Best CosRx Products That Prove Why This K-Beauty Brand Is Famous

“It’s a great entry serum for those in their late 20s to 40s who are beginning preventative antiaging routines,” says Dr. Hwang. “I appreciate how well it absorbs—there’s no tackiness, and it layers seamlessly under other skin care products.” He recommends that his patients apply it on “humid days when heavier serums feel suffocating,” although it can benefit any skin type, year-round. “Patients often tell me their skin feels firmer and more hydrated with consistent use,” he says.

This exfoliating toner, which helps diminish pimples, is one of CosRx’s most frequently-searched products. Dr. Hwang is a fan because of its gentle yet effective formula, which combines glycolic acid (an alpha-hydroxy acid, or AHA) with betaine salicylate (a BHA). “Glycolic acid exfoliates and promotes skin turnover, and betaine salicylate clears sebum and prevents blackheads,” he explains. The formula is also packed with willow bark water, “a natural anti-inflammatory and mild exfoliant,” says Dr. Hwang.

One of my favorite features of this toner is that it’s mild enough for regular use, even on my sensitive skin. “It's gentle enough for daily use and pairs well with both prescription and over-the-counter routines,” says Dr. Hwang. “I typically recommend this to younger patients dealing with uneven texture, mild breakouts, or congestion. I’ve also used it during travel when my skin becomes congested and found that it helps smooth out texture within a few days without causing dryness. The spray-type bottle is also convenient for quick use without overapplication.”

According to Cho, this treatment is “hands down one of the most effective yet gentle BHA products I’ve used.” This chemical exfoliator contains the same betaine salicylate (BHA) you’ll find in the brand’s AHA/BHA Clarifying Treatment Toner (above) but at a higher 4% concentration. “Betaine salicylate is a gentler derivative of salicylic acid that keeps my pores clear and skin texture refined,” she says. The formula also features willow bark water, niacinamide, and sodium hyaluronate to keep skin feeling balanced while targeting uneven texture and clogged pores. “I always recommend it to anyone dealing with congestion or blackheads,” says Cho. “It helped me clear my hormonal acne.”

Best Sheet Mask: CosRx Advanced Snail Mucin Glass Glow Hydrogel Mask

I’ve tried every viral overnight Korean face mask on the market, and I couldn’t wait to get my hands on this snail mucin version when it launched. As with other popular hydrogel masks, you can wear this one for a few hours until it changes color and hardens, or leave it on while you sleep. It’s packed with calming, hydrating ingredients for an intense moisture treatment. “Snail mucin hydrates and supports skin regeneration, allantoin calms irritated or post-procedure skin, and hyaluronic acid restores moisture and adds plumpness,” says Dr. Hwang. “This is one of my go-to recommendations for patients recovering from RF (radio frequency), lasers, or any irritation-prone treatments.” Compared to traditional sheet masks, Dr. Hwang says, hydrogel versions not only feel more cooling “but also enhance ingredient delivery.” He recommends this one for “dry, tired skin” that needs a reset. “Personally, I’ve used it after long-haul flights and always notice an immediate improvement in hydration and skin texture,” he says. While I personally have yet to wear this mask on a flight, I like applying one for a few hours while I hit deadlines, then peeling it off to an impressive glass-skin glow.

As a beauty editor who never gets enough sleep, I always keep a tub of eye patches on my desk, and these have been on regular rotation lately. They’re packed with all the ingredients I like in my favorite Korean eye creams, such as caffeine and hyaluronic acid. The formula also contains peptides to “improve firmness and elasticity under the eyes,” niacinamide to “brighten dark circles and even tone,” and hydrolyzed collagen to “hydrate and support dermal density,” says Dr. Hwang. Even if you’re already using an eye cream, he recommends these as a “great option for those looking for visible results” before events or after a long day. “Over several days of use, I noticed more than just a temporary depuffing effect—my undereye area felt noticeably calmer, smoother, and slightly brighter,” he says.

“I was really impressed with these hydrogel eye patches,” says Glamour commerce writer Alanna Martine Kilkeary. “Word to the wise, they are a bit sticky and goopy during application, but this formula melts down to a nice lightweight serum while sitting on the undereye area. My eyes were particularly dark and puffy when I tested these, and I think they did a great job of brightening and softening my fine lines in the area. Not to mention, I love that they’re hot pink!”

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