SK-II Facial Treatment Essence Dupes: 5 Cheaper Alternatives

Ingredient one is the same and the stated percentage is higher: 95% galactomyces ferment filtrate against SK-II's more than 90%. That single line is why this is the dupe most people land on, and it holds up. What changes is everything underneath. SK-II's remaining six ingredients are two glycols, water and three preservatives. COSRX adds niacinamide, panthenol, glycerin, sodium hyaluronate, allantoin, adenosine and xanthan gum, so what you buy is a ferment plus a full hydrating base, not a ferment on its own.

The xanthan gum is the part you feel. A two-week split-face comparison posted to r/AsianBeauty in 2023 reported no visible difference in results, but described the COSRX texture as a lightweight gel against SK-II's liquid and noted it dried down faster, enough that the tester started misting before the next step. If the press-and-pat minute is the part of SK-II you like, that will irritate you.

Not everyone in that thread agreed. One commenter said COSRX did nothing for them and rated Elizavecca's galactomyces filtrate higher. A stated 95% settles what is in the bottle, not how your skin will read it.

Per ml is where the case closes. $24.00 for 100 ml is $0.24 per ml, against $1.32 per ml for SK-II's 75 ml bottle. COSRX's own store listed it at $24.00 but on backorder when we checked on 22 August 2026, while Ohlolly had it in stock at the same price. UK readers get a real retailer for this one: LOOKFANTASTIC listed the same 100 ml at £26.99, or £0.27 per ml, under the older name Galactomyces 95 Whitening Power Essence.

$18.56 for 150 ml is $0.12 per ml. SK-II's 75 ml bottle is $1.32 per ml. That is most of the argument, and the ingredient list makes it stick: galactomyces ferment filtrate, butylene glycol, 1,2-hexanediol, nothing else. SK-II opens with galactomyces ferment filtrate and butylene glycol as well, then adds pentylene glycol, water and three preservatives. Same skeleton, fewer bones.

What you give up is any hedging. Nothing in the bottle is doing tone work, holding water or buffering a reaction. On dry skin it vanishes and leaves the moisturiser to do all the lifting. On oily and normal skin that is precisely the appeal, and it is the only product on this page you could plausibly use on neck and chest twice a day without rationing it.

Buying is the weak link. Cupidrop had it at $18.56 against a $29.00 list price on 22 August 2026, and StyleJolly listed the same bottle at $25.83 that day. Both are importers, not brand stores, so check the printed expiry before you order and assume the price you see now will not hold next month.

This is the one that feels right in the hand. What long-term SK-II users describe is a pour: two or three shakes into the palms, a minute of pressing, no film left behind. Secret Key's Rose Edition does that. It is 94% galactomyces ferment filtrate across nine ingredients, and the liquid is genuinely liquid, not the light gel COSRX gives you.

The trade is botanical. Rosa centifolia flower water, grapefruit extract, sweet flag root and perilla leaf all sit in the list. SK-II runs zero plant extracts, and that austerity is a large part of why it suits reactive skin. Four extracts is four more things to react to. Accounts of whether the rose is noticeable disagree, which usually means faintly.

MOIDA had it at $25.20, down from a $36.00 list, in stock when we checked, with a March 2027 expiry printed on the listing. That is $0.17 per ml against SK-II's $1.32. A long-time SK-II user posting in r/30PlusSkinCare said this was the only galactomyces essence they had tried that came close, which is worth more than a brand claim because they had already paid for the original.

Two ingredients. Galactomyces ferment filtrate, butylene glycol, stop. SK-II's list opens with exactly those two before adding pentylene glycol, water and three preservatives, so on structure alone nothing on this page is closer, and SkinSort's ingredient-similarity ranking picks it out as the nearest match in its database.

The gap is the number Mixsoon will not print. No ferment percentage appears anywhere on mixsoon.us, and Skin Cupid's US listing states 60%. If that is right, this is a materially weaker ferment than COSRX at 95% or Secret Key at 94%, and the two-ingredient list is a tolerability feature, not a potency claim. It is dear for what it is: $32.00 for 100 ml on the brand's own store is $0.32 per ml, more than double One Thing, and Skin Cupid's $25.60 still works out at $0.26. Soko Glam and Twenties Beauty were both out of stock the same day.

The ferment is real: 92%, ingredient one, in line with everything else here. The reason to buy it is the other number. 5% niacinamide is a working dose and not a rounding error, and it aims at the thing people actually want from SK-II, which is tone more than hydration. On oily skin, or skin carrying post-acne marks, that pairing beats the original at the job the original is famous for.

It is the furthest of these five from SK-II's philosophy. SK-II is one ferment and six inert ingredients. This is one ferment, a serious active, and two more ferments in lactobacillus and bacillus/soybean. The percentage that makes it good is the percentage that rules it out if you flush on niacinamide, and 5% is high enough that plenty of people do.

Size is the catch. 60 ml at $22.00 on purito.com, in stock on the day we checked, works out at $0.37 per ml, three times One Thing and the dearest here. SK-II's own 75 ml lasts most people one to two months applied by hand, so budget for reordering this one sooner than that. Purito also rebranded as Purito Seoul after a 2021 sunscreen SPF controversy, so reviews written before then describe a different company. Skinsider UK listed it at £14.00, which is £0.23 per ml, though we could not confirm a direct product URL, so the UK link runs a search.