SU:M37
★ LUXURY K-BEAUTY · NATURAL FERMENTATION
WATER.
FERMENTATION.
TIME.
SU:M37° (pronounced "Sum thirty-seven") is the Korean house of natural fermented skincare, created by LG Household & Health Care. Its name says it all: "SU" for water, "37°" for the ideal fermentation temperature of microorganisms. More than 80 plants, flowers, and fruits are fermented for hundreds of days to release bioavailable, concentrated, living active ingredients. A patient, sensory, premium K-beauty.
★ THE SU:M37° SIGNATURE
NATURAL FERMENTATION, THE HEART OF THE BRAND
One philosophy only: let time transform plants into living actives.
SU:M37° rejects synthetic preservatives and synthetic actives in favor of a long process: multi-strain natural fermentation of over 80 plant ingredients. The result is concentrated in Cinétiol®, the in-house fermented complex that nourishes all the ranges. Here are the 3 pillars of this signature.
✦ PILLAR 01
CINÉTIOL®
The brand’s signature fermented complex: a concentrate of plant extracts and microorganisms fermented together for 365 days to release amino acids, peptides, and antioxidants. The heart of the Secret Programming Essence.
✦ PILLAR 02
80+ FERMENTED PLANTS
Lotus, ginseng, peony flower, Korean fruits: over 80 plant ingredients are selected and then fermented together. Each season, the brand adjusts the composition according to the skin’s needs.
✦ PILLAR 03
ZERO SYNTHETIC PRESERVATIVES
Fermentation acts as a natural preservative. SU:M37° formulates without parabens, denatured alcohol, mineral oil, or artificial coloring: purity is claimed as its signature.
Time as an asset, fermentation as a method, purity as a requirement: SU:M37° is the most patient luxury K-beauty brand on the market, unique within the Amorepacific/LG galaxy.
★ THE SIGNATURE RANGES
THE 3 ICONIC RANGES
From iconic essence to top tier anti-aging: choose your range according to your goal.
SECRET PROGRAMMING
The signature fermented essence
The historic range. The Secret Programming Essence with 80+ fermented plants is the brand’s absolute bestseller: a sensory concentrate that brightens, plumps, and smooths in one step.
WATER-FULL
Long-lasting hydration
Dedicated to thirsty skin, the Water-full line focuses on hydrating fermented actives (algae, aquatic flowers) for water-filled, plumped, and comfortable skin.
LOSEC SUMMA
Top tier anti-aging
The most precious range of the house. Losec Summa Elixir concentrates the rarest fermented actives to target deep wrinkles, firmness, and density — the pinnacle of SU:M37°.
★ THE ENTIRE COLLECTION
DISCOVER THE ENTIRE COLLECTION
SU:M37° BELOW
From the iconic Secret Programming Essence to the Water-full and Losec Summa treatments, find all SU:M37° skincare products naturally fermented — imported directly from Seoul, with no customs fees.
SU:M37 LosecSumma Repair Ampoule 50ml
SU:M37 LosecSumma Repair Essence 30ml
SU:M37 LosecSumma Repair Essence 60ml
SU:M37 LosecSumma Secrema Essence 150ml
SU:M37 LosecSumma Emulsion 130ml
SU:M37 LosecSumma Skin Softener 150ml
SU:M37 LosecSumma Repair Cream Refill 50ml
SU:M37 LosecSumma Repair Cream 50ml
★ TO GO FURTHER
THE UNIVERSE OF KOREAN LUXURY
SU:M37°, The History of Whoo, Sulwhasoo, OHUI — premium K-beauty houses to know.
The History of Whoo: the absolute luxury of royal K-beauty
The History of Whoo cultivates the other side of Korean luxury: royal hanbang and imperial pharmacopoeia, signed like SU:M37° by the LG H&H group.
READ THE ARTICLE →
SULWHASOO: the quintessence of luxury K-Beauty
Sulwhasoo, the grand dame of Amorepacific, shares with SU:M37° the obsession for patient, sensory, and concentrated care — the Korean ginseng version.
READ THE ARTICLE →
OHUI: the Korean dermatological brand by LG Household & Health Care
OHUI, the other luxury signature of LG H&H, focuses on dermatological science and high-performance anti-aging — the clinical approach of the same group.
READ THE ARTICLE →★ YOUR QUESTIONS
SU:M37° FAQ
Everything you need to know about the purest fermented K-beauty.
Which SU:M37° product should I start with?
The Secret Programming Essence is the essential starting point: it’s the brand’s icon, a 365-day fermented essence that brightens, hydrates, and smooths in one step. For dehydrated skin, complement with the Water-full Skin Refreshing Toner.
What does fermentation do for my skin?
Fermentation transforms plant molecules into more bioavailable active ingredients that are smaller, more stable, and better absorbed by the skin. In practice: more radiance, a strengthened skin barrier, and prolonged effectiveness even at low concentrations.
Is it compatible with sensitive skin?
Yes, the brand was designed for that. SU:M37° excludes parabens, denatured alcohol, mineral oil, and artificial coloring. Fermented formulas are generally very well tolerated — still, do a patch test on your inner elbow before first use.
What is the difference between Secret Programming and Losec Summa?
Secret Programming is the multi-action fermented icon (radiance, hydration, early wrinkles). Losec Summa is the brand’s top tier, focused on deep anti-aging — firmness, established wrinkles, loss of density. Losec Summa is more precious, richer, and more targeted.
How long before seeing results?
With the Secret Programming Essence, radiance and comfort are visible in 2 to 3 weeks. For wrinkles and firmness (Losec Summa), expect 6 to 8 weeks of regular use — fermentation works deeply, not just on the surface.
Are the SU:M37° products on Ma Petite Corée authentic?
Yes, 100%. Ma Petite Corée has been based in Seoul since 2017 and sources directly. Every product is new, sealed, and shipped from Korea, with no customs fees charged to you in the EU.