Su:m37° · K-Beauty
Best Su:m37° Products for Mature Skin
3 Su:m37° picks that actually work on mature skin — ranked by editor rating, not by what the brand pushes hardest. Updated 2026.
Su:m37° bet its entire identity on one idea: ferment everything, for exactly 365 days, and don't add synthetic preservatives. The Secret Essence is what happens when that philosophy actually works — a naturally-fermented essence with legitimate cult status. Not cheap, not preachy, and the formulas have held up for 15+ years.
Su:m37°
8.8/10 · essenceSecret Essence
LG's answer to SK-II Pitera — a naturally fermented essence that takes 50+ days in controlled fermentation tanks. The glow is real, the texture is water-thin, and the ferment is genuinely different from galactomyces. If SK-II is the J-beauty first treatment essence, Su:m37° is the K-beauty equivalent.
Su:m37°
8.8/10 · moisturizerLosec Summa Elixir Cream
Su:m37°'s flagship anti-aging cream — the Losec Summa Elixir is the Korean luxury answer to La Mer or Sulwhasoo's most premium tier. 80 fermented ingredients (Cytosis Complex 80) plus EGF + IGF growth factors plus a peptide stack plus a barrier-rebuilding ceramide-cholesterol-squalane base. This is the cream Korean executives buy as a luxury-skincare gift. Whether it's 'worth' $380 depends entirely on how much you value the LG-luxury sensory experience and the Korean-fermentation story. Objectively well-formulated; subjectively, a luxury indulgence.
Su:m37°
8.5/10 · serumLosecSumma Elixir Essential
Sum:37°'s top-tier anti-aging elixir — the brand's answer to La Mer Genaissance and Sulwhasoo Concentrated Ginseng Serum. Built on the same Lactobacillus/Soybean fermented Cytosis complex as Secret Programming, but at higher concentration and with hydrolyzed collagen + adenosine for the deep-firming claim. Rich treatment that should be paired with patience: results build over 12+ weeks of consistent twice-daily use.