로섹 숨마 엘릭서 세럼
su:m37°
An ultra-premium anti-aging serum with triple-fermented lotus complex and golden serum particles that intensely firms, plumps, and rejuvenates mature skin. Flagship luxury treatment.

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Losec Summa Elixir Serum is a serum by su:m37°. Subscribe to Seoul Sister for full ingredient analysis across our database of 5,900+ K-beauty products.
Losec Summa Elixir Serum is a Korean serum by su:m37°. Sensitive skin compatibility depends on individual triggers and allergies. Seoul Sister's AI advisor Yuri analyzes all N/A ingredients against your specific skin type, concerns, and known allergens to provide a personalized compatibility score. Common irritant ingredients like fragrance, alcohol denat, and essential oils are flagged automatically.
For oily skin, the key factors in evaluating Losec Summa Elixir Serum are comedogenic ingredient ratings, oil content, and finish type. Seoul Sister's database cross-references each ingredient's comedogenic rating (0-5 scale) against your skin type to identify potential pore-clogging risks. Subscribe for a personalized oily skin compatibility analysis.
Losec Summa Elixir Serum by su:m37° is sold through authorized retailers and the brand itself. Buy from an authorized retailer or the brand's own site rather than an open marketplace. Olive Young Global ships to most countries but no longer ships to the US. Seoul Sister tracks counterfeit indicators to help you buy genuine Korean skincare. We are an advice platform and never sell products ourselves.
That $11 Korean cleanser outperforming your $38 one is not hiding anything. The low price comes from how the Korean beauty industry is built, not from what is in the bottle. With one geographic catch.
Sulwhasoo First Care Serum is a $90+ luxury product, which makes it one of the most counterfeited items in K-beauty. Here are five verifiable checks (from packaging weight to barcode origin) to confirm your bottle is real before it touches your face.