[ K-SECRET ] SEOUL 1988 Glow Serum : Niacinamide 15% + Yuja 30ml

RECOMMENDED FOR: All skin types, dull and dry skin, skin dealing with pigmentation and trouble marks

PERFECT FOR: When dull complexion and pigmentation are on your mind, and you want a high-concentration niacinamide brightening serum

AM: After toner, take 2-3 drops and spread until the yuja capsules dissolve in, then absorb (suitable for morning/evening, though sensitive skin should start with evening use given the high 15% niacinamide content; sunscreen is essential for daytime outings).

PM: Fine yuja oil capsules sink in fresh for a shine with no greasiness. Free from synthetic fragrance, with a subtle, refreshing citrus scent naturally derived from yuja oil.

Niacinamide 15%, Yuja Oil Agar Capsules (Citrus Junos Fruit Oil), Glutathione & Tranexamic Acid, Panthenol & Squalane, Tocopherol & Sodium Ascorbyl Phosphate (Vitamin C Derivative)

- Niacinamide 15%: brightens a dull complexion and cares for marks and pigmentation, regulating excess sebum and refining pores
- Yuja Oil Capsules: fine capsules bursting on rolling deliver antioxidant nourishment for a non-sticky, glass-skin hydrated glow
- Glutathione & Tranexamic Acid: suppress melanin production for a brightening synergy; panthenol and squalane strengthen the barrier and maintain hydration

Korea's MFDS Maximum Concentration, a 15% Niacinamide Yuja Oil Capsule Brightening Serum

K-SECRET's SEOUL 1988 Glow Serum. Niacinamide at 15%, Korea's MFDS maximum notified concentration, brightens a dull complexion and cares for marks and pigmentation, while yuja oil capsules bursting on rolling deliver antioxidant nourishment for a non-sticky, glass-skin glow. Glutathione and tranexamic acid suppress melanin production for a brightening synergy.

Listed and sold as a flagship brightening product on Olive Young US and Olive Young Global.

PICK NO.3 RATING
BRIGHTENING: 3/5
SENSITIVITY: 4/5

WHY WE PICKED IT: Korea's MFDS maximum 15% niacinamide concentration, combined with a genuinely verified 4.7 rating on Olive Young US, made this an easy pick.

CLINICAL RESULTS: Formulated free from synthetic fragrance and alcohol (no official testing institution certification name confirmed).

SAFETY NOTES: For external use only. Avoid the eye area. Given the high niacinamide concentration, a patch test is recommended, and sunscreen use alongside is essential.

GLOBAL SALES: Listed and sold as a flagship brightening product on Olive Young US and Olive Young Global (cumulative sales figures not disclosed).

AWARDS: Not disclosed.

PICKER'S COMMENT: "Many reviewers report smoother, clearer texture (4.7 rating on Olive Young), and the oil capsules absorb smoothly with no stickiness for a fresh finish."

USAGE DURATION: Not disclosed (no period stated by the brand; 30ml, manufactured by Cosmax).

Water, Niacinamide (15%), Butylene Glycol, Glycerin, Glycereth-26, 1,2-Hexanediol, Caprylic/Capric Triglyceride, Pentylene Glycol, Macadamia Ternifolia Seed Oil, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyglyceryl-10 Laurate, Squalane, Panthenol, Hydrogenated Polydecene, Carbomer, Tromethamine, Hydrogenated Lecithin, Polyglyceryl-3 Methylglucose Distearate, Ethylhexylglycerin, Butyrospermum Parkii (Shea) Butter, Adenosine, Sodium Hyaluronate, Gellan Gum, Agar, Sodium Phytate, Beta-Glucan, Citrus Junos Fruit Oil, Glutathione, Helianthus Annuus (Sunflower) Seed Oil, Hydroxydecyl Ubiquinone, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Tranexamic Acid, Xanthan Gum, Tocopherol, Sodium Ascorbyl Phosphate (30ml (1.01 fl. oz.))

Q. How much niacinamide does it contain?
A. A 15% concentration, Korea's MFDS maximum notified level.

Q. What's its rating on Olive Young?
A. It holds a 4.7 rating on Olive Young US.

Q. Does it contain alcohol?
A. No, it's formulated free from both synthetic fragrance and alcohol.

Q. What are the yuja oil capsules?
A. Fine capsules that burst on rolling, delivering antioxidant nourishment for a non-sticky, glass-skin hydrated glow.

Q. Who is this best for?
A. All skin types, dull and dry skin, pigmentation and trouble marks

Q. Is there anyone who should skip this one?
A. If you're out in the sun often during the day, be sure to pair this with sunscreen.