ProtoClinical k-beauty K-SECRET SEOUL 1988 GLOW SERUM : NIACINAMIDE 15% + YUJA 30ml in a single golden-yellow bottle, centered upright on a pale lavender background
K-SECRET

K-SECRET SEOUL 1988 GLOW SERUM : NIACINAMIDE 15% + YUJA 30ml

$26.20
Visibly brightens skin tone and fades uneven patches Delivers deep, lasting hydration that keeps skin plump throughout the day Provides intensive moisture that sinks in without heaviness

This is a high-potency vitamin tone-improving serum that targets dullness, dryness, uneven tone, and rough skin texture at the same time. Formulated with 15% high-concentration niacinamide and yuzu extract, it helps support brightening, anti-aging care, tone evenness, and hydration for an overall radiant complexion. The lightweight, hydrating texture is suitable for all skin types, and is especially ideal for dull, dry skin, leaving it looking clearer, more luminous, and comfortably moisturized with a healthy glow.

A high-strength glow serum for dull, dry skin that needs more clarity and luminosity.
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Niacinamide 15%: intercepts melanin transfer to fade spots and refine pore texture from within
K-SECRET SEOUL 1988 GLOW SERUM : NIACINAMIDE 15% + YUJA 30ml
K-SECRET SEOUL 1988 GLOW SERUM : NIACINAMIDE 15% + YUJA 30ml Default Title
$26.20
Ingredient-focused product details Clear use directions Full INCI when available Delivery confirmed at checkout
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Niacinamide 15%

Niacinamide works at the junction between melanocytes and keratinocytes, intercepting melanin transfer before pigment reaches the visible surface. It simultaneously boosts ceramide synthesis to strengthen the lipid barrier, which is why consistent use addresses both discoloration and dehydration. In K's serum, Niacinamide targets dehydration, delivering visibly brightens skin tone and fades uneven patches with consistent use.

Niacinamide 15%
intercepts melanin transfer to fade spots and refine pore texture from within
Texture

Lightweight, absorbing

All Skin Types Dry Skin
Hover the swatch: it ripples like water

How to use

1

Apply after toner.

2

Spread evenly over face and neck.

3

Pat in until absorbed.

4

Follow with moisturizer and daytime sunscreen.

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Ingredients

15% niacinamide and yuja extract support tone-evening, radiance, and hydrated glow.

Niacinamide works at the junction between melanocytes and keratinocytes, intercepting melanin transfer before pigment reaches the visible surface. It simultaneously boosts ceramide synthesis to strengthen the lipid barrier, which is why consistent use addresses both discoloration and dehydration. In K's serum, Niacinamide targets dehydration, delivering visibly brightens skin tone and fades uneven patches with consistent use.

The detail

Specs & details

FormatLightweight serum
SizeDefault Title
Skin typesAll Skin Types, Dry Skin
Country of originSouth Korea
Before you add to cart

Questions & answers

After cleansing and toning, before moisturizer. Serums deliver actives most effectively on freshly prepped skin.
Yes. Apply from thinnest to thickest consistency and allow each layer to absorb before the next.
Most users notice initial improvement within 2 to 4 weeks. For full benefits like visibly brightens skin tone and fades uneven patches, allow 6 to 8 weeks of consistent use.
Your skin begins adjusting. You may notice improved hydration and comfort before more visible changes like texture refinement become apparent.
Yes, this formula is developed to be compatible with all skin types dealing with dehydration. If you have very reactive skin, patch test on the inner arm before full application.
The formula is designed to be well-tolerated. For pregnancy-specific concerns, consult your healthcare provider. For sensitive skin, patch test before full application.
Niacinamide intercepts melanin transfer to fade spots and refine pore texture from within. Consistent daily use is key to seeing the full benefits.
Check the INCI list for the most accurate information on fragrance components. The formula is developed for minimal irritation potential.
Store in a cool, dry place away from direct sunlight. Use within 12 months of opening for optimal freshness and efficacy.
Serums have a higher concentration of targeted actives than essences and a lighter consistency than most ampoules. They deliver the most potent treatment in your routine.
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