ProtoClinical k-beauty Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml single boxed serum package in a front-facing packshot on a clean white background
ProtoClinical k-beauty Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml single boxed serum package in a front-facing packshot on a clean white background
ProtoClinical k-beauty Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml single upright deep rose bottle centered on a white background with soft blue and blush corner accents
ProtoClinical k-beauty Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml single upright taupe bottle centered on a white background with soft blue corner accents
Cos De BAHA

Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml

$15.10
Visibly brightens skin tone and fades uneven patches Evens out skin tone for a clearer, more uniform complexion Fades the look of dark spots and post-inflammatory marks
Formulated with powerhouse ingredients like tranexamic acid and glutathione, this brightening serum is a whiz at fading dark spots and hyperpigmentation, while evening out skin tone. It also contains green tea extract to help alleviate acne breakouts and panthenol to enhance the skin’s barrier function. This T15 Serum...
For all skin types dealing with dullness and fatigue: Cos De BAHA's serum with Panthenol (Vitamin B5) works from within to deliver visibly brightens skin tone and fades uneven patches, not just temporary comfort.
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Korean Beauty Formulation Suitable for Daily Use
Panthenol (Vitamin B5) Green Tea Extract Tranexamic Acid 15%
Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml
Cos De BAHA T15 Tranexamic Acid 15% Serum 30ml Default Title
$15.10
Clinically proven actives Dermatologist tested 100% authentic Korean Cruelty-free
Pairs beautifully with

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$15.10

Panthenol (Vitamin B5), Green Tea Extract, and Tranexamic Acid 15%

Panthenol converts to pantothenic acid (vitamin B5) inside the skin, where it plays a role in coenzyme A synthesis, essential for skin barrier repair. It hydrates not by sitting on the surface, but by integrating into the lipid bilayer and attracting water molecules from deeper layers. In this serum, Panthenol (Vitamin B5) targets dullness and fatigue, delivering visibly brightens skin tone and fades uneven patches with consistent use.

Panthenol (Vitamin B5)
penetrates deep to hydrate from within and repair compromised barrier tissue
Green Tea Extract
delivers epigallocatechin gallate (EGCG), one of the most potent natural antioxidants known
Tranexamic Acid 15%
blocks melanin transfer to fade stubborn dark spots that resist other treatments
The texture

Lightweight, absorbing serum

Formulated with powerhouse ingredients like tranexamic acid and glutathione, this brightening serum is a whiz at fading dark spots and hyperpigmentation, while evening out skin tone. It also contains green tea extract to help alleviate acne breakouts and panthenol to enhance the skin’s barrier function.

  • This T15 Serum with Tranexamic Acid to fade dark spots and improve hyperpigmentation.
  • Enriched with Glutathione to help even skin tone and brighten dull skin.
  • Contains Camellia Sinensis Leaf Extract that protects the skin from harmful UV rays.
All Skin Types Dullness and Fatigue Acne and Breakouts Dark Spots
Hover the swatch: it ripples like water

How to use

1

Step 1: After cleansing and toning, press 2 to 3 drops onto fingertips.

2

Step 2: Gently pat and press across forehead, cheeks, nose, and chin.

3

Step 3: Allow 30 seconds for full absorption before the next step.

4

Step 4: Follow with moisturizer. Use sunscreen in the morning.

Full transparency

Ingredients

Panthenol (Vitamin B5) penetrates deep to hydrate from within and repair compromised barrier tissue, Green Tea Extract delivers epigallocatechin gallate (EGCG), and Tranexamic Acid completes the formula as a blocks melanin transfer to fade stubborn dark spots that resist other treatments.

Panthenol converts to pantothenic acid (vitamin B5) inside the skin, where it plays a role in coenzyme A synthesis, essential for skin barrier repair. It hydrates not by sitting on the surface, but by integrating into the lipid bilayer and attracting water molecules from deeper layers. This deep-acting mechanism is why panthenol is often the first ingredient recommended for barrier-damaged or post-procedure skin.

The detail

Specs & details

FormatLightweight serum
SizeDefault Title
Skin typesAll Skin Types
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 dullness and fatigue. 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.
Panthenol (Vitamin B5) penetrates deep to hydrate from within and repair compromised barrier tissue. 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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About the brand

OriginSeoul, KR
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