COSRX The 6 Booster Peptide Skin Booster Serum

Routine Step: Treatment, after cleansing and before moisturiser

After cleansing or watery toner, dispense a few drops and pat gently over the face. Follow with your serum, creamy toner or moisturizer.

Designed for easy layering, enhancing the affects of subsequent serums and ampoules when used before them.

Skin Types:  All skin types.

Skin Concerns: Fine lines & wrinkles, Sagging Skin and Dull Skin

Texture: Lightweight serum-like

Scent: Fragrance-free

Key Ingredients

6 peptide complex: fill and smooth wrinkles, regenerate, brighten the skin, give radiance, soothe irritation, reduce skin reactivity, regulate sebum secretion, reduce the appearance of pores.

Aminoacids: strengthen the skin's protective barrier, regenerate, have an anti-aging effect.

Hyaluronic Acid: reduces excessive water loss from the epidermis, moisturizes, softens, makes the skin more flexible and smooth.

Niacinamide: Strengthens the skin's protective barrier, regulates sebum secretion, has an anti-inflammatory, brightening effect, shrinks the sebaceous gland outlets.

Adenosine: delays the aging process, has a firming effect, accelerates skin regeneration and evens out skin tone.

Allantoin: Moisturizes, regenerates, reduces inflammation and accelerates the healing process.

Full Ingredients List: Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, sh-Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Serine, Alanine, Glycine, Threonine, Arginine, Proline, Betaine, Sodium PCA, Sodium Lactate, PCA, Glutamic Acid, Lysine HCl, Tocopherol, Dextran, Glycine Soja (Soybean) Oil, Hydrogenated Lecithin, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, t-Butyl Alcohol, Potassium Sorbate, Sodium Oleate

What makes COSRX The 6 Peptide Skin Booster Serum an all-in-one first-step serum?

COSRX The 6 Peptide Skin Booster Serum works as the first step after cleansing to prep and awaken the skin. Its six multi-peptides, hyaluronic acid, and amino acids help improve texture, firmness, and hydration. It enhances the effects of subsequent products, making it an ideal all-in-one base for any skincare routine.

When can I expect to see results from the 6 Peptide Skin Booster Serum?

Visible improvements are typically observed after four weeks of consistent use. In clinical testing, 100% of participants reported smoother and more supple skin, with measured increases in hydration (+162.5%), texture (+76.4%), and clarity (+40.1%). Many users notice enhanced glow and softness within the first week of daily application.

Can I use the 6 Peptide Skin Booster Serum with other actives?
Yes, the formula is designed for compatibility with other active ingredients. It layers well with Vitamin C, Retinol, Niacinamide, Ceramide, and Snail Mucin products to boost hydration, firmness, and radiance. Its low-irritation formula makes it safe for daily use, even in routines that include exfoliating acids or retinoids.

How is the 6 Peptide Skin Booster Serum different from regular peptide serums?
This peptide serum is a versatile starter that helps refine skin texture and boost overall skin health. Formulated with six carefully selected peptides, it supports hydration, brightness, density, radiance, clarity, and smoothness, working well with any next-step product.

Is the 6 Peptide Skin Booster Serum safe for sensitive or acne-prone skin?

Yes. Clinical studies from the Dermacosmetic Skin Science Laboratory confirm that the serum is safe for sensitive skin and suitable for acne-prone conditions. It is non-comedogenic and clinically proven, meaning it won’t clog pores or cause irritation, even with continuous use.

How can I integrate this serum into my skincare routine?

Apply the 6 Peptide Skin Booster Serum immediately after cleansing, as a toner before essence and thicker ampoule/serum. It acts as a hydration and prep step, enhancing the performance of following treatments like serums, ampoules, or creams. Use twice daily for optimal firmness, glow, and slow-aging benefits.

Who should use the 6 Peptide Skin Booster Serum?

This serum is suitable for all skin types, including sensitive and acne-prone skin. It has been clinically tested for non-irritation and non-comedogenic properties, ensuring that it does not clog pores. It is ideal for those seeking a single first-step product that enhances firmness, smoothness, and glow while maintaining a healthy skin barrier.