COSRX The 6 Peptide Skin Booster Serum 150ml, 2-Pack

Features

COSRX The 6 Peptide Skin Booster Serum is a versatile, high-capacity daily serum designed to serve as the foundational first step in your skincare routine. Formulated to enhance skin vitality, this booster serum is suitable for all skin types and can be used regardless of the season or weather. It is a functional cosmetic product that aids in wrinkle improvement and skin brightening. The large-capacity bottle is ideal for multiple layering to provide deep, lasting efficacy.

Benefits

This serum provides multi-functional care by addressing various skin concerns, including evening skin tone, improving skin texture, and providing deep hydration. It helps to smooth fine lines, improve skin firmness, and provide care for pores and sebum. By using this serum as the first step after cleansing, it primes the skin and can enhance the effectiveness of subsequent skincare products, such as ampoules or other serums.

Main Ingredients and their effects

sh-Polypeptide-121: Assists with collagen boosting and skin plumping. Copper Tripeptide-1: Helps to retexturize the skin and manage blemishes. Acetyl Hexapeptide-8: Works to smooth fine lines and improve firmness. Oligopeptide-68: Provides brightening effects for a more even skin tone. Palmitoyl Tripeptide-8: Helps to soothe the skin and reduce sensitivity.

Certifications and Awards

COSRX The 6 Peptide Skin Booster Serum has received notable recognition, including being ranked 1st in the Essence/Ampoule/Serum category for anti-aging at the 2024 Hwahae Awards (first half). It was also recognized as a winner of the Allure Beauty & Style Expert Award and ranked 1st in the skincare category at Olive Young (as of July 1, 2025).

Clinical test results

In clinical trials involving 20 adults (aged 20–59), the serum demonstrated significant improvements: skin hydration increased by 162.50%, skin texture improved by 76.41%, skin brightness improved by 37.99%, skin density increased by 22.22%, skin radiance improved by 24.58%, and skin transparency improved by 40.11%. Additionally, testing on 20 subjects (aged 14–50) showed reductions in blackheads (-21.95%), whiteheads (-20.91%), excess sebum (-29.48%), and oiliness (-33.34%). The product has also passed a non-comedogenic test, confirming its suitability for acne-prone skin, and primary skin irritation tests have confirmed its suitability for sensitive skin.

Usage instructions

After washing your face, apply an adequate amount of COSRX The 6 Peptide Skin Booster Serum as the very first step of your skincare routine. Gently spread the serum over your face and pat softly to aid absorption. For optimal results, you may apply multiple layers to deliver abundant efficacy to the skin. It can be used alone or paired with other serums and ampoules to enhance the overall skincare routine.