COSRX The 6 Peptide Skin Booster Serum 150mL

A booster serum is used early in a routine, before thicker serums and moisturizers. This product has a thin, toner-like feel rather than the richer texture of a concentrated ampoule. COSRX recommends using it directly after cleansing to establish a hydrated base for the steps that follow.

The six-peptide blend is supported by niacinamide, adenosine and a broad collection of moisturizing ingredients. That combination allows one step to address the appearance of several concerns, including dullness, uneven texture and loss of suppleness. It does not replace a moisturizer or sunscreen, and you do not need to add every product shown in a brand routine panel to use it effectively.

Six peptides in a fluid, first-step pump serum

The formula is deliberately light so it can sit early in a layered routine. Its 150mL format offers more volume than a small dropper serum, while the pump makes dispensing straightforward. The peptide blend includes six named ingredients rather than a vague promise of a single unidentified peptide complex, with additional humectants and skin-conditioning ingredients providing everyday support.

• Six-peptide blend: Contains acetyl hexapeptide-8, copper tripeptide-1, sh-polypeptide-121, dipeptide diaminobutyroyl benzylamide diacetate, oligopeptide-68 and palmitoyl tripeptide-8. These ingredients support the finished formula’s firmness, smoothness and overall skin-conditioning focus.
• Hydration-focused companions: Glycerin, sodium hyaluronate, betaine and amino acids help maintain a comfortable, hydrated feel. The watery texture allows the product to spread readily before the richer products that complete a routine.
• Niacinamide and adenosine: These ingredients complement the peptide blend for a more even-looking, supple complexion. Acetyl glucosamine and allantoin add further support without making this a separate exfoliating peel or a rinse-off product.
• 150mL pump bottle: Dispense 2–3 pumps after cleansing, then pat gently into the skin. Additional layers are optional, not required; use the amount that feels comfortable and follow with the skincare appropriate to your own needs.

A hydrated base with a smoother-looking finish

This booster is useful when you want an early skincare step that addresses hydration and surface appearance together. The fluid feel makes it easy to keep the routine comfortable even when you use a second serum. Its cosmetic benefits develop through regular use and do not require an unnecessarily long list of products afterward.

• Comfortable preparation: Adds a light moisture layer immediately after cleansing, so skin feels less bare before the next serum or cream. It is particularly convenient when richer first steps feel heavy.
• Smoother-looking texture: Helps improve the appearance of unevenness and supports a softer, more supple finish. This is gradual skin-conditioning care rather than an instant resurfacing treatment or an abrasive scrub.
• More visible radiance: Hydration and tone-focused ingredients help dull-looking skin appear fresher and more luminous. Daily sunscreen remains a separate requirement for a routine concerned with uneven tone and visible aging.
• Flexible routine building: Use it as the early hydration step before products chosen for your own concerns. Its light texture lets you keep the following layers selective instead of adding multiple heavy serums.

You Get:

• 1 × COSRX The 6 Peptide Skin Booster Serum 150mL