Korea · Serum

The 6 Peptide Skin Booster Serum

COSRX

Six peptides in a large-format booster — an easy first step into peptide care.

Key actives: Peptides
Skin goals: Firmness · Fine Lines
Size: 150 ml
Approx. price: $25

Buy — from $25 Opens the retailer’s page in a new tab. Prices change with promotions — the shop shows the current one.

The 6 Peptide Skin Booster Serum is a serum from COSRX (Korea), 150 ml. Key actives: Peptides.

Typically bought for: firmness, fine lines. Price is approximate and changes with promotions — the button above opens the shop page with the current one.

Frequently asked

How long does a 150 ml peptide serum last?

Used morning and night on the face and neck, the 150 ml bottle typically lasts four to six months. The large format is meant to be used generously, like a watery first serum.

Can I use peptides with retinol or exfoliating acids?

Peptides layer well with retinol and niacinamide. If you use strong exfoliating acids, apply them at a separate time of day so the two are not sitting on skin together.

What do peptides actually do for skin?

Peptides are short chains of amino acids used to support the look of firmness and fine lines. Changes are gradual and subtle, so give it eight to twelve weeks of consistent use before judging.

Is this serum suitable for oily or sensitive skin?

The texture is watery and light, which suits oily and combination skin, and there are no exfoliating acids that would sting reactive skin. Patch test first if new products tend to bother you.