COSRX’s toner-like peptide booster with six peptides, hyaluronic acid and niacinamide, used as a first step to hydrate and prep skin for the rest of the routine.
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Peptides are a gentle way to add firming-focused care without the irritation of stronger actives. COSRX puts six of them into a watery, toner-like booster that absorbs instantly and preps skin for serum and moisturizer.
✓6 multi-peptidesincluding copper tripeptide-1 and acetyl hexapeptide-8
✓Toner-like texturelightweight and non-sticky
✓Tested for sensitive skinnon-comedogenic and irritation tests, per COSRX
What’s inside
Booster ingredients
COSRX lists a peptide blend supported by hydrators and soothing agents.
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Six peptidesa multi-peptide blend for elasticity-focused care
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Copper tripeptide-1one of the best-known peptides in the blend
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Hyaluronic acidhydration
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Niacinamide & adenosinesupport tone and smoothness
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Allantoin & N-acetylglucosaminesoothing and skin-conditioning
Peptide prep bounce
How to use
Boost after cleansing
01Right after cleansingUse it as your toner step.
02Pat in 2–3 pumpsDispense a few drops and pat gently over the face.
03Continue the routineFollow with serum and moisturizer.
Both, in practice: COSRX calls it a serum but describes a toner-like first step.
Can I use it with retinol?
Yes, peptides generally pair well with retinoids; apply the booster first.
Do copper peptides clash with vitamin C?
Some people prefer to use them at different times of day to be safe.
Who should be careful
Stop using it if you notice stinging or redness that does not fade.
Copper peptides and strong acids are often kept in separate routines to limit irritation.
Patch test first: apply a little to the inner forearm or behind the ear and wait 24 to 48 hours before using it on your face.
Ready to try it?
COSRX The 6 Peptide Skin Booster Serum, 150 ml. Available on Amazon.ca, with checkout, delivery and returns handled by Amazon.
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Frequently asked questions
Can I buy COSRX The 6 Peptide Skin Booster Serum – 150 ml on Melaxin.ca?
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How do I use it?
Follow the directions printed on the packaging or the retailer listing, as instructions can vary by market and formula version. Patch-test first if your skin is sensitive.
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Buy from the brand’s official store or listings sold by Amazon or well-reviewed sellers, and check the packaging, batch code and seal on arrival. Our authenticity guide explains the red flags.
Which product should I start with?
Start with one product that targets your main concern, patch test it for 24 to 48 hours, then add steps slowly. Our order-of-use and beginner routine guides show where each step goes.
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