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Collagen Glow Booster Serum is a milky serum in a slim airless pen, which Medicube says keeps outside air away from the serum. At 15ml it is small enough to carry with you.

Key ingredients

• Milk protein extract (1%): from cow’s milk, which Medicube says gives a lighter texture than goat’s milk.
• Hydrolysed collagen and elastin: printed on the pen.
• Niacinamide: vitamin B3, which Medicube includes for tone and texture.
• PDRN (sodium DNA), ceramide NP and adenosine, with proteoglycan and hexapeptide-2.

How to use

• Use morning and night on clean, dry skin.
• Take off the cap, twist the button anticlockwise to unlock, then click 2 to 4 times.
• Press the serum into the face, neck and décolleté.
• Replace the cap and twist the button clockwise to lock it.
• You can also add one click to your usual serum or cream.

Good to know

• 15ml airless pen.
• Contains salmon-derived PDRN, milk protein extract and fragrance (parfum).
• Medicube lists it as dermatologist-tested and low-irritation, and free of parabens, silicones, alcohol and gluten.
• Medicube’s own shops sell it as Collagen Glow Booster Milk Serum.
• Patch-test on a small area before first use.