SkinCeuticals
Glycolic 10 Renew Overnight
Glycolic acid treatment
Glycolic 10 Renew Overnight Product Details
Nighttime glycolic acid treatment delivers a true 10% glycolic acid value to promote cellular turnover for glowing, healthy-looking skin.
Glycolic 10 Renew Overnight is formulated with a free acid value of 10% glycolic acid, allowing it to work at a true 10% concentration, which is optimal in promoting effective exfoliation and natural cell turnover. Free acid value refers to the true strength of a glycolic acid product and is affected by both the concentration of acid and the pH of the formula. This potent glycolic night treatment is synergistically blended with 2% phytic acid to promote skin clarity and brightness and a triple action-soothing complex to help support the skin barrier. Proven tolerable for nightly use, Glycolic 10 Renew Overnight improves the appearance of skin texture and tone to promote a bright complexion and glowing skin.
How to Use Glycolic 10 Renew Overnight
1 Prep + Dispense
Shake before use. Some skin types may require time to acclimate to glycolic acid treatment. In these cases, precondition skin for this glycolic night treatment by limiting initial use to once every other evening.
2 Apply + Complete
Apply an even, pea-sized layer over entire face and neck. After one week, increase to every evening or as advised by a skincare professional. Avoid eye area. Always use with a daytime antioxidant and sunscreen the following day.
Three Essentials. One Radiant Routine.
C E Ferulic® — Elevate your daily routine with antioxidant care that helps defend against environmental stressors and promotes brighter, more radiant-looking skin.
P-TIOX — Refine your complexion with a peptide serum that helps improve the appearance of expression lines and uneven texture for smoother-looking skin.
Triple Lipid Restore 2:4:2 — Complete your routine with nourishing lipid care that leaves skin feeling soft, smooth, and comfortably moisturized.

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BEFORE YOU START
How to actually use it
Do I need more than one antioxidant serum?
No. Pick the one matched to your skin type and use it every morning. Layering two vitamin C serums does not add protection — it mainly adds irritation, and doubles what you spend.
In what order do I apply it?
Thinnest to thickest. Cleanse, then the antioxidant serum on dry skin, then any corrective, then moisturiser, then sunscreen. Give the serum a minute to settle before the next layer.
Morning or evening?
Antioxidants go in the morning — their job is to absorb the UV and pollution damage your skin meets during the day. Retinol and acid-based correctives go in the evening, when skin is not also defending itself.
Can I use vitamin C with retinol?
Yes, and they work well together — just not in the same layer. Use the antioxidant serum in the morning and the retinol at night. If your skin is reactive, start with alternate evenings before going nightly.
How should I store it?
Capped, upright, away from direct light and heat. A pale gold tint is normal over time; a deep amber or brown colour means the L-ascorbic acid has oxidised and the bottle should be replaced. Do not decant it into a travel pot.
How long before I notice a difference?
The antioxidant protection starts with the first application, but you will not see it — that is the point of it. Visible changes in tone and texture generally take eight to twelve weeks of consistent morning use.
My skin is sensitive — where do I start?
Patch test behind the ear for two days, then introduce the serum every other morning for the first week before moving to daily. If stinging persists, stop and speak to a dermatologist.
Is sunscreen still necessary if I use an antioxidant?
More so. UV exposure consumes the antioxidants sitting in your skin, so the serum buys you time rather than replacing protection. An antioxidant in the morning without sunscreen is an unfinished routine.













