Professional-Grade Skincare
iS Clinical Vitamin C Serums
iS Clinical's award-winning vitamin C serums brighten, firm and defend — led by the cult Super Serum Advance+.
Unsure which strength or form suits your skin? Our Academy guide to vitamin C serums compares L-ascorbic acid with the gentler derivatives, so you can weigh potency against tolerance before you buy, while the iS Clinical brand explainer covers the formulation thinking behind Super Serum Advance+.
![iS Clinical Pro Heal Sample-Skintique Retail]()
![iS Clinical Pro Heal Sample-Skintique Retail]()
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![iS Clinical Poly-Vitamin Serum-Serum-15ml-Skintique Retail]()
![iS Clinical Poly-Vitamin Serum-Serum-15ml-Skintique Retail]()
iS Clinical
iS Clinical Poly-Vitamin Serum | Hydrating Face Serum | 30ml
£72.00Unit price /Unavailable -
![iS Clinical Super Serum Advance +-Serum-Skintique Retail]()
![iS Clinical Super Serum Advance +-Serum-Skintique Retail]()
iS Clinical
iS Clinical Super Serum Advance+ | Vitamin C Serum | 15ml & 30ml
£157.00Unit price /Unavailable -
![iS Clinical Genexc Serum-Serum-Skintique Retail]()
![iS Clinical Genexc Serum-Serum-Skintique Retail]()
iS Clinical
iS Clinical GeneXC Serum | Vitamin C Serum | 15ml & 30ml
£169.00Unit price /Unavailable
Frequently asked questions
Which iS Clinical vitamin C serum should I start with?
Which iS Clinical vitamin C serum should I start with?
Super Serum Advance+ is the iS Clinical hero and the best all-rounder, with 15% L-ascorbic acid, copper tripeptide growth factor and hyaluronic acid to firm and brighten the look of skin while softening the appearance of scars. If your skin is reactive or redness-prone, start with Pro-Heal Serum Advance+ instead; for the strongest anti-ageing formula, step up to GeneXC.
How and when do I apply a vitamin C serum?
How and when do I apply a vitamin C serum?
Apply four to five drops to clean, dry skin each morning before moisturiser and SPF, because vitamin C paired with daily sunscreen is where you see brightening. Give any L-ascorbic acid formula eight to twelve weeks of consistent morning use before judging results. Keep the bottle closed and out of sunlight so the vitamin C stays potent.
What makes GeneXC the most advanced option?
What makes GeneXC the most advanced option?
GeneXC carries 20% L-ascorbic acid alongside Extremozymes and growth-factor technology, making it the most concentrated vitamin C in the line for visible firmness and radiance. Because it is this strong, introduce it every other morning for the first week, then move to daily. It layers cleanly under Eclipse SPF 50+.
I have sensitive skin. Which vitamin C is gentlest?
I have sensitive skin. Which vitamin C is gentlest?
Poly-Vitamin Serum is the gentlest choice here, blending vitamins A, B5, C and E with hyaluronic acid, so it suits sensitive, mature or recently treated skin that finds stronger acids uncomfortable. It hydrates as it brightens and layers under any of the richer serums. Use it morning and night when your skin wants extra vitamin support.
Can I use two vitamin C serums at once?
Can I use two vitamin C serums at once?
Do not stack two L-ascorbic acid serums together; choose one vitamin C as your morning brightener and let it do the work. If your skin feels tight, layer a hydrating pass of Hydra-Cool Serum underneath Super Serum Advance+, then seal with moisturiser. This keeps the routine potent without overloading the barrier.
Not sure which product is right for you?
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