Vitamin C Serum for Face & Sensitive Skin

Vitamin C Serums & Brightening Skincare

Brighten dulless skin and fade dark spots with Vitamin C, one of the most researched ingredients in skincare, and one of the most misunderstood.

Our serums use Ascorbyl Glucoside, a stable form of Vitamin C that's gentler than pure L-Ascorbic Acid and less likely to sting sensitive skin. You get the brightening without the trade-off.

New to Vitamin C? Read our guide to what Vitamin C actually does for your skin, or take the Skincare Quiz for a personalised routine.

FAQs

Our askINKEY digital skincare advisors are experts with deep product knowledge, here to answer your most asked questions and make skincare as simple as possible.

Morning, in most cases. Vitamin C is an antioxidant, which means it helps defend your skin against the environmental stress it meets during the day, pollution and UV exposure in particular. Applying it in the morning puts that protection in place before you need it. Apply it to clean skin after cleansing and before moisturiser, then always follow with SPF. Vitamin C doesn't replace sunscreen, but the two work well together. If you'd rather use yours at night, that's fine too. Consistency matters more than timing.
Cleanse and pat skin dry. Apply 2–3 drops to your fingertips and press gently over your face and neck. Wait 30 seconds to absorb. Follow with moisturiser. In the morning, finish with SPF. Apply to dry rather than damp skin — it slows absorption slightly, which is what you want with an active. Once a day is plenty.
Yes, they're one of the easiest pairings in skincare. Hyaluronic acid draws water into the skin; vitamin C works on brightness and antioxidant defence. Different jobs, no conflict. Apply the thinner formula first. Usually that means hyaluronic acid, then vitamin C, then moisturiser.
Vitamin C is generally considered one of the more suitable actives during pregnancy and breastfeeding — unlike retinoids, which are typically avoided. We know this matters, so we've made it easy to check: use the Pregnancy and breastfeeding filter on this page to see which of our products are suitable. That said, everyone's circumstances differ. Please check with your GP, midwife or dermatologist before introducing any new active during pregnancy or while breastfeeding.
Vitamin C itself doesn't usually cause breakouts, but a few things can make it look that way. Purging vs. reacting: small bumps in areas you normally break out in, settling within 2–4 weeks, are likely purging. Spots in new areas, or irritation that worsens, means the formula isn't agreeing with you — stop and reassess. Concentration matters. A high-strength formula on skin that isn't used to actives can trigger irritation that looks like breakouts. If you're new to vitamin C or have sensitive skin, start gentler. Check the rest of your routine. Heavy occlusive products layered over a serum are a more common culprit than the serum itself.
Once daily is the sweet spot. More often doesn't brighten faster — it just increases the chance of irritation. If your skin is sensitive or new to actives, start every other day for two weeks, then build up. Give it time. Most people notice a difference in brightness and tone around the 8–12 week mark with consistent daily use.
Our 15% Vitamin C + EGF Serum uses Ascorbyl Glucoside — a stable derivative of vitamin C that converts to pure L-Ascorbic Acid once it's on the skin. Pure vitamin C is famously unstable: it oxidises quickly and can be harsh. Ascorbyl Glucoside is more stable, gentler, and less likely to sting — which makes it a better fit for sensitive or reactive skin. We tell you exactly what's in the bottle and why, because you should be able to choose your skincare on the facts.

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Vitamin C Serums & Brightening Skincare

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15% Vitamin C + EGF Serum

Vitamin C Serum

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Vitamin C Serums & Brightening Skincare

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15% Vitamin C + EGF Serum

Vitamin C Serum

FAQs

Should you use vitamin C serum in the morning or at night?

How do you apply vitamin C serum?

Can you use hyaluronic acid and vitamin C together?

Can you use vitamin C serum while pregnant or breastfeeding?

Can vitamin C serum cause breakouts?

How often should you use vitamin C serum?

What form of vitamin C is in INKEY's serums?

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