Last updated: November 2026 · Written by the Tivora team · Reading time: about 7 minutes
Vitamin C serum is one of the most popular skincare products in India, promised to give "glow", fade dark spots and slow ageing. Some of that is true; some is marketing. This guide explains what vitamin C actually does, which type and strength to look for, how to use it without irritation, and why it works best with sunscreen, not instead of it.
Quick answer
Vitamin C serum is an antioxidant that helps brighten dull skin, fade dark spots and support collagen. Look for L-ascorbic acid at 10% to 20%, or a stable derivative if your skin is sensitive. Apply a few drops in the morning after cleansing, then moisturiser, then SPF 50 PA++++. Vitamin C boosts your sunscreen's protection, but it is not a sunscreen.
What does vitamin C do for skin?
1. Brightens and evens tone
Vitamin C slows tyrosinase, the enzyme that makes melanin. Over time this helps dull skin look brighter and dark spots look lighter. A review in the Journal of Clinical and Aesthetic Dermatology notes its effect is gentler than prescription treatments like hydroquinone, but it's much better tolerated.
2. Protects against sun damage (alongside sunscreen)
Sunlight creates "free radicals" in skin that damage collagen and trigger pigmentation. Sunscreens block most UV but not all of these free radicals. Vitamin C helps neutralise them, which is why dermatologists recommend it in the morning under sunscreen.
3. Supports collagen
Your skin needs vitamin C to build and stabilise collagen, the protein that keeps skin firm. Small studies show topical vitamin C can improve the look of fine lines over a few months.
4. Gives a healthy "glow"
Brighter tone plus fewer dark spots usually means skin looks fresher and more even. See our guide to getting glowing skin.
Which vitamin C should you choose?
| Type | Pros | Cons |
|---|---|---|
| L-ascorbic acid | Most studied and most effective form | Can sting sensitive skin; oxidises (turns orange) quickly |
| Derivatives (e.g. sodium ascorbyl phosphate, magnesium ascorbyl phosphate, ascorbyl glucoside, ethyl ascorbic acid) | More stable and gentler | Usually weaker evidence than L-ascorbic acid |
Strength: the review found products generally need more than 8% to work, and above 20% adds little except more irritation. 10% to 20% L-ascorbic acid is the sweet spot; beginners and sensitive skin can start at 10% or with a derivative.
Packaging: choose an opaque, air-tight bottle, and store it away from heat and sunlight. If the serum turns dark orange or brown, it has oxidised and is less effective.
How to use vitamin C serum
- Morning: cleanse and pat skin dry.
- Apply 3 to 4 drops to face and neck. Wait about a minute.
- Moisturise.
- Finish with sunscreen, SPF 50 PA++++, two finger-lengths for face and neck. See when to apply sunscreen.
New to vitamin C? Start every other morning for the first two weeks. Mild tingling at first is common with L-ascorbic acid; stinging, redness or itching that doesn't settle means you should stop or switch to a gentler form.
What to pair it with (and what to be careful with)
- Great with: sunscreen, vitamin E and ferulic acid (they help stabilise vitamin C), niacinamide, hyaluronic acid, alpha arbutin.
- Use at a different time: retinol and strong exfoliating acids (AHA/BHA). Keep vitamin C for the morning and those for night, to avoid irritation.
Read niacinamide benefits and alpha arbutin vs niacinamide vs vitamin C.
Vitamin C is not a sunscreen
This is the most common mistake. Vitamin C helps with sun damage, but it doesn't block UV rays the way sunscreen does. Using vitamin C without sunscreen on Indian skin can still lead to tanning and new dark spots. Think of vitamin C as a support act and sunscreen as the main protection. Read why daily sunscreen matters.
How long does vitamin C take to work?
Many people notice brighter-looking skin within 3 to 4 weeks. Dark spots and fine lines usually take 8 to 12 weeks or longer, and only if you're using sunscreen every day.
Our pick to finish your vitamin C routine
Tivora BrightShield SPF 50 PA++++ is a lightweight sunscreen that sits well over serums, with no white cast on Indian skin. It adds three brightening actives, Alpha Arbutin, Tyrostat and Melanostatin, to support the work your vitamin C is doing. It's dermatologically tested and certified non-irritant. 50 ml for ₹615, or two for ₹999.
Tivora BrightShield SPF 50 PA++++
Lightweight daily sunscreen with Alpha Arbutin, Tyrostat and Melanostatin. No white cast. ✓ Dermatologically tested · Non-irritant
₹615 · 2 for ₹999 · Free shipping
Frequently asked questions
Should I use vitamin C in the morning or at night?
Morning is best, under sunscreen, because it helps protect against daytime free-radical damage. Night is fine too if morning use irritates your skin.
Is vitamin C serum good for oily skin?
Yes. Choose a lightweight, water-based serum.
Can I use vitamin C with niacinamide?
Yes. Most modern formulas can be used together.
Why does my vitamin C serum sting?
L-ascorbic acid is acidic. Mild tingling can be normal at first. If it burns or causes redness, stop and try a lower strength or a gentler derivative.
Does vitamin C remove tan?
It can help fade tan and dark spots gradually, but sunscreen is what stops the tan from coming back. See how to remove tan from face.
The bottom line
Vitamin C serum brightens, helps fade dark spots and supports collagen, but it works best as a partner to sunscreen, never a replacement. Choose 10% to 20% L-ascorbic acid or a gentle derivative, use it in the morning, and always finish with SPF 50 PA++++. Try Tivora BrightShield as your final step.
This article is for general information and is not medical advice. If you have a skin condition, speak to a qualified dermatologist.
Sources
- Al-Niaimi F, Chiang NYZ. Topical vitamin C and the skin: mechanisms of action and clinical applications. J Clin Aesthet Dermatol, 2017.
- American Academy of Dermatology: Sunscreen FAQs
