What does vitamin C serum do to your face?

Author: Prof. Elbert Bogisich PhD  |  Last update: Thursday, June 19, 2025

Vitamin C is a potent antioxidant that helps defend against free radicals. When used consistently, a face serum with vitamin C can play a powerful role in your anti-aging skincare regimen by delivering skin-brightening benefits and improving the appearance of fine lines, dark spots, and uneven skin tone.

Should you use vitamin C serum everyday?

Most experts recommend using vitamin C serum every other day, but it is safe to use it daily. Apply it as a moisturizer in the morning, but don't use it before bedtime.

Does vitamin C serum really help your face?

Yes, vitamin C serums are known for their effectiveness in skincare. They can provide numerous benefits, such as brightening the skin, reducing the appearance of dark spots and hyperpigmentation, boosting collagen production, and protecting against environmental damage.

What are the disadvantages of vitamin C serum?

Vitamin C for skin can make the skin dry, so follow up with a moisturizer. Some people may face some allergic reaction to the ingredients present in the serum. If you have acne-prone skin you may experience breakouts after using Vitamin C serum. Always do a patch test before use.

How long does it take for vitamin C serum to work?

You will usually notice a reduction in dark spots within two weeks of using this product. After one month of usage, your skin will experience increased collagen production and also stay protected against sun damage.

What does Vitamin C ACTUALLY DO? | Dr Davin Lim

Should I leave vitamin C serum overnight?

Using vitamin C serum at night reduces dark spots and blemishes, fades hyperpigmentation, and brightens your skin tone. Want a glowing and spot-free complexion? Try the vitamin C overnight serum to limit dark spot reappearance, repair, and relax your skin while you slumber.

Do I need moisturizer after vitamin C serum?

Should you use vitamin C serum before or after moisturiser and sunscreen? Dermatologists recommend you apply vitamin C serum before you apply moisturiser and sunscreen. The steps for application are [2]: Use a gentle cleanser to remove any makeup or free radicals from your skin.

What should you not use after vitamin C serum?

Beta Hydroxy Acids

So that salicylic acid of yours should not be mixed with your vitamin C serum. It won't be able to help you with discoloration, collagen production, or protect you from UV rays. Additionally, combining the two can cause irritation and dryness.

How many drops of vitamin C serum should I use?

Vitamin C serum up to 20% concentration can be applied twice daily both morning (AM) and night (PM) right after cleansing and hydration or toning. Take 2-3 drops of Vitamin C serum on your fingertips and gently apply them in your face and neck in circular motions.

Can you overdo vitamin C serum?

3. Using too much or too little: ‍Too much vitamin C serum can cause skin irritation and too little may not provide the desired results.

What happens if I stop using vitamin C serum?

When you stop using Vitamin C, your skin's natural defenses may weaken, making it more susceptible to environmental damage. Over time, this can accelerate signs of aging and cause an overall decline in skin health and appearance.

What is the best vitamin C serum according to dermatologists?

What Is The Best Vitamin C Serum, According To A Dermatologist? Engelman recommends two vitamin C serums in particular: the SkinCeuticals C E Ferulic and the SkinMedica Vitamin C+E Complex.

What does toner do for your face?

what does toner do for your face? It removes any dirt or grime that remains after cleansing, but does so gently. And toners help prep your skin for those products you're putting on after — think serums, moisturizers, night creams, etc. The outer layer of your skin is a mixture of oils and proteins.

What shouldn't you mix with vitamin C?

Skincare ingredients not to mix with vitamin C

Vitamin C, AHAs (glycolic acid), and BHAs (salicylic acid) are acidic in nature. Layering them together can lower the skin's pH, making it more acidic. When skin pH goes off balance, it becomes a recipe for skin irritation, redness, and peeling.

Is vitamin C better in the morning or night?

Nearly across the board, dermatologists recommend incorporating vitamin C serum into your morning routine as opposed to using it at night.

Why am I getting pimples after using vitamin C serum?

Acids, vitamin C serums and retinoids can all cause purging. Purging is an initial acne breakout that can occur when you're starting a new active skincare product—one that causes your skin cells to turn over more quickly.

How to know if vitamin C serum is working?

However, the best way to know, according to Dr Kiran, is to notice the difference in your skin. “If you use the serum for a month and find your skin to be bright, clear, less sensitive to the sun, and you are feeling fresher, then vitamin C is definitely working,” she said.

What is the best drugstore vitamin C serum?

Our favorite drugstore vitamin C serum is the L'Oreal Paris Revitalift Vitamin C Face Serum, thanks to the nongreasy texture and how well it smooths and brightens the skin. If you have acne-prone skin, we recommend the CeraVe Skin Renewing Vitamin C Serum since it helps lighten post-acne marks.

Is 10% vitamin C serum too much?

Between 5-20% concentration of Vitamin C (L-Ascorbic acid) is common, with 10-15% being a good middle ground for most people. Focus on your skin's sensitivity and choose a product formulated for your needs. Consulting a dermatologist can help you determine the right amount for you.

What cancels out vitamin C serum?

In other cases, mixing can destabilize or cancel out the benefits of the antioxidant. Here are some ingredients to never mix with vitamin C: Alpha Hydroxy Acids (AHAs): Lactic Acid, Malic Acid, Glycolic Acid, Citric Acid, Tartaric Acid.

Should I put vitamin C on my neck?

Skin benefits of vitamin C

One study showed that daily use of a vitamin C formulation for at least three months improved the appearance of fine and coarse wrinkles of the face and neck, as well as improved overall skin texture and appearance.

What are the mistakes while using vitamin C serum?

Incorrect layering: You should always use vitamin C with sunscreen to avoid the adverse effects of photosensitivity and at the right point in the skincare routine – after cleansing and before moisturising. Mixing other ingredients : Avoid mixing vitamin C with certain ingredients, like benzoyl peroxide and retinol.

How long do you leave vitamin C serum on your face?

How do I use vitamin C serum on my face? After cleansing and toning, apply a few drops of vitamin C serum directly to your face, massaging it evenly over your skin. Wait 5 to 10 minutes for it to absorb before applying moisturiser to seal in the serum.

Which vitamin C serum is best?

18 Best Vitamin C Serum in India:
  • Light Up Beauty's Blaze Vitamin C Serum. ...
  • Klairs Freshly Juiced Vitamin Drop. ...
  • The Ordinary Ascorbic Acid 8% + Alpha Arbutin 2% ...
  • Plum Bright Years Vitamin C Serum. ...
  • Mcaffeine Naked & Raw Coffee Face Serum. ...
  • Re'equil 18% Vitamin C Face Serum.
  • Neutrogena Rapid Wrinkle Repair Vitamin C Serum.

What is the best face moisturizer?

Some of the best brands include:
  • CeraVe: Known for their gentle, dermatologist recommended moisturizers.
  • La Roche-Posay: Offers a wide range of affordable skincare products, including non-comedogenic moisturizers.
  • Kiehl's: Known for their effective, high end skincare products.

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