Why is topical vitamin C important for skin health?

We hear a lot about the benefits of vitamin C for the skin, but what’s less well known is just how vitamin C works, and how it can be integrated into a skincare routine for seriously glowing results.

A potent antioxidant, vitamin C really is one of the best scientifically backed topical ingredients out there. From firming and brightening to environmental protection, there's not much it can’t do.

Read on to find out more about the benefits of vitamin C, and why we think it’s essential for complexion health.

What Is Vitamin C?

Topical vitamin C is a scientifically backed ingredient that falls into the antioxidant category. Its main function is to defend against free radicals, which are ever-present in the environment (air pollution and cigarette smoke are the main offenders), as well as in our bodies, usually as a by-product of the metabolism. Free radicals destabilise our cells, triggering photo-ageing, collagen breakdown, pigmentation irregularities and general skin damage: vitamin C is a key player in the fight against free radicals, and will keep your complexion brighter, bouncier and more youthful for longer.

What Are The Benefits Of Vitamin C For The Skin?

Not only does vitamin C prevent environmental stress by neutralising free radicals, it can also correct the look of dark spots, acne scarring and pigmentation.

Vitamin C plays an essential role in the production of collagen and elastin, too, (which is why it’s recognised as a brilliant anti-ager). Collagen and elastin work together to provide our skin with structure and support, like a scaffolding system beneath the surface. But age and environmental assaults break it down over time, resulting in lines, wrinkles and sagging. Topical vitamin C slows this process, as well as stimulating new collagen for renewed skin firmness, plumpness and bounce.

The Best Form Of Vitamin C For Skin Health?

L-ascorbic acid is the most common form of vitamin C used in skincare. It’s widely considered the most biologically active (not to mention, the most widely researched), so it produces seriously impressive results.

But L-ascorbic acid is notoriously unstable, so needs to be expertly formulated for it to work effectively. That’s why ours comes in a powder format, which ensures it retains stability and potency, right up until the moment it’s applied to the skin (more on this formula below).

Thanks to innovations in skincare, we now have natural sources of the ingredient at our disposal as well. One of our favourites is Kakadu plum, an Aussie native that’s rich in natural vitamin C, which also possesses superior brightening capabilities, and can be tolerated by all complexions, even sensitive skin.

How To Use Vitamin C In Your Skin Care Routine?

Because vitamin C fights off environmental damage, it’s great used in the morning underneath your moisturiser and sunscreen. Of course, you can apply it in the evening as well, but just be mindful of what you’re mixing it with.

Here’s a breakdown on those ingredients that play nice with vitamin C, and those that don’t:

Pairs well with:

  • Hyaluronic acid
  • Niacinamide
  • Retinol and other vitamin A derivatives*
  • SPF filters

Avoid using it with:

  • Leave-on acids (including glycolic, salicylic and lactic – however rinse-off acids are fine).
  • Copper peptides**

*Generally speaking, this would be a no, but Skinstitut Vitamin C Powder and our Retinol Serum have been specifically formulated to be used together… smart!

**In the case of copper peptides and vitamin C, the two destabilise each other, so keep them separate.

The Best Vitamin C Skincare Buys:

If you’re looking for our top recommendations for vitamin C products, look no further than the list below:

Vitamin C 100% Powder

This 100% pure L-Ascorbic Acid powder is a game-changer. Not only does it deliver glow in spades, it works to correct pigmentation and dark spots while boosting collagen production to diminish the look of lines and wrinkles. Try adding a rice-sized sprinkle to your moisturiser or sunscreen, or into a complimentary serum. Added bonus? The powder format means it stays potent and stable – how good is that!

Moisture Defence Normal

If you want a subtle antioxidant boost with a side of hydration, Moisture Defence Normal contains native hero and Vitamin C-rich Kakadu Plum. When paired with your sunscreen, it’s a top choice for skin that’s protected all day long.

Expert Restore Niacinamide Replenishing Cream

This formula also contains Kakadu Plum for antioxidant protection, alongside Niacinamide to balance and soothe. It’s a little richer in texture, making it a treat for dry skin in need of TLC. 

Multi-Active Mist

Not only is Multi-Active Mist super refreshing, it’s also formulated with a gentle Vitamin C derivative (Sodium Ascorbyl Phosphate) for extra environmental protection. Spritz it onto freshly cleansed skin (beneath your serum), and whenever you need a boost throughout the day.

Want to explore some other brilliant brightening formulations? Check out our range of cosmeceutical solutions right here.

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13/11/2025
Arja
Australia
Absolutely love it!
Glycolic Scrub 14%
11/11/2025
Angela
Australia
Leaves my skin feeling clean and fresh.
Glycolic Scrub 14%
11/11/2025
Angela
Australia
Love it. Soaks in beautifully. Not greasy at all.
Age Defence SPF 50+
05/11/2025
Vera
Australia
love it
Vitamin C Ceramide Moisturiser
04/11/2025
Jan
Australia
Love this product !
Repair Balm
04/11/2025
Karen N.
Australia
Love this moisturiser, I have been using it for years. I have dry skin and I am 60 years old. It’s incredibly beautiful and hydrating in the skin and well priced.
Moisture Defence – Ultra Dry Skin
03/11/2025
danielle H.
Australia
My skin feels and looks amazing. Love this product!
Even Blend Serum
02/11/2025
Kim P.
Australia
I love these products
Moisture Defence – Normal Skin
02/11/2025
Rachel P.
Australia
I have been using the skinstitute retinol serum for two months now and can happily say I am very impressed. I have noticed improvements in my fine lines, overall less breakouts around my T-zone, more even skin texture and tone.
Retinol Serum
02/11/2025
Lisa W.
Australia
I love this my face look and feels so good
Enzymatic Micro Peel
01/11/2025
June M.
Australia
I use it am & pm. My skin is softer & holds the moisturiser well after using this serum. Highly recommend it.
Expert Reset Skin-Firming Peptide Serum
01/11/2025
Julie
Australia
Helps nourish heal and sooth my skin
Repair Balm
01/11/2025
Kylie P.
Australia
Great for night time. I wanted a lux eye cream for night routine. It works!
Ultra Firming Eye Neck Cream
01/11/2025
Jenny L.
Australia
I like it, not to greasy!
Vitamin C Ceramide Moisturiser
01/11/2025
Kristy W.
Australia
Love the cream. It feels great on my skin. I wear it daily.
Expert Restore Niacinamide Replenishing Cream
31/10/2025
MAREE
Australia
I am looking my new limited edition scrub. Feels & looks great on my skin. Before & after. Definitely look polished.
Limited Edition Glycolic Scrub 14%
28/10/2025
Alisha
Australia
Absolutely love this scrub smells amazing and leaves my skin feeling fresh and polished I have to make sure my son doesn’t use it to much because he loves it and the smell and he is only 13 but loving the results to help with his acne to. Please keep it as a regular range!!
Limited Edition Glycolic Scrub 14%
26/10/2025
Michelle
Australia
Love love love this
Limited Edition Glycolic Scrub 14%
26/10/2025
Michelle
Australia
Now this it great
The Discovery
26/10/2025
Michelle
Australia
Love it
Moisture Defence – Normal Skin
25/10/2025
Jocelyn
Australia
My skin feels very smooth after use…the texture of the scrub id perfect
Limited Edition Glycolic Scrub 14%
25/10/2025
Marcelle
Australia
Excellent skin is soft snd feels super clean and refreshed !
Limited Edition Glycolic Scrub 14%
16/10/2025
Levana
Australia
Love love love
Limited Edition Glycolic Scrub 14%
12/10/2025
Dani G.
Australia
I’ve been a loyal user of the 14% Glycolic Scrub for 11 years! So I couldn’t resist trying this limited edition. Within just a few days, I noticed a visible difference and my skin feels smoother, looks brighter, and even some older scars are starting to fade. Amazing!! My new favourite! Can it be a...I’ve been a loyal user of the 14% Glycolic Scrub for 11 years! So I couldn’t resist trying this limited edition. Within just a few days, I noticed a visible difference and my skin feels smoother, looks brighter, and even some older scars are starting to fade. Amazing!! My new favourite! Can it be a permanent product?
Limited Edition Glycolic Scrub 14%
02/10/2025
sonia f.
Australia
LOVE TEXTURE AND SKIN LOOKS RADIANT
Vitamin C Ceramide Moisturiser
02/10/2025
Jenny R.
Australia
I love this cream, its subtle fragrance, the glide on the skin and the lasting hydration it provides. I use it morning and night and it allows a easy layering for sunscreen in the day and my Vit A cream at night. 10/10
The Edit
01/10/2025
Alexia R.
Australia
Non greasy, great sun protection, smells wonderful-can not fault this staple
Age Defence SPF 50+
01/10/2025
Melanie S.
Australia
Absolutely Love this product! I have been using the Gentle Cleanser for years now and have never been disappointed
Gentle Cleanser
01/10/2025
Tina M.
Australia
I started using this after I suffered a reaction from a different branded product and it was very soothing. I’ve continued to use it since then as I can’t imagine using anything else now.
Expert Restore Niacinamide Replenishing Cream
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Renee W.
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Great product, have been using morning and night and my skin texture and appearance has improved. I will keep going with this as I feel my skin looks better with each use!
Vitamin C Ceramide Moisturiser
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