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Vitamin C Serum uses a stabilised form of vitamin C — 3-O-ethyl ascorbic acid — for dark spots, hyperpigmentation and a dull, uneven tone. It brightens and helps defend the skin against daily environmental stress.
Smoothed over face and neck each morning after cleansing, always followed by SPF.
Key benefits
Brightens and evens tone
Stabilised vitamin C (3-O-ethyl ascorbic acid) targets dark spots and uneven tone for a more radiant complexion.
Fades the look of hyperpigmentation
Helps soften the appearance of sun spots and post-blemish marks over time.
Antioxidant daytime defence
Vitamin C helps defend against the free-radical stress that dulls the skin.
Boosts everyday radiance
Restores glow to skin that has become dull and tired.
Proven results
A stabilised vitamin C serum built on 3-O-ethyl ascorbic acid, for a brighter, more even tone.
Stabilised vitamin C (3-O-ethyl ascorbic acid) — at its studied dose
Measured with a 10% 3-O-ethyl ascorbic acid formulation, twice daily versus placebo. It brightens by modulating tyrosinase (the pigment-making enzyme) and works as a daytime antioxidant.
*Ingredient-level evidence: the figure reflects a clinical study of 3-O-ethyl ascorbic acid at its studied dose, not the finished serum. Best applied each morning under SPF. Individual results may vary.
How to use
- Apply in the morning after cleansing
- Smooth 3-4 drops over face and neck
- Always follow with SPF
Loved & recommended
Vitamin C is the best-evidenced brightening antioxidant we have — the challenge is always stability. A stabilised form used in the morning under SPF is the right way to run it, and for dark spots and dullness it is a reliable daily brightener.
Elena HartDermatologist
Why it is recommended
It uses a stabilised vitamin C for daily brightening and antioxidant defence.
Key ingredients
Stabilised vitamin C (3-O-ethyl ascorbic acid)
An ether-stabilised vitamin C that resists oxidation and converts to vitamin C in the skin — a brightening antioxidant that targets dark spots and uneven tone while helping defend against daily stress. Read the full guide →
Supporting antioxidants
Aloe and citrus botanicals work alongside the vitamin C to boost radiance and defence.
Humectants
Glycerin and hyaluronic acid keep the lightweight serum comfortable and hydrated on the skin. Read the full guide →
Full ingredients list is available here. For more details you can reach out to our team.
The science behind the formula
Vitamin C is one of the best-studied brightening antioxidants in skincare — but pure vitamin C is notoriously unstable. This serum uses 3-O-ethyl ascorbic acid, an ether-stabilised form that resists oxidation on the shelf and then converts to vitamin C in the skin.
It brightens by modulating tyrosinase, the key enzyme in melanin production, and neutralises free radicals as a daytime antioxidant — which is why it works best applied each morning under SPF. Its strongest, best-evidenced benefit is on tone and dark spots; it is gentler and more pH-flexible than pure L-ascorbic acid.
FAQs
Morning or night?
Morning, after cleansing and before SPF — vitamin C boosts your daytime antioxidant defence.
Can I use it with retinol?
Yes, but many people prefer vitamin C in the morning and retinol at night.
Will it help with dark spots?
It targets the look of dark spots and uneven tone with consistent use. Always pair with daily SPF.
Do I still need sunscreen?
Yes — vitamin C complements SPF but does not replace it. Sunscreen is essential every morning.
How much should I use?
Three to four drops smoothed over the face and neck.
What if it starts to change colour?
Store it cool and out of light. A slight deepening over time is normal; discard it if it turns dark orange or brown.
Is it suitable for sensitive skin?
Introduce it gradually and patch test first; if your skin is very reactive, start every other morning.
How should I store it?
Keep it somewhere cool and out of direct sunlight with the cap closed, so the actives stay stable.
Is it safe to use during pregnancy?
If you are pregnant or breastfeeding, we recommend checking with your doctor before starting any new active skincare.
How is it shipped, and can I return it?
Shipping is free on every order with no minimum, and there is a 30-day, no-questions-asked return guarantee if it is not right for you.
Vitamin C Serum
Stabilised vitamin C (3-O-ethyl ascorbic acid) — for dark spots, hyperpigmentation and dull, uneven tone Full details
Suitable for
- Dark spots and uneven tone
- Dull skin that has lost its glow
- Morning use, under SPF
How to use
- Apply in the morning after cleansing
- Smooth 3-4 drops over face and neck
- Always follow with SPF
Guide to layering
Since 1998
Pioneers of copper-peptide skincare
Clinically studied
Formulated at studied ingredient doses
Free shipping
On all orders, no minimum
30-day guarantee
No-questions-asked returns
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Real Photos from Our Customers
Real people, real skin — shared by customers using Vitamin C Serum.
Customers love this serum for brightening and improving skin texture. Reviews highlight it "transformed my skin" by fading dark spots, acne scars, and hyperpigmentation. Shoppers praise its lightweight formula that "absorbs quickly" and provides a "youthful glow." Many noted visible improvements in skin tone and radiance, calling it a "must have for skincare."
- Transformed my skin! Faded acne scars and evened out skin tone. Complexion looks radiant.
- Spots seem to be fading while being easy on my skin
- Love it as a skin serum to brighten and improve skin texture.
I am addicted to my fabulous routine I use this serum 1st to nourish and lubricate my skin. Then I apply the blue copper firming elasticity repair. People never believe me when I tell them I'm 69!
Great product!
Excellent Product a must have for skincare
Excellent Product a must have for skincare
Excellent product a must have for skincare
Excellent product a must have for skincare
Great product, spots seem to be fading while being easy on my skin
Always used vitamin C to boost my immune system - love it as a skin serum to brighten and improve skin texture.
Always used vitamin C to boost my immune system - love it as a skin serum to brighten and improve skin texture.
The only products that produce 100% satisfaction are yours. I now send them to my daughters. Thank you.
The only products that produce 100% satisfaction are yours. I now send them to my daughters. Thank you.
I absolutely love the vitamin C serum. I can see a very positive difference in my skin!
I absolutely love the vitamin C serum. I can see a very positive difference in my skin!
The Vitamin C Serum has transformed my skin! It has faded my acne scars and evened out my skin tone. My complexion looks clearer and more radiant than ever before. I can't thank this serum enough for the amazing results.
The Vitamin C Serum is a brightening elixir for my tired skin! It has rejuvenated my complexion, reducing the appearance of dark spots and giving me a fresh, youthful glow. I'm thrilled with the results!
This Vitamin C Serum is the ultimate skin brightener. It has visibly reduced the appearance of hyperpigmentation and dark spots, leaving my skin looking more even-toned and radiant. I'm in love with the results!
The Vitamin C Serum is a powerhouse for protecting my skin. It has strengthened my skin's defense against environmental stressors, and I've noticed a significant reduction in skin dullness. I highly recommend it!
This Vitamin C Serum is a game-changer for all ages. It has helped improve my skin's texture and even out my skin tone. It's lightweight and absorbs quickly, making it perfect for daily use.
The Vitamin C Serum has given my skin a radiant boost! It has brightened my complexion and reduced the appearance of dark spots. I love the youthful glow it gives me!
The Vitamin C Serum has transformed my skin! It has faded my acne scars and evened out my skin tone. My complexion looks clearer and more radiant than ever before. I can't thank this serum enough for the amazing results.
The Vitamin C Serum is a powerhouse for protecting my skin. It has strengthened my skin's defense against environmental stressors, and I've noticed a significant reduction in skin dullness. I highly recommend it!
This Vitamin C Serum is the ultimate skin brightener. It has visibly reduced the appearance of hyperpigmentation and dark spots, leaving my skin looking more even-toned and radiant. I'm in love with the results!
The Vitamin C Serum has given my skin a radiant boost! It has brightened my complexion and reduced the appearance of dark spots. I love the youthful glow it gives me!
This Vitamin C Serum is a game-changer for all ages. It has helped improve my skin's texture and even out my skin tone. It's lightweight and absorbs quickly, making it perfect for daily use.
The Vitamin C Serum is a brightening elixir for my tired skin! It has rejuvenated my complexion, reducing the appearance of dark spots and giving me a fresh, youthful glow. I'm thrilled with the results!
The Vitamin C Serum has transformed my skin! It has faded my acne scars and evened out my skin tone. My complexion looks clearer and more radiant than ever before. I can't thank this serum enough for the amazing results.
This Vitamin C Serum is a game-changer for all ages. It has helped improve my skin's texture and even out my skin tone. It's lightweight and absorbs quickly, making it perfect for daily use.
The Vitamin C Serum is a powerhouse for protecting my skin. It has strengthened my skin's defense against environmental stressors, and I've noticed a significant reduction in skin dullness. I highly recommend it!
The Vitamin C Serum is a brightening elixir for my tired skin! It has rejuvenated my complexion, reducing the appearance of dark spots and giving me a fresh, youthful glow. I'm thrilled with the results!
This Vitamin C Serum is the ultimate skin brightener. It has visibly reduced the appearance of hyperpigmentation and dark spots, leaving my skin looking more even-toned and radiant. I'm in love with the results!
The Vitamin C Serum has given my skin a radiant boost! It has brightened my complexion and reduced the appearance of dark spots. I love the youthful glow it gives me!
The Vitamin C Serum has transformed my skin! It has faded my acne scars and evened out my skin tone. My complexion looks clearer and more radiant than ever before. I can't thank this serum enough for the amazing results.
