Vitamin C Serum

Vitamin C Serum uses a stabilised form of vitamin C, 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 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.

What to expect

With daily morning use, most people notice:

  • A brighter, more radiant complexion
  • Dark spots and marks look softened over time
  • A more even-looking tone
  • Skin that looks less dull and tired

Descriptive of the typical experience with consistent use. Individual results 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

A brightening antioxidant that targets dark spots and uneven tone while helping defend against daily stress.

Supporting antioxidants

Work alongside vitamin C to boost radiance and defence.

Humectants

Keep the lightweight serum comfortable on the skin.

Always refer to the packaging for the full INCI list.

The science behind the formula

Vitamin C is one of the best-studied brightening antioxidants in skincare. Stability is the challenge — this serum uses a stabilised form so it stays effective, and works best applied in the morning under SPF.

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 — for dark spots, hyperpigmentation and a dull, uneven tone Full details

★★★★★5.074 reviews
Benefits BrightenEvenProtect
Size
Approx. 56 uses per bottle
Earn 1200 points with this purchase. Join the Osmotics Hub to collect points on every order and redeem them against future purchases. Learn more

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

Step 1: Cleanse
Revive & Renew Cleanser
Revive & Renew Cleanser
$80.00$55.00 / 3.4 oz
Step 2: Treat
Vitamin C Serum
Vitamin C Serum
$120.00 / 1.0 oz
Step 3: Eyes
Step 4: Moisturise
Blue Copper 5 PRIME Face Cream
Blue Copper 5 PRIME Face Cream
$160.00$144.00 / 1.7 oz
Step 5: Support
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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TextureRich creamRich creamLight eye creamFluid eye serum
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Key ingredientsMatrixyl 3000 (palmitoyl peptides)Copper peptideHyaluronic acidMatrixyl 3000 (palmitoyl peptides)Menofit (artichoke-leaf peptides)Uplevity (acetyl tetrapeptide-2)Copper peptideMatrixyl 3000 (palmitoyl peptides)Uplevity (acetyl tetrapeptide-2)Copper peptideHyaluronic acidEyeseryl (acetyl tetrapeptide-5)HaloxylCopper peptideHyaluronic acid

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Customers praise this serum for brightening skin and reducing dark spots. Reviews highlight its ability to even skin tone, fade acne scars, and provide a youthful glow. Many note it "absorbs quickly" and is "lightweight" for daily use. Shoppers appreciate how it nourishes skin and improves texture, with one saying "People never believe me when I tell them I'm 69!"

  • People never believe me when I tell them I'm 69!
  • Spots seem to be fading while being easy on my skin
  • The only products that produce 100% satisfaction
Complexion (positive)Glow (positive)Spots (positive)Skin (positive)Texture (positive)
  • 5 stars: 74 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
e
elisa h.
Love it

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!

D
Diana Z.
Great product!

Great product!

D
Deborah

Excellent Product a must have for skincare

D
Deborah D.
Excellent Product a must have

Excellent Product a must have for skincare

D
Deborah D.

Excellent product a must have for skincare

D
Deborah D.
Excellent product a must have

Excellent product a must have for skincare

J
Joann G.
Vitamin. C serum

Great product, spots seem to be fading while being easy on my skin

J
Joann G.
Vitamin. C serum

Great product, spots seem to be fading while being easy on my skin

W
Waltra L.
Power of C

Always used vitamin C to boost my immune system - love it as a skin serum to brighten and improve skin texture.

W
Waltra L.
Power of C

Always used vitamin C to boost my immune system - love it as a skin serum to brighten and improve skin texture.

N
Nancy D.
Always top quality

The only products that produce 100% satisfaction are yours. I now send them to my daughters. Thank you.

N
Nancy D.
Always top quality

The only products that produce 100% satisfaction are yours. I now send them to my daughters. Thank you.

K
Kimberly D.
Vitamin C Serum

I absolutely love the vitamin C serum. I can see a very positive difference in my skin!

K
Kimberly D.
Vitamin C Serum

I absolutely love the vitamin C serum. I can see a very positive difference in my skin!

O
Olivia T.
A Skin Transformation with Vitamin C

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.

M
Mily W.
A Brightening Elixir for Tired Skin

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!

H
Harper E.
The Ultimate Skin Brightener

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!

E
Emma B.
A Powerhouse for Skin Protection

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!

H
Harper S.
A Skincare Essential for All Ages

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.

L
Lily J.
A Radiant Complexion with a Vitamin C Boost

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!

O
Olivia T.
A Skin Transformation with Vitamin C

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.

E
Emma B.
A Powerhouse for Skin Protection

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!

H
Harper E.
The Ultimate Skin Brightener

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!

L
Lily J.
A Radiant Complexion with a Vitamin C Boost

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!

H
Harper S.
A Skincare Essential for All Ages

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.

M
Mily W.
A Brightening Elixir for Tired Skin

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!

O
Olivia T.
A Skin Transformation with Vitamin C

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.

H
Harper S.
A Skincare Essential for All Ages

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.

E
Emma B.
A Powerhouse for Skin Protection

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!

M
Mily W.
A Brightening Elixir for Tired Skin

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!

H
Harper E.
The Ultimate Skin Brightener

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!

L
Lily J.
A Radiant Complexion with a Vitamin C Boost

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!

For external cosmetic use only. Osmotics products are cosmetics intended to improve the appearance of skin; they are not intended to diagnose, treat, cure or prevent any disease. Customer reviews reflect individual experiences and are not a guarantee of results; individual results may vary.