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K-Beauty for you. No compromises.

K-Beauty for you. No compromises.

K-Beauty for you. No compromises.

K-Beauty for you. No compromises.

K-Beauty for you. No compromises.


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The C-Boost Hero

15% Vitamin C Brightening Serum



Powerful 15% Vitamin C serum, with hero ingredients such as Hyaluronic acid and Ascorbic acid. The antioxidant formula brightens and evens skin tone while reducing signs of aging and tackling redness as well as post inflammatory spots and scars. It is a MUST-HAVE in everyone’s beauty routine. The best of all? This product is refillable! Once you’ve finished your serum - don’t throw the packaging away! Keep it and order the refill. Less waste, happy skin, and a happier planet. Please keep in mind that the refill cannot be used without the packaging!
30ml ( £83.33/100ml )





Estimated shipping time - 2-4 working days

30-day money-back guarantee

Skin types and concerns

Skin type:

  • Dry skin
  • Sensitive skin
  • Normal skin
  • Oily/Combination skin


  • Dullness and uneven skin tone
  • Hyperpigmentation
  • Fine lines and wrinkles
  • Redness and post inflammatory spots


The scent:

  • neutral.

The texture:

  • silky and smooth yet serum-like.

Makes your skin feel:

  • revitalized and awake. You may feel some slight tingling because of the high Vitamin C %.

Makes your skin look:

  • brighter and more youthful.

Good to know

15% Vitamin C:

This serum contains a very high amount of Vitamin C - making it a super powerful product!

Innovative design:

Our innovative airless pump ensures that the serum does not get in contact with oxygen which ensures its lasting efficiency.

Sustainable refillable packaging:

To reduce plastic waste, this product comes in a glass jar and has the option to purchase an interchangeable refill tube.

To keep your product in the best condition, store in a cool, dry place away from sunlight. Best to use the product within 3 months after opening it!

Clean Beauty:

Free from Silicones - Parabens - PEGs - Microplastics - Mineral Oils - Formaldehyde - Artificial colorants - Sulfates - Drying alcohol

Dermatologist-tested and approved for all skin types, including sensitive skin.

1% for the Planet:

We donate 1% of every order to environmental projects.
The C-Boost Hero

The C-Boost Hero

15% Vitamin C Brightening Serum

How to use

How to use

How to use

How to use

Get ready to glow with our state of the art Vitamin C serum:

1. Cleanse and prep your face as usual before application to get the most out of your serum.

2. Apply 2-3 pumps of serum on your face.

3. Gently massage and tap the serum into your skin with your fingertips..

Clinical test results


of the participants agreed that their skin felt less stressed and more relaxed after 7 days of usage.


of the participants agreed that their skin immediately appeared brighter after using the serum.


of the participants agreed that their skin texture improved after 7 days of usage.


of the participants agreed that their skin felt softer after 7 days of usage.

One test was done by an approved 3rd party laboratory

Evaluation of The C-Boost Hero efficacy on the basis of consumer perception after 7 days of usage under normal conditions with 30 volunteers and with all skin types.

Ingredients we used


Vitamin C (Ascorbic Acid)


3-O-Ethyl Ascorbic Acid (Vitamin C)


Hyaluronic acid




Sea Buckthorn


Silybum Marianum Extract

Full Ingredients List

The C-Boost Hero

15% Vitamin C Brightening Serum

Aqua, Propanediol, Ascorbic Acid (Vitamin C), Betaine, 1,2-Hexanediol, Polyglycerin-3, Sodium Hyaluronate (Hyaluronic acid), 3-O-Ethyl Ascorbic Acid (Vitamin C Derivative), Diglycerin, Hippophae Rhamnoides (Sea Buckthorn) Fruit Extract, Lonicera Japonica (Honeysuckle) Flower Extract, Butylene Glycol, Caprylyl Glycol, Glycerin, Lotus Corniculatus Seed Extract, Opuntia Ficus-Indica Stem Extract, Rehmannia Chinensis Root Extract, Schisandra Chinensis Fruit Extract, Geranium Thunbergii Extract, Silybum Marianum (Milk Thistle) Extract, Tromethamine, Ethylhexylglycerin

Popular Questions

What step of the routine does this product correspond to?

The C-Boost Hero is STEP 4 of the K-Beauty routine. However, it is important to wait that The Mist Have (STEP 3), is fully absorbed by your skin before applying the serum in order to ensure full effectiveness.

Can this serum be combined with other serums?

Yes of course! The C-Boost Hero adresses specific skin concerns. You can combine it with other serums, such as The Repair Hero, if you for instance wish to replenish and hydrate the skin. This serum belongs to step 4 of the K-Beauty Routine, which is the treatment step that can incorporate multiple different products.

I've heard that combining Vitamin C with SPF can be a really beneficial power duo. Is this true?

Yes, this is true. Vitamin C is scientifically proven to boost the efficacy of your SPF, and SPF prevents the worsening of hyperpigmentation and dark spots! Combine The C-Boost Hero with The SPF BFF for an optimal team work.

Is it true that Vitamin C is better maintained in the fridge?

Yes, storing Vitamin C in the refrigerator is beneficial! This is because Vitamin C degrades more quickly when exposed to heat. To further protect its potency, we've also chosen airless packaging for our product. This type of packaging minimizes the exposure of Vitamin C to oxygen, which can also accelerate degradation. By combining refrigeration with our specialized packaging, you can ensure that your Vitamin C product maintains its effectiveness for longer!

Is it normal to have a tingling sensation after applying the serum?

This Serum has quite a high concentration of Ascorbic Acid (Vitamin C) and as a result, once you apply it on the skin you may feel some tingling. This is completely normal and should subside as you apply the next step in your skincare routine. If you feel that the burning is too strong we recommend applying a smaller amount but if it is still too strong for you, it may be best to try a product with a different Vitamin C concentration. We recommend our mask The C-Tox.

Do I need to apply this serum every day?

This serum can be applied every day! However, we recommend first doing a small patch test to see how your skin reacts, as the Vitamin C concentration is very high. Acne-prone skin for instance can potentially react more sensitive to it. We advise to check with your dermatologist in case of any doubts or reactions!

What are the benefits of Vitamin C on the skin?

Vitamin C is highly beneficial for the skin due to its potent antioxidant properties. It helps in brightening the skin, reducing signs of aging by stimulating collagen production, and protecting against damage from sun exposure and environmental pollutants. On top of that Vitamin C helps to reduce redness and post inflammatory spots. Regular use can lead to a more radiant, youthful complexion, with improved texture and reduced appearance of fine lines and wrinkles.

Will implementing more food with Vitamin C in my diet also have an effect on the skin?

Yes, incorporating Vitamin C-rich foods into your diet can positively impact your skin. Vitamin C obtained from dietary sources contributes to overall skin health by supporting the body's natural collagen synthesis, healing processes, and defense against oxidative stress. While topical application delivers direct benefits to the skin, a diet rich in Vitamin C complements these effects, promoting a holistic approach to skin health. Best, is to combine both for an optimal result!

What makes this serum different than other vitamin C serums on the market?

The C-Boost Hero stands out from other Vitamin C serums for several reasons. Firstly, it contains a high concentration of 15% Vitamin C, ensuring potent skin benefits such as brightening and anti-aging effects. Secondly, our product is designed with sustainability in mind – it's refillable, reducing environmental impact and offering a more eco-friendly skincare option. Lastly, unlike many serums that use droppers, our serum is housed in an innovative airless pump. This design choice is crucial as it prevents the serum from coming into contact with oxygen, a factor that can cause Vitamin C to lose its efficacy. The airless pump maintains the serum's potency over time, ensuring that each application is as effective as the first. These features collectively make our serum a true hero – not only in your routine but also one that stands out in the Vitamin C space.

Is it true that Vitamin C serum works even better if I apply moisturizing cream right after?

Absolutely! Applying a moisturizing cream right after your Vitamin C serum is like giving your skin a double treat. The moisturizer helps to lock in the serum, boosting its absorption and effectiveness. Your skin will feel super smooth and happy!

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