

VC15 Serum
A truly even tone. Not just a glow.
A serum designed to address two of the most common concerns when looking in the mirror: uneven skin tone and photoaging.
Pure vitamin C is effective, but it is also unstable. It oxidizes easily, turns orange, and is often formulated at a very acidic pH. This makes it more difficult to combine with other active ingredients and less tolerable for daily use.
In VC15 Serum, all vitamin C is stabilized. That is why the pH is adjusted to ~5.5, which is compatible with the skin and frequent use. This allows us to incorporate 2% tranexamic acid, the active ingredient of choice for reducing spots and marks.
- 15% stable vitamin C: Brightening and antioxidant support to protect against photoaging.
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2% tranexamic acid: evens out skin tone and improves dark spots and blemishes.
Unlike acid serums, which have usage restrictions, when you can use this product every day, the benefits build up over time: week by week, your skin looks more even-toned.
A 15% concentration of functional vitamin C falls squarely within the range known to promote collagen production, thereby helping to reduce the signs of sagging skin, such as fine lines and wrinkles.
Airless packaging and nitrogen-flushed packaging to preserve the product's properties as much as possible. 30 ml.
Ingredients
A minimalist, fragrance-free formula designed to preserve as much vitamin C as possible.
- 3-O-Ethyl Ascorbic Acid: 10%. A stable form of vitamin C.
- Ascorbyl Glucoside: 5%. A stable form of vitamin C.
- Tranexamic Acid: 2%. An active ingredient that helps reduce dark spots and blemishes.
- Pentylene glycol + propanediol: 5%. Moisturizers that soften the skin's stratum corneum to promote the absorption of active ingredients.
INCI: 3-O-Ethyl Ascorbic Acid, Ascorbyl Glucoside, Pentylene Glycol, Tranexamic Acid, 1,3-Propanediol, Glycereth-26, Phenoxyethanol, Hydroxyethylcellulose, Ethylhexylglycerin, Sodium Phytate
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"The best vitamin C serum I've ever tried"
Dr. Paz Cerdá.
Purchase results.
What it does (and what it doesn't).
What to expect:
- It protects the skin from the leading cause of aging: oxidative stress caused by UV radiation. It protects cells and essential proteins such as collagen.
- Quick improvement in brightness.
- Gradual lightening of brown marks (post-acne or post-irritation). Visible improvement usually begins within 4–8 weeks with consistent use.
- With melasma, improvements are slower: reduced contrast and smaller patches, with a more even skin tone. It requires consistency.
- Gradual softening of the color and edges of sunspots.
The complete elimination of melasma and solar lentigines is usually beyond the scope of cosmetic products and requires dermatological treatment.

Photoaging
When the skin is exposed to UVA radiation, unstable molecules called reactive oxygen species or free radicals are generated. These molecules damage key components of the skin , such as cell membrane lipids, structural proteins like collagen, and DNA.
Vitamin C breaks this chain of oxidation by neutralizing free radicals, thereby protecting the skin from photoaging.
Image: A cell undergoing progressive damage due to the action of reactive oxygen species (free radicals).

Use it with SPF 50
Vitamin C does not replace sunscreen; rather, it complements it to provide comprehensive protection against photoaging. And tranexamic acid is the gold standard for lightening dark spots. However, sun exposure is the main cause of dark spots reappearing.
Without strong protection, UV rays continue to age the skin, and the improved complexion you wake up with each morning is lost as soon as you step outside.
Recommended morning routine:
VC15 Serum + SPF 50.
This way, you help the serum work effectively, and the benefits really build up over time.
Frequently Asked Questions About VC15
The serum goes a long way; just 2–3 pumps are enough to cover your face and neck.
First, cleanse, then apply the serum, and finally the SPF 50 moisturizer. After applying the serum, wait about 30 minutes before applying the sunscreen.
Ideally, only in the mornings.
It is highly compatible with retinoids because the serum does not have an extremely acidic pH.
You can use vitamin C in the morning and a retinoid at night (the simplest routine).

↳ Skin cell observed with electron microscopy.
Science brings it to life
Science is what brings our serum to life. The means at our disposal go beyond conventional cosmetics and are the reason why the results are different from what you have experienced so far.