Vitamin C 20%

100 Uses

Vitamin C is a powerful antioxidant that brightens and evens out skin tone. It also helps to visibly reduce sunspots and protect your skin from environmental damage and signs of aging. A superior formula with 20% pure Vitamin C.

Refill type: Actives (100 uses)


Targets: Uneven Skin Tone, Dullness, Signs of Aging, Antioxidant Support

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- Visibly reduces sun spots and evens out skin tone
- Brightening effect
- Anti-fatigue effect
- Antioxidant
- Improves overall appearance
- Enhances sunscreen

More information about this active ingredient benefits in the “Detailed info” section.

Vitamin C (Ascorbic acid) at a concentration of 20%.

Ingredients (INCI)

Dimethicone, Ascorbic Acid, Silica Dimethyl Silylate, Dimethicone/Vinyl Dimethicone Crosspolymer, Tocopherol, Helianthus Annus (Sunflower) Seed Oil.

Note: We continuously innovate to improve the quality of our formulas. Due to this, this ingredient list may differ from the one in the box of the products depending on time and region due to updates in the formulations.



Day & Night

Sunscreen is recommended during the day.

How: introduce it into the superior compartment of your Device to add its benefits to your personalized skincare.

Remember: your personalized skincare is made from 1 base and up to 4 actives.

pH ~6.5​

Sensitive Skin: Medium Compatibility

Dermatologically tested

Pregnancy & Breastfeeding Safe





Discover your base and actives
Take our skin quiz

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Product Details

Data sheet

Dull skin
Other features
No parabens

Detailed Info

Ascorbic acid is the most potent form of vitamin C, and it has multiple benefits for your skin complexion. It is possible, together with retinol, the most used skincare active ingredient in the world, and this is due to its remarkable properties as an antioxidant and to improve skin tone. 

There are different forms of Vitamin C, ascorbic acid being the most potent but also the most unstable when it is in the presence of water. To overcome this, Lesielle has developed an anhydrous formula with superior sensorial properties that, thanks to the adaptive skincare system, allows you, for the very first time, to enjoy the stability of an anhydrous formula with the great sensorial feeling of a watery moisturizer.

Lesielle tip: If you are looking for an active ingredient that is focused on improving your skin tone, Vitamine C is without any doubt, the best choice.

This formula is powered by our recognized Lesielle's Isolated Formulation.

Some of the benefits of using this Vitamin C refill in your custom skincare system:

- Brightening and Anti-fatigue effect: Ascorbic acid 20% can help you achieve a radiant and luminous glow. It inhibits the production of the enzyme tyrosinase and melanin, the pigment that causes dark spots and uneven skin tone. By fading these signs of sun damage it reveals a more uniform and youthful-looking complexion.

- Antioxidant: Ascorbic acid is a powerful antioxidant that protects your skin from free radicals, the unstable molecules that cause oxidative stress and premature aging. It neutralizes these harmful agents and prevents them from damaging your skin cells and DNA. It also enhances the effectiveness of your sunscreen by reinforcing your skin's defense against UV rays.

- Improves overall appearance due to its antioxidant properties and the effect over pigmentation.

- Enhances sunscreen: Ascorbic acid has also been shown to enhance the performance of your sunscreen. Important: vitamin C does not provide sunscreen protection but reinforces it.

You can select your active ingredients in 2 ways:

Option 1 (recommended), Take our quiz. This is the most advanced solution because it takes into account multiple factors like your lifestyle, concerns, skin type, and even active ingredient synergies.

Option 2, Select yourself. If you have some experience with skincare, you may like to decide by yourself. In this case, consider reading each active ingredient product page to get supplementary information about its properties. 
If you are starting in skincare but you like a DIY custom skincare approach, we have created a decision-tree guide to orientate you: Actives Selection Guide.pdf

NOTE: This decision tree is a simplified selection process approach. If you want the best results, we recommend you do our quiz or study the properties of the active ingredient and select the ones that, in combination (each active can have multiple effects), address your concerns in the most effective and complete way.

When to Use


Day & Night
Sunscreen is recommended during the day.

Step 1: Cleanse your skin (ideally with a non-ionic cleanser)

Step 2: Create a single dose and apply your freshly-made custom skincare.

Step 3: Apply sunscreen if required. Try to use an oil-free sunscreen to avoid adding extra oils to your skin (your base has already provided the correct amount).

All of Lesielle's products undergo dermatological testing to ensure their safety. However, since each person's skin is unique, it is always recommended to perform a patch test before using a new active ingredient in your customized skincare system. This is especially important if you have sensitive skin. Patch tests are a simple way to ensure that your skin does not have any adverse reactions to a new product.

Here's how to perform the patch test:

1. Apply a small amount of the product to your forearm.

2. Wait for 24 hours.

3. If you experience any redness, irritation, or burning sensation during the test, discontinue the use of the product and switch to an alternative solution.

Correct Sun Spots


Improves Skin Tone

Prevent Aging and Fight the Effects of Pollution

Reinforce Sun Protection"


Scientifically proven, customer approved

Product Reviews / Q&A

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All actives contain 6ml of hyper-connected active (x10 times a standard concentrated serum), and have a minimum duration of 100 uses.

Of course, the bases and actives can be removed, stored and used again for 12 months.

Although this can happen in traditional cosmetics, with Lesielle you do not have this problem. This is because the active ingredients are mixed right at the moment of application and therefore do not have time to interact with each other. This is one of the major advantages of the isolated formulation. The only thing we do not recommend is to use the same ingredient twice or to combine two exfoliating actives (range imperfections) to avoid an action that is too powerful for the skin. In addition, you will have to take into account, but this is something to be learned by each person, which ingredients your skin tolerates.

Although all our actives have passed dermatological control individually, due to their high concentration, our recommendation is that you always mix the actives with a base cream in at least a 1:2 mixture.

We must begin by clarifying that there are no active ingredients that are compatible or not with sensitive skin, since it can react to any active ingredient, no matter how mild it may be. What we can say is that there are active ingredients that are more or less likely to be compatible.

You can find the degree of compatibility with sensitive skin in the data sheet of each active ingredient. In addition, you can filter in the category of active ingredients by their expected "compatibility" and, if you are in a physical store, you will find it indicated on their packaging or corresponding box.

The main properties are those in which the active ingredient is most effective. Secondary properties are properties that, as their name indicates, are also present, but are not the most outstanding properties of the active ingredient.

We recommend always testing each active and each base separately (especially on very reactive skin) to ensure that each of the elements are compatible with the skin on which they are to be used.

Lesielle recommends the following testing process:

First, test a base with each active separately. Apply to a sensitive area of the skin (behind the earlobe or on the inside of the forearm) and wait 48h to confirm good compatibility.

Then, once the actives have been found to be compatible individually, we should test their incremental mixing, increasing the number of combined actives as follows waiting after each test 48h.


Being a base B and the actives we want to test A1, A2 and A3:

B + A1 / B + A2 / B + A3.

B + A1 + A2

B + A1 + A2 + A3

At Lesielle we value the suggestions of our customers. Please write to us in our contact area so that we can take it into account for future releases.

Powered by Isolated Formulation™

Our innovative Isolated Formulation™ process allows us to formulate actives in their ideal medium, preserving their stability and efficacy. This technique also allows us to achieve up to 10x higher concentration than traditional skincare, ensuring you get the most out of your ingredients at every moment.

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Complete your custom skin care system

Moisturize, nourish, and condition your skin with premium oils and humectants. Choose a base that best matches to your skin type and desired  moisturization level

Customize your treatment and target specific concerns. Lesielle refills contain up to 10x the highest concentrated active ingredients powered by Isolated Formulation ™ and protected by airless technology.

Get personalized skincare at the touch of a button. Place the base and up to 4 actives in your device and make a fresh dose of face cream when you need it!


Don't you know what Base and Actives you need?
Do not worry. Take our skin quiz.

Not sure which actives to pick? We’re here to help.

The skincare system for an ever evolving skin, using recognized active ingredients with scientifically proven efficacy to create treatment tailored to each day's State of Skin. 

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