Works for:
based on ingredients and %- Evens skin tone
- Anti-aging
- Moisturizing
- Anti-oxidation
Doesn't work for:
based on ingredients and %- Anti-blemish
- Exfoliation
Can it cause trouble?
- Irritation risk: high
- Comedogenic risk ingredients: 0
Key actives
Product Summary
"Yon-Ka Paris - Serum C20" could be helpful for: Evens skin tone, Anti-aging and Moisturizing, but its actives are not the most effective or are not well-studied.
Works for
Does not work for
Anti-oxidation
This product contains antioxidants (ascorbyl tetraisopalmitate) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
A plant oil with high content of volatile compounds that can irritate the skin. Can be used as a fragrance. Has anti-bacterial properties and might help neutralize free radicals on the surface of the skin
An emollient that helps soften the skin
A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.
Anti-aging
What does the product description say?
Our antioxidant face serum helps defend against environmental skin aging and supports the body’s collagen synthesis to help firm skin.
Source: N/A
This product contains ascorbyl tetraisopalmitate. This ingredient might be able to help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness, but there is not enough evidence that it actually works.
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Evens skin tone
What does the product description say?
Composed of 99.9% ingredients of natural origin, this dark spot serum features Ascorbyl Tetraisopalmitate, an all-natural, oil-soluble form of Vitamin C derived from green science.
Source: N/A
The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually works: ascorbyl tetraisopalmitate.
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Moisturizing
What does the product description say?
Apricot Kernel Oil, rich in phytosterols, helps moisturize and comfort skin.
Source: N/A
This product can help soften the skin and reduce its moisture loss with emollients and occlusives: helianthus annuus seed oil, prunus armeniaca kernel oil.
Keep in mind that this product does not contain effective ingredients to attract water to the upper layer of the skin. This is why an additional product with humectants like glycerin or hyaluronic acid can be helpful (apply it before this product for the best results).
A great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function
An emollient that helps soften the skin
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Anti-blemish
Effective ingredients missing or their concentration is too low.
Exfoliation
This product does not contain effective exfoliating ingredients. It might be able to deliver physical exfoliation, that is scrub off some of the dead cells on the surface of the skin. We do not recommend physical exfoliation, because it is not uniform (some bits of skin can get exfoliated too much while others not at all). It can also traumatize the skin and aggrevate acne and other skin conditions.
How honest is this product?
| Promise | Can it deliver? |
|---|---|
| Anti-aging | |
| Moisturizing | |
| Evens skin tone | |
| Exfoliation | |
| Anti-blemish |
Total Promises Fulfilled score: 45/100.
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Potential irritants
Comedogenic ingredients
No comedogenic ingredients detected
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| Product | Similarity | Price | Irritancy |
|---|---|---|---|
 Yon-Ka Paris Serum C20 | Current | $168.00 | |
Essano Advanced Brightening Vitamin C Serum | 59% | $33.99 | |
 Pai Skincare Stabilized Vitamin C 20% Brightening Booster | 58% | $19.00 | |
PharmaClinix Anti Agex Serum | 58% | $74.99 | |
 Ren Skincare Face Keep Young and Beautiful Firming and Smoothing Serum | 55% | - | |
 Joanna Vargas Rescue Serum | 54% | $120.00 |
Key Actives
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
An emollient that helps soften the skin
A great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function
Potential irritants
A common frangrance that can easily irritate skin, especially if exposed to air, light or heat
Used as a fragrance. It can be irritating and cause photosensitivity
An essential oil. Potential allergen and can be irritating. It has some anti-bacterial properties
An essential oil used as a fragrance. Can be irritating
A plant oil with high content of volatile compounds that can irritate the skin. Can be used as a fragrance. Has anti-bacterial properties and might help neutralize free radicals on the surface of the skin
An aromatic blend of unspecified and possibly irritating ingredients
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.
Comedogenic ingredients
We couldn't find any comedogenic ingredients in this product
All ingredients
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
A common frangrance that can easily irritate skin, especially if exposed to air, light or heat
Used as a fragrance. It can be irritating and cause photosensitivity
A great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function
An essential oil. Potential allergen and can be irritating. It has some anti-bacterial properties
An essential oil used as a fragrance. Can be irritating
A plant oil with high content of volatile compounds that can irritate the skin. Can be used as a fragrance. Has anti-bacterial properties and might help neutralize free radicals on the surface of the skin
An aromatic blend of unspecified and possibly irritating ingredients
A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.
Ingredient list view
Brassica napus extract, Ascorbyl tetraisopalmitate, Prunus armeniaca kernel oil, Limonene, Citrus aurantium dulcis oil, Helianthus annuus seed oil, Curcuma longa callus extract, Punica granatum leaf cell extract, Lavandula angustifolia oil, Pelargonium graveolens leaf oil, Rosmarinus officinalis leaf oil, Cupressus sempervirens oil, Thymus vulgaris flower/leaf oil, Parfum, Tocopheryl acetate, Citral, Linalool, Geraniol, Citronellol
- Assessment of penetration of Ascorbyl Tetraisopalmitate into biological membranes by molecular dynamics
- Stability evaluation of tocopheryl acetate and ascorbyl tetraisopalmitate in isolation and incorporated in cosmetic formulations using thermal analysis
- A new lipophilic pro-vitamin C, tetra-isopalmitoyl ascorbic acid (VC-IP), prevents UV-induced skin pigmentation through its anti-oxidative properties
- New lipophilic pro-vitamin C, tetra-isopalmitoyl ascorbic acid (VC-IP), suppresses senile lentigo through controlling of melanocytes-keratinocytes interaction
- Safety Assessment of Citrus-Derived Peel Oils as Used in Cosmetics
- Oxidized citrus oil (R-limonene): A frequent skin sensitizer in Europe
- Air oxidation increases skin irritation from fragrance terpenes
- Effect of Olive and Sunflower Seed Oil on the Adult Skin Barrier: Implications for Neonatal Skin Care
- Topically Applied Sunflower Seed Oil Prevents Invasive Bacterial Infections in Preterm Infants in Egypt
- Effect of topically applied lipids on surfactant-irritated skin
- Impact of topical oils on the skin barrier: possible implications for neonatal health in developing countries
- Assessment report on Rosmarinus officinalis L., aetheroleum and Rosmarinus officinalis L., folium
- Screening of plant extracts for antimicrobial activity against bacteria and yeasts with dermatological relevance
- Occupational contact dermatitis due to essential oils
- The in vitro antimicrobial activity and chemometric modelling of 59 commercial essential oils against pathogens of dermatological relevance
- Antimicrobial and Antioxidant Properties of Rosemary and Sage (Rosmarinus officinalis L. and Salvia officinalis L., Lamiaceae) Essential Oils
- Chemical Composition, Plant Genetic Differences, Antimicrobial and Antifungal Activity Investigation of the Essential Oil of Rosmarinus officinalis L.
- Annex I: Clinical evidence regarding sensitisation to individual fragrance chemicals and to natural extracts