Yon-Ka Paris Alpha Contour

Yon-Ka Paris Alpha Contour

Efficacy75/100IrritancyHigh

Works for

Moisturizing
Urea, Glycerin + 5 more
Works well
What the product description says
“It helps the elimination of aging cells, replenishes moisture to skin, works to actively reduce”
Source: SkincareRX

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": glycerin, sodium hyaluronate.

When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. If the air is dry, humectants can speed up the moisture loss from the skin. This is why it is a good idea to use another product on top of this one to help "seal in" the moisture (look for ingredients like dimethicone, squalane, oils and butters).

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: urea

UreaHero· HumectantEffect: HighNaturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations~1.2–1.8%
GlycerinKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant~4.1–6.2%
Saccharum officinarum extractKey activeEffect: HighSugar extract that helps attract water to the upper layer of the skin~0.2–0.8%
Hydrolyzed soy proteinKey active· HumectantEffect: MediumHelps attract water to the upper layer of the skin. Might have some anti-aging, anti-oxidant, and skin lightening properties, but solid evidence is missing~0.2–0.75%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.05–0.25%
Propylene glycol· HumectantEffect: LowHelps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating~2–3%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~1.7–2.5%
Anti-aging
No ingredient credited for this claim
Not delivered
What the product description says
“This renewing gel, with active fruit acids, is formulated to gently reduce wrinkles and fine lines.”
Source: Skinstore

This product does not contain ingredients that are able to reduce fine lines and wrinkles or help with skin elasticity, but it can improve the look of the skin temporarily through moisturization. Well-moisturized skin might also be able to repair the sun damage better.

Can it cause trouble?

Irritancy
5 strong irritants: Citrus aurantium dulcis fruit extract, Citrus limon fruit extract + 3 more — patch-test recommended
High risk
We flagged 15 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Propylene glycolHelps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritatingHigh~2–3%est.
Anthemis nobilis flower extractA plant extract that one one hand, can contain compounds that can help calm down skin irritation, but, on the other hand, its other compounds (especially fragrant ones) can themselves be irritatingHigh~0.45–1.1%est.
Citrus aurantium dulcis fruit extractA plant extract that is used as a fragrance. Can be irritating and lead to photosensitivityHigh~0.15–0.65%est.
Citrus limon fruit extractUsed as a fragrance. Can be irritating and cause photosensitivityHigh~0.15–0.5%est.
Lavandula angustifolia oilAn essential oil. Potential allergen and can be irritating. It has some anti-bacterial propertiesHigh~0.1–0.4%est.
LinaloolA fragrance. Can be irritatingHigh~0.05–0.25%est.
Mentha piperita oilUsed as a fragrance and can be irritatingHigh~0.01–0.1%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~1.7–2.5%est.
Oleth-20Helps oil and water mix togetherMedium~1.5–2.2%est.
ChlorphenesinA preservativeMedium~0.16–0.32%est.
Vaccinium myrtillus fruit extractA plant extract that might help neutralize free radicals in skin, but research on its efficacy in skin is lackingMedium~0.4–0.95%est.
Tetrasodium edtaHelps to stabilize the product formulationMedium~0.3–0.7%est.
Acrylates/c10-30 alkyl acrylate crosspolymerMaintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix togetherMedium~0.1–0.5%est.
Sodium dehydroacetateA preservativeMedium~0.1–0.4%est.
Acer saccharum extractA plant extract that contains small percentage of AHAs. Is unlikely to have any skin benefit due the small concentration of the active compoundsMedium~0.1–0.3%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

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Ingredients

Filter by role to see what each ingredient is doing.

Water~40–60%
Formula
Irritation risk
Low

Plain old water

More about Water
Glycerin~4.1–6.2%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant

More about Glycerin
Propanediol~3.4–5.2%
Formula
Irritation risk
Low

Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin

More about Propanediol
Carbomer~2.6–4%
Formula
Irritation risk
Low
Works for
Cleansing

Helps create a thicker or gel-like product texture. It is not a surfactant but can be used in gentle cleansing formulations

More about Carbomer
Propylene glycol~2–3%
Irritant · high
Irritation risk
High
Works for
Moisturizing

Helps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating

More about Propylene glycol
Caprylyl glycol~1.7–2.5%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps preserve products and creates a nice product texture

More about Caprylyl glycol
Oleth-20~1.5–2.2%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Oleth-20
Urea~1.2–1.8%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingExfoliation

Naturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations

More about Urea
Chlorphenesin~0.16–0.32%
Irritant · medium
Irritation risk
Medium

A preservative

More about Chlorphenesin
Sodium hydroxide~0.85–1.25%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Anthemis nobilis flower extract~0.45–1.1%
Irritant · high
Irritation risk
High
Works for
Reduces irritationAnti-inflammatory

A plant extract that one one hand, can contain compounds that can help calm down skin irritation, but, on the other hand, its other compounds (especially fragrant ones) can themselves be irritating

More about Anthemis nobilis flower extract
Vaccinium myrtillus fruit extract~0.4–0.95%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A plant extract that might help neutralize free radicals in skin, but research on its efficacy in skin is lacking

More about Vaccinium myrtillus fruit extract
Peg-35 castor oil~0.4–0.9%
Formula
Irritation risk
Low
Works for
Cleansing
More about Peg-35 castor oil
Hydrolyzed sweet almond protein~0.35–0.75%
Formula
Tetrasodium edta~0.3–0.7%
Irritant · medium
Irritation risk
Medium

Helps to stabilize the product formulation

More about Tetrasodium edta
Saccharum officinarum extract~0.2–0.8%
Key active
Irritation risk
Low
Works for
Moisturizing

Sugar extract that helps attract water to the upper layer of the skin

More about Saccharum officinarum extract
Hydrolyzed soy protein~0.2–0.75%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-oxidationAnti-inflammatoryEvens skin tone

Helps attract water to the upper layer of the skin. Might have some anti-aging, anti-oxidant, and skin lightening properties, but solid evidence is missing

More about Hydrolyzed soy protein
Citrus aurantium dulcis fruit extract~0.15–0.65%
Irritant · high
Irritation risk
High

A plant extract that is used as a fragrance. Can be irritating and lead to photosensitivity

More about Citrus aurantium dulcis fruit extract
Citrus limon fruit extract~0.15–0.5%
Irritant · high
Irritation risk
High

Used as a fragrance. Can be irritating and cause photosensitivity

More about Citrus limon fruit extract
Acrylates/c10-30 alkyl acrylate crosspolymer~0.1–0.5%
Irritant · medium
Irritation risk
Medium

Maintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix together

More about Acrylates/c10-30 alkyl acrylate crosspolymer
Sodium dehydroacetate~0.1–0.4%
Irritant · medium
Irritation risk
Medium

A preservative

More about Sodium dehydroacetate
Lavandula angustifolia oil~0.1–0.4%
Irritant · high
Irritation risk
High

An essential oil. Potential allergen and can be irritating. It has some anti-bacterial properties

More about Lavandula angustifolia oil
Acer saccharum extract~0.1–0.3%
Irritant · medium
Irritation risk
Medium

A plant extract that contains small percentage of AHAs. Is unlikely to have any skin benefit due the small concentration of the active compounds

More about Acer saccharum extract
Linalool~0.05–0.25%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Sodium hyaluronate~0.05–0.25%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin

More about Sodium hyaluronate
Sodium benzoate~0.05–0.2%
Formula
Irritation risk
Low

A preservative

More about Sodium benzoate
Mentha piperita oil~0.01–0.1%
Irritant · high
Irritation risk
High

Used as a fragrance and can be irritating

More about Mentha piperita oil
Mimosa tenuiflora bark extract~0.01–0.1%
Formula
Ingredient list view

Water, Glycerin, Propanediol, Carbomer, Propylene glycol, Caprylyl glycol, Oleth-20, Urea, Chlorphenesin, Sodium hydroxide, Anthemis nobilis flower extract, Vaccinium myrtillus fruit extract, Peg-35 castor oil, Hydrolyzed sweet almond protein, Tetrasodium edta, Saccharum officinarum extract, Hydrolyzed soy protein, Citrus aurantium dulcis fruit extract, Citrus limon fruit extract, Acrylates/c10-30 alkyl acrylate crosspolymer, Sodium dehydroacetate, Lavandula angustifolia oil, Acer saccharum extract, Linalool, Sodium hyaluronate, Sodium benzoate, Mentha piperita oil, Mimosa tenuiflora bark extract

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Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
Yon-Ka ParisAlpha ContourYOUR PRODUCTTONYMOLYFloria Brightening Peeling GelSkinCeuticalsHydrating B5 SerumU BeautyThe Barrier Bioactive Treatment
Match—62%62%61%
Price—$9.07$16.97$192.66
Shared key ingredients—3 of 43 of 44 of 4
Key difference—Lactic AcidCalcium PantothenateLactobionic Acid
Irritancy High High Low Medium
Drying alcohol————
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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 16 studies and safety reviews.

  1. 1
  2. 2
  3. 3
    Propylene Glycolpubmed.ncbi.nlm.nih.gov
  4. 4
  5. 5
    Topical urea in skincare: A reviewpubmed.ncbi.nlm.nih.gov
  6. 6
Yon-Ka Paris Alpha Contour
Yon-Ka ParisAlpha Contour

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