Sothys Cosmeceutique RX Ultra C Dermobooster

Sothys Cosmeceutique RX Ultra C Dermobooster

Efficacy75/100IrritancyHigh

Works for

Anti-aging
Retinyl palmitate, Tocopherol + 2 more
May help
What the product description says
“Reduces signs of aging.”
Source: Skinstore

This product contains retinyl palmitate. 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.

Retinyl palmitateKey activeEffect: MediumThree steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect~0.55–0.85%
TocopherolEffect: Low, below effective dosePure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.1–0.15%
Ascorbyl tetraisopalmitateUnder-dosedA 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)~4.4–5.4%
Lactic acidUnder-dosedAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~0.15–0.25%
Evens skin tone
Retinyl palmitate, Ascorbyl tetraisopalmitate + 1 more
May help
What the product description says
“Lipo-solulable Vitamin C slows down melanogenesis to brighten skin and lighten hyperpigmentation, encourage cell metabolism and the production of collagen.”
Source: Skinstore

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually works: retinyl palmitate.

Retinyl palmitateKey activeEffect: MediumThree steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect~0.55–0.85%
Ascorbyl tetraisopalmitateUnder-dosedA 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)~4.4–5.4%
Lactic acidUnder-dosedAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~0.15–0.25%

Can it cause trouble?

Irritancy
3 strong irritants: Alcohol denat., Retinyl palmitate + 1 more — patch-test recommended
High risk
We flagged 13 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Alcohol denat.Produces temporary toning effect. Can help dissolve other ingredients or preserve productsHigh~8.2–10.1%est.
Retinyl palmitateThree steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effectHigh~0.55–0.85%est.
Hamamelis virginiana extractA plant extract that can help calm down inflammation in skin. Can, however, itself be irritatingHigh~0.1–0.2%est.
Ascorbyl tetraisopalmitateA 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)Medium~4.4–5.4%est.
ChlorphenesinA preservativeMedium~0.16–0.32%est.
Hydroxypropyl guarUsed to create a thicker product consistency and stabilize emulsionsMedium~1.7–2%est.
Simmondsia chinensis seed oilSoftens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.Medium~1.3–1.6%est.
Tocopheryl acetateA 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.Medium~0.7–1.05%est.
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymerA gelling agent that thickens the product consistency and leaves the skin with a velvety finishMedium~0.45–0.7%est.
Acrylates/c10-30 alkyl acrylate crosspolymerMaintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix togetherMedium~0.3–0.55%est.
Disodium edtaStabilizes the product formulationMedium~0.2–0.35%est.
Polysorbate 60Helps oil and water mix togetherMedium~0.2–0.35%est.
Lactic acidAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)Medium~0.15–0.25%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~45–55%
Formula
Irritation risk
Low

Plain old water

More about Water
Alcohol denat.~8.2–10.1%
Irritant · high
Irritation risk
High

Produces temporary toning effect. Can help dissolve other ingredients or preserve products

More about Alcohol denat.
Ascorbyl tetraisopalmitate~4.4–5.4%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidationEvens skin toneAnti-agingMoisturizing

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)

More about Ascorbyl tetraisopalmitate
Butylene glycol~3.1–3.8%
Formula
Irritation risk
Low
Works for
Moisturizing

Used to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin

More about Butylene glycol
Glycerin~2.5–3%
Formula
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
Chlorphenesin~0.16–0.32%
Irritant · medium
Irritation risk
Medium

A preservative

More about Chlorphenesin
Hydroxypropyl guar~1.7–2%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Used to create a thicker product consistency and stabilize emulsions

More about Hydroxypropyl guar
Hydrogenated polyisobutene~1.6–1.9%
Formula
Irritation risk
Low
Works for
Moisturizing

Used to improve the product consistency and soften the upper layer of the skin

More about Hydrogenated polyisobutene
Simmondsia chinensis seed oil~1.3–1.6%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Softens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.

More about Simmondsia chinensis seed oil
Carbomer~0.95–1.15%
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
Tocopheryl acetate~0.7–1.05%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

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.

More about Tocopheryl acetate
Retinyl palmitate~0.55–0.85%
Key activeIrritant · high
Irritation risk
High
Works for
Evens skin toneAnti-blemishAnti-agingExfoliation

Three steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect

More about Retinyl palmitate
Sodium hyaluronate~0.55–0.8%
Formula
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
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer~0.45–0.7%
Irritant · medium
Irritation risk
Medium

A gelling agent that thickens the product consistency and leaves the skin with a velvety finish

More about Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer
Propylene glycol dicaprylate/dicaprate~0.45–0.7%
Formula
Acrylates/c10-30 alkyl acrylate crosspolymer~0.3–0.55%
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
Squalane~0.35–0.6%
Formula
Irritation risk
Low
Works for
Moisturizing

An oil naturally present in skin. Works as an emollient to soften the skin and form a protective layer on its surface without a greasy feeling.

More about Squalane
Disodium edta~0.2–0.35%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Polysorbate 60~0.2–0.35%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Polysorbate 60
Lactic acid~0.15–0.25%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneExfoliationMoisturizingAnti-aging

An exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)

More about Lactic acid
Hamamelis virginiana extract~0.1–0.2%
Irritant · high
Irritation risk
High
Works for
Anti-inflammatory

A plant extract that can help calm down inflammation in skin. Can, however, itself be irritating

More about Hamamelis virginiana extract
Sorbitan isostearate~0.1–0.2%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Sorbitan isostearate
Tocopherol~0.1–0.15%
Formula
Irritation risk
Low
Works for
Anti-oxidationAnti-inflammatoryAnti-agingMoisturizing

Pure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself

More about Tocopherol
Ingredient list view

Water, Alcohol denat., Ascorbyl tetraisopalmitate, Butylene glycol, Glycerin, Chlorphenesin, Hydroxypropyl guar, Hydrogenated polyisobutene, Simmondsia chinensis seed oil, Carbomer, Tocopheryl acetate, Retinyl palmitate, Sodium hyaluronate, Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, Propylene glycol dicaprylate/dicaprate, Acrylates/c10-30 alkyl acrylate crosspolymer, Squalane, Disodium edta, Polysorbate 60, Lactic acid, Hamamelis virginiana extract, Sorbitan isostearate, Tocopherol

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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
SothysCosmeceutique RX Ultra C DermoboosterYOUR PRODUCTZelensPower C - Collagen-boosting & BrighteningEssanoAdvanced Brightening Vitamin C Serumskin ingredientssk.in marvel | hydro shot
Match—59%57%56%
Price—$63.06—$75.08
Shared key ingredients—4 of 74 of 73 of 7
Key difference—Saccharomyces Ferment Lysate FiltrateBetaineCyclopentasiloxane
Irritancy High Low Medium Low
Drying alcohol Contains drying alcohol ———
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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 15 studies and safety reviews.

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Sothys Cosmeceutique RX Ultra C Dermobooster
SothysCosmeceutique RX Ultra C Dermobooster

Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

As an Amazon Associate, WIMJ earns from qualifying purchases.