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Ren Skincare Sérum Marin Réhydratant
Ren Skincare

Ren Skincare Sérum Marin Réhydratant

Efficacy75/100IrritancyMedium
See all ingredients

Works for

Moisturizing
Glycerin, Betaine + 3 more
Works
What the product description says
“Sérum Marin Réhydratant”
From product name

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

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).

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~3.9–5.8%
BetaineKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin and improves the product texture~3.5–5.3%
Saccharide isomerateKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin~1.3–2%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~1.1–1.7%
ErythritolKey active· HumectantEffect: HighHelps to attract water to the upper layer of the skin~0.8–1.25%
Anti-oxidation
Side benefit · Haematococcus pluvialis extract, Hibiscus sabdariffa flower extract
May help

This product contains antioxidants (haematococcus pluvialis extract) that can help neutralize free radicals in skin to lessen the damage it gets from the UV light (sun). There is some human evidence for this effect in skin, though it is smaller or less consistent than the evidence for the best antioxidants.

Haematococcus pluvialis extractKey activeEffect: MediumGreen algae extract that might contain antioxidant astaxanthin~0.1–0.3%
Hibiscus sabdariffa flower extractEffect: LowA plant extract that can be irritating. It might contain a compound anthocyanin that could be helpful in neutralizing free radicals~0.2–0.8%

Can it cause trouble?

Irritancy
2 strong irritants: Parfum, Hibiscus sabdariffa flower extract
Medium risk
We flagged 8 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.95–1.4%est.
Hibiscus sabdariffa flower extractA plant extract that can be irritating. It might contain a compound anthocyanin that could be helpful in neutralizing free radicalsHigh~0.2–0.8%est.
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymerA gelling agent that thickens the product consistency and leaves the skin with a velvety finishMedium~2–3%est.
EthylhexylglycerinA preservativeMedium~0.35–0.8%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.1–0.45%est.
Haematococcus pluvialis extractGreen algae extract that might contain antioxidant astaxanthinMedium~0.1–0.3%est.
Sodium citrateHelps to control the skin's pH level. Maintains the skin's natural film of amino-lactic acids and oils. Helps to preserve productsMedium~0.05–0.25%est.
Potassium sorbateA preservativeMedium~0.05–0.2%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~3.9–5.8%
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
Betaine~3.5–5.3%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin and improves the product texture

More about Betaine
Propanediol~2.7–4%
Formula
Irritation risk
Low

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

More about Propanediol
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer~2–3%
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
Phenoxyethanol~0.5–1%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Saccharide isomerate~1.3–2%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin

More about Saccharide isomerate
Sodium hyaluronate~1.1–1.7%
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
Parfum~0.95–1.4%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Erythritol~0.8–1.25%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps to attract water to the upper layer of the skin

More about Erythritol
Sodium gluconate~0.45–1.1%
Formula
Irritation risk
Low

Helps stabilize product formulations

More about Sodium gluconate
Caulerpa lentillifera extract~0.4–0.95%
Formula
Irritation risk
Low
More about Caulerpa lentillifera extract
Ethylhexylglycerin~0.35–0.8%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Hibiscus sabdariffa flower extract~0.2–0.8%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation

A plant extract that can be irritating. It might contain a compound anthocyanin that could be helpful in neutralizing free radicals

More about Hibiscus sabdariffa flower extract
Sodium benzoate~0.15–0.5%
Formula
Irritation risk
Low

A preservative

More about Sodium benzoate
Citric acid~0.1–0.45%
Irritant · medium
Irritation risk
Medium

Can work as an exfoliant but is typically used to adjust the product pH

More about Citric acid
Haematococcus pluvialis extract~0.1–0.3%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

Green algae extract that might contain antioxidant astaxanthin

More about Haematococcus pluvialis extract
Sodium citrate~0.05–0.25%
Irritant · medium
Irritation risk
Medium

Helps to control the skin's pH level. Maintains the skin's natural film of amino-lactic acids and oils. Helps to preserve products

More about Sodium citrate
Polyglucuronic acid~0.05–0.2%
Formula
Irritation risk
Low

Often used to support the moisturization effect of polysaccharides (contained, for example, in yeast extract)

More about Polyglucuronic acid
Potassium sorbate~0.05–0.2%
Irritant · medium
Irritation risk
Medium

A preservative

More about Potassium sorbate
Ingredient list view

Water, Glycerin, Betaine, Propanediol, Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, Phenoxyethanol, Saccharide isomerate, Sodium hyaluronate, Parfum, Erythritol, Sodium gluconate, Caulerpa lentillifera extract, Ethylhexylglycerin, Hibiscus sabdariffa flower extract, Sodium benzoate, Citric acid, Haematococcus pluvialis extract, Sodium citrate, Polyglucuronic acid, Potassium sorbate

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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
Ren SkincareSérum Marin RéhydratantYOUR PRODUCTBlissDrench & Quench 4 Hyaluronic Acids + Amino Acids All-Day Moisture SerumRoC SkincareHydration+ SerumBootsIngredients Hyaluronic Acid Serum
Match—45%43%43%
Price—$27.78$32.99—
Shared key ingredients—4 of 64 of 63 of 6
Key difference—Panthenol—Allantoin
Irritancy Medium Low Low Low
Drying alcohol————
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Product summary

"Ren Skincare - Sérum Marin Réhydratant" could be helpful for: Moisturizing, but its actives are not the most effective or are not well-studied.

Ingredient callouts

  • Humectants (erythritol 0.80% - 1.25%, sodium hyaluronate 1.10% - 1.70%, saccharide isomerate 1.30% - 2.00%, betaine 3.50% - 5.30% and glycerin 3.90% - 5.80%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

Price

The product retails for 42.00$ in the United States.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 10 studies and safety reviews.

  1. 1
    Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
  2. 2
    Hyaluronic acid: A key molecule in skin agingncbi.nlm.nih.gov
  3. 3
    Hyaluronan (Hyaluronic Acid): a natural moisturizer for skin careresearchgate.net
  4. 4
    Anthocyanin-rich extract from Hibiscus sabdariffa calyx counteracts UVC-caused impairments in ratsncbi.nlm.nih.gov
  5. 5
    Hibiscus sabdariffa L. – A phytochemical and pharmacological reviewsciencedirect.com
  6. 6
    Liposome-containing Hibiscus sabdariffa calyx extract formulations with increased antioxidant activity, improved dermal penetration and reduced dermal toxicityncbi.nlm.nih.gov
Ren Skincare Sérum Marin Réhydratant
Ren SkincareSérum Marin Réhydratant
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