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Ren Skincare REN Atlantic Kelp Magnesium Body Cream
Ren Skincare

Ren Skincare REN Atlantic Kelp Magnesium Body Cream

Efficacy75/100IrritancyHigh
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Works for

1 of 1 advertised claim delivered

Moisturizing
18 ingredients credited for this claim
Good support
What the product description says
“Helps to restore the skin's moisture balance and enhance its natural cell renewal cycle whilst it relaxes and relieves muscle fatigue.”
Source: Naturisimo

This product can help improve hydration of the skin with the two types of ingredients.

The first type is called “humectants”:
these ingredients help attract water. 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. The following ingredients in this product do the job: glycerin, magnesium pca.

This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: helianthus annuus seed oil, cetearyl alcohol.

Chondrus crispusKey activeEffect: HighRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency~0.25–0.45%
Magnesium pcaKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin~0.3–0.6%
TriheptanoinKey activeEffect: HighA synthetic triglyceride. Helps soften the upper layer of the skin~1.9–2.3%
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~4.6–5.7%
Helianthus annuus seed oilKey active· Emollient, OcclusiveEffect: HighA 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~0.6–0.9%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.2–0.4%
Cetearyl alcoholKey active· EmollientEffect: MediumA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture~1.6–2%
Plankton extractKey activeEffect: MediumCan help attract water to the upper layer of the skin~0.25–0.45%
Shea butter ethyl estersKey active· EmollientEffect: MediumHelps soften the upper layer of the skin~0.7–1.05%
GlucoseKey active· HumectantEffect: MediumHelps attract water to the upper layer of the skin. Could be helpful in restoring the skin barrier function~0.25–0.45%
Arachidyl alcohol· EmollientEffect: LowUsed to soften the upper layer of the skin and create a thicker product consistency~1.2–1.5%
Behenyl alcohol· Emollient, OcclusiveEffect: LowNon-drying alcohol that helps water and oil mix together. Also serves as an emollient~0.55–0.85%
Isononyl isononanoate· Emollient, OcclusiveEffect: LowForms a protective film on the surface of the skin to prevent moisture loss. Gives a velvety feel to products while reducing tackiness~4.2–5.1%
Lauryl laurateEffect: LowHelps soften the upper layer of the skin~3.1–3.7%
Olus oil· EmollientEffect: LowAn oil from a mixture of different vegetables. Helps soften the upper layer of the skin~1–1.2%
GluconolactoneUnder-dosedEffect: HighA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.2–0.4%
Laminaria digitata extractUnder-dosedEffect: MediumSeaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment~0.25–0.45%
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~0.25–0.45%

Can it cause trouble?

Irritancy
8 strong irritants: Rosmarinus officinalis leaf oil, Salvia sclarea extract + 6 more — patch-test recommended
High risk
We flagged 16 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Oleyl alcoholUsed as a fragranceHigh~2.3–2.8%est.
Rosmarinus officinalis leaf oilA 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 skinHigh~0.3–0.5%est.
Salvia sclarea extractUsed as a fragrance. Can be irritatingHigh~0.25–0.4%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.2–0.4%est.
CitralA fragrance with a lemon scent. A likely irritantHigh~0.15–0.25%est.
CitronellolA fragrance. Can be irritatingHigh~0.15–0.25%est.
GeraniolA fragrance. Can be irritatingHigh~0.1–0.2%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.1–0.2%est.
LinaloolA fragrance. Can be irritatingHigh~0.1–0.15%est.
Lauryl laurateHelps soften the upper layer of the skinMedium~3.1–3.7%est.
HydroxyacetophenoneUsed to increase effectiveness of preservativesMedium~0.45–0.7%est.
Plankton extractCan help attract water to the upper layer of the skinMedium~0.25–0.45%est.
GluconolactoneA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicalsMedium~0.2–0.4%est.
Sodium levulinateA preservativeMedium~0.2–0.4%est.
Potassium sorbateA preservativeMedium~0.2–0.35%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.2–0.35%est.
Comedogenic
5 ingredients rated 2 or more on the 0–5 pore-clogging scale
5 flagged
These ingredients have a comedogenic rating of 2 or more on a 0–5 scale; the table shows each one's rating. In leave-on products they can clog pores in acne-prone skin.
IngredientFunctionRatingEst. amount
Oleyl alcoholUsed as a fragrance3/5~2.3–2.8%est.
Chondrus crispusRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency3/5~0.25–0.45%est.
Plankton extractCan help attract water to the upper layer of the skin3/5~0.25–0.45%est.
Laminaria digitata extractSeaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment3/5~0.25–0.45%est.
Cetearyl alcoholA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture2/5~1.6–2%est.
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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
Glycerin~4.6–5.7%
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
Isononyl isononanoate~4.2–5.1%
Formula
Irritation risk
Low
Works for
Moisturizing

Forms a protective film on the surface of the skin to prevent moisture loss. Gives a velvety feel to products while reducing tackiness

More about Isononyl isononanoate
Lauryl laurate~3.1–3.7%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps soften the upper layer of the skin

More about Lauryl laurate
Oleyl alcohol~2.3–2.8%
Comedogenic 3/5Irritant · high
Irritation risk
High
Comedogenicity
3/5

Used as a fragrance

More about Oleyl alcohol
Triheptanoin~1.9–2.3%
Key active
Irritation risk
Low
Works for
MoisturizingCleansing

A synthetic triglyceride. Helps soften the upper layer of the skin

More about Triheptanoin
Cetearyl alcohol~1.6–2%
Key activeComedogenic 2/5
Irritation risk
Low
Comedogenicity
2/5
Works for
CleansingMoisturizing

A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture

More about Cetearyl alcohol
Hydroxystearyl alcohol~1.4–1.7%
Formula
Irritation risk
Low
More about Hydroxystearyl alcohol
Arachidyl alcohol~1.2–1.5%
Formula
Irritation risk
Low
Works for
Moisturizing

Used to soften the upper layer of the skin and create a thicker product consistency

More about Arachidyl alcohol
Olus oil~1–1.2%
Formula
Irritation risk
Low
Works for
Moisturizing

An oil from a mixture of different vegetables. Helps soften the upper layer of the skin

More about Olus oil
Shea butter ethyl esters~0.7–1.05%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps soften the upper layer of the skin

More about Shea butter ethyl esters
Helianthus annuus seed oil~0.6–0.9%
Key active
Irritation risk
Low
Works for
Moisturizing

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

More about Helianthus annuus seed oil
Behenyl alcohol~0.55–0.85%
Formula
Irritation risk
Low
Works for
Moisturizing

Non-drying alcohol that helps water and oil mix together. Also serves as an emollient

More about Behenyl alcohol
Hydroxyacetophenone~0.45–0.7%
Irritant · medium
Irritation risk
Medium

Used to increase effectiveness of preservatives

More about Hydroxyacetophenone
Carbomer~0.45–0.65%
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
Arachidyl glucoside~0.45–0.65%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Arachidyl glucoside
Hydroxystearyl glucoside~0.4–0.6%
Formula
Irritation risk
Low
More about Hydroxystearyl glucoside
Magnesium pca~0.3–0.6%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin

More about Magnesium pca
Xanthan gum~0.3–0.6%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Rosmarinus officinalis leaf oil~0.3–0.5%
Irritant · high
Irritation risk
High
Works for
Anti-oxidationAntibacterial

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

More about Rosmarinus officinalis leaf oil
Inulin lauryl carbamate~0.3–0.5%
Formula
Irritation risk
Low
Works for
Cleansing
More about Inulin lauryl carbamate
Pelargonium graveolens _x001f_geranium_x001e_ oil
Not recognized
Salvia sclarea extract~0.25–0.4%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation

Used as a fragrance. Can be irritating

More about Salvia sclarea extract
Tocopherol~0.25–0.45%
Formula
Irritation risk
Low
Works for
Anti-oxidationAnti-inflammatoryMoisturizingAnti-aging

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
Cupressus sempervirens leaf/stem extract~0.25–0.45%
Formula
Irritation risk
Low
More about Cupressus sempervirens leaf/stem extract
Chondrus crispus~0.25–0.45%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

Red algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency

More about Chondrus crispus
Plankton extract~0.25–0.45%
Key activeComedogenic 3/5Irritant · medium
Irritation risk
Medium
Comedogenicity
3/5
Works for
Moisturizing

Can help attract water to the upper layer of the skin

More about Plankton extract
Parfum~0.2–0.4%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Laminaria digitata extract~0.25–0.45%
Under-dosedComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
MoisturizingAnti-oxidationAnti-aging

Seaweed extract that helps the skin to attract water and make it more smooth for touch. Also shows promise of anti-aging properties, but good research is lacking at the moment

More about Laminaria digitata extract
Glucose~0.25–0.45%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin. Could be helpful in restoring the skin barrier function

More about Glucose
Gluconolactone~0.2–0.4%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-agingEvens skin toneExfoliationAnti-blemishAnti-oxidation

A polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals

More about Gluconolactone
Phenoxyethanol~0.25–0.45%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Sodium benzoate~0.25–0.4%
Formula
Irritation risk
Low

A preservative

More about Sodium benzoate
Sodium levulinate~0.2–0.4%
Irritant · medium
Irritation risk
Medium

A preservative

More about Sodium levulinate
Sodium hyaluronate~0.2–0.4%
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
Potassium sorbate~0.2–0.35%
Irritant · medium
Irritation risk
Medium

A preservative

More about Potassium sorbate
Citric acid~0.2–0.35%
Irritant · medium
Irritation risk
Medium

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

More about Citric acid
Citral~0.15–0.25%
Irritant · high
Irritation risk
High

A fragrance with a lemon scent. A likely irritant

More about Citral
Citronellol~0.15–0.25%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Citronellol
Geraniol~0.1–0.2%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Geraniol
Limonene~0.1–0.2%
Irritant · high
Irritation risk
High

A common frangrance that can easily irritate skin, especially if exposed to air, light or heat

More about Limonene
Linalool~0.1–0.15%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Parfum~0.05–0.15%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Ingredient list view

Water, Glycerin, Isononyl isononanoate, Lauryl laurate, Oleyl alcohol, Triheptanoin, Cetearyl alcohol, Hydroxystearyl alcohol, Arachidyl alcohol, Olus oil, Shea butter ethyl esters, Helianthus annuus seed oil, Behenyl alcohol, Hydroxyacetophenone, Carbomer, Arachidyl glucoside, Hydroxystearyl glucoside, Magnesium pca, Xanthan gum, Rosmarinus officinalis leaf oil, Inulin lauryl carbamate, Unknown, Salvia sclarea extract, Tocopherol, Cupressus sempervirens leaf/stem extract, Chondrus crispus, Plankton extract, Parfum, Laminaria digitata extract, Glucose, Gluconolactone, Phenoxyethanol, Sodium benzoate, Sodium levulinate, Sodium hyaluronate, Potassium sorbate, Citric acid, Citral, Citronellol, Geraniol, Limonene, Linalool, Parfum

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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 SkincareREN Atlantic Kelp Magnesium Body CreamYOUR PRODUCTRéViveSupérieur Body Renewal Firming CreamThalgoDeeply Nourishing Body CreamFitglow BeautyBakuchiol Body Cream
Match—58%57%56%
Price$33.05$195.00+$161.95$73.37+$40.32$39.00+$5.95
Shared key ingredients—3 of 83 of 83 of 8
Key difference—Oligopeptide-24UreaGlycolic Acid
Irritancy High High Medium High
Drying alcohol————
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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 29 studies and safety reviews.

  1. 1
    Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
  2. 2
    Effect of Olive and Sunflower Seed Oil on the Adult Skin Barrier: Implications for Neonatal Skin Careonlinelibrary.wiley.com
  3. 3
    Topically Applied Sunflower Seed Oil Prevents Invasive Bacterial Infections in Preterm Infants in Egyptjournals.lww.com
  4. 4
    Effect of topically applied lipids on surfactant-irritated skinonlinelibrary.wiley.com
  5. 5
    Impact of topical oils on the skin barrier: possible implications for neonatal health in developing countriesonlinelibrary.wiley.com
  6. 6
    Assessment report on Rosmarinus officinalis L., aetheroleum and Rosmarinus officinalis L., folium ema.europa.eu
Ren Skincare REN Atlantic Kelp Magnesium Body Cream
Ren SkincareREN Atlantic Kelp Magnesium Body Cream
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Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

Find on Amazon

As an Amazon Associate, WIMJ earns from qualifying purchases.