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Kjaer Weis The Beautiful Hydration Serum
Kjaer Weis

Kjaer Weis The Beautiful Hydration Serum

Efficacy75/100IrritancyMedium
See all ingredients

Works for

Moisturizing
Hyaluronic acid, Sodium hyaluronate + 3 more
Works
What the product description says
“The Beautiful Hydration Serum”
Source: Bluemercury

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

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).

Hyaluronic acidKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin. Naturally present in skin. Typically has large molecule size unless advertised otherwise on the product label. Helps support skin's barrier function and may help to reduce inflammation~22–33%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~4.7–7%
TrehaloseKey active· HumectantEffect: HighA sugar that attracts water to the upper layer of the skin~3.5–5.3%
Polyglutamic acidKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin.~1.9–2.9%
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~0.9–1.35%

Can it cause trouble?

Irritancy
2 strong irritants: Lavandula angustifolia flower water, Parfum
Medium risk
We flagged 4 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Lavandula angustifolia flower water—High~8.3–12.5%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.1–0.5%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.45–1%est.
Sodium dehydroacetateA preservativeMedium~0.15–0.55%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

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Ingredients

Filter by role to see what each ingredient is doing.

Hyaluronic acid~22–33%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-inflammatoryAnti-aging

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin. Naturally present in skin. Typically has large molecule size unless advertised otherwise on the product label. Helps support skin's barrier function and may help to reduce inflammation

More about Hyaluronic acid
Lavandula angustifolia flower water~8.3–12.5%
Irritant · high
Irritation risk
High
More about Lavandula angustifolia flower water
Sodium hyaluronate~4.7–7%
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
Trehalose~3.5–5.3%
Key active
Irritation risk
Low
Works for
Moisturizing

A sugar that attracts water to the upper layer of the skin

More about Trehalose
Dioscorea batatas root extract~2.7–4.1%
Formula
Irritation risk
Low
More about Dioscorea batatas root extract
Polyglutamic acid~1.9–2.9%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin.

More about Polyglutamic acid
Silver~1.2–1.8%
Formula
Irritation risk
Low
More about Silver
Glycerin~0.9–1.35%
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
Citric acid~0.45–1%
Irritant · medium
Irritation risk
Medium

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

More about Citric acid
Sodium dehydroacetate~0.15–0.55%
Irritant · medium
Irritation risk
Medium

A preservative

More about Sodium dehydroacetate
Parfum~0.1–0.5%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Ingredient list view

Hyaluronic acid, Lavandula angustifolia flower water, Sodium hyaluronate, Trehalose, Dioscorea batatas root extract, Polyglutamic acid, Silver, Glycerin, Citric acid, Sodium dehydroacetate, 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
Kjaer WeisThe Beautiful Hydration SerumYOUR PRODUCTgrace & stellahyaluronic acid serumChick CosmeticsDewy Face Serum - Hyaluronic Acid 2% + B5BADSKINCollagen Bomb Hydrating Ampoule
Match—46%43%41%
Price—$9.95—$24.00
Shared key ingredients—4 of 54 of 54 of 5
Key difference—Acetyl Hexapeptide-8PanthenolAdenosine
Irritancy Medium Low Low Low
Drying alcohol————
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Product summary

"Kjaer Weis - The Beautiful Hydration Serum" could be helpful for: Moisturizing, but its actives are not the most effective or are not well-studied.

Ingredient callouts

  • Humectants (glycerin 0.45% - 1.00%, polyglutamic acid 1.00% - 1.50%, sodium hyaluronate 1.80% - 2.70%, glycerin 4.40% - 6.50%, polyglutamic acid 4.20% - 6.30% and hyaluronic acid 22.00% - 33.00%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

About the brand

According to Cruelty-Free Kitty "Kjaer Weis" is cruelty free and so is its parent company.

Price

The product retails for 85.00$ 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 8 studies and safety reviews.

  1. 1
    Efficacy of a New Topical Nano-hyaluronic Acid in Humansncbi.nlm.nih.gov
  2. 2
    Physiochemical properties and application of hyaluronic acid: a systematic reviewonlinelibrary.wiley.com
  3. 3
    Hyaluronic acid: A key molecule in skin agingncbi.nlm.nih.gov
  4. 4
    Hyaluronan (Hyaluronic Acid): a natural moisturizer for skin careresearchgate.net
  5. 5
    γ‐Polyglutamic Acid Produced by Bacillus Subtilis (Natto): Structural Characteristics, Chemical Properties and Biological Functionalitiesonlinelibrary.wiley.com
  6. 6
    Natural and edible biopolymer poly‐γ‐glutamic acid: synthesis, production, and applicationsonlinelibrary.wiley.com
Kjaer Weis The Beautiful Hydration Serum
Kjaer WeisThe Beautiful Hydration Serum
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