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$79.00
In stock
Tatcha The Dewy Serum: Locks in Moisture for Smoother, Plumper & Dewier Skin, 1 oz
Price as of 7/2/2022 2:23 GMT. More info
£80.00
In stock
The Dewy Serum
£80.00
In stock
The Dewy Serum
£92.00
In stock
The Dewy Serum
Show more

Can the product deliver on its promises?

See a mistake?
Promise
What does the product description say?
"The serum also includes hyaluronic acid to help plump the skin, working to reduce the appearance of fine lines and wrinkles, while squalane locks in moisture."
SpaceNK
WIMJ summary for anti-aging

Effective ingredients missing or their concentration is too low.

Ingredient Effectiveness Concentration Irritancy
MEDIUM
does not meet threshold
LOW
does not meet threshold
See a mistake?
Promise
What does the product description say?
"Comprising 73% of the serum, this blend of twice-fermented Akita rice, Okinawa algae and Uji green tea delivers high levels of gentle AHAs and lactic acid to help remove the dead skin cells that can dull a complexion."
SpaceNK
WIMJ summary for exfoliation

This product does not contain effective exfoliating ingredients. It might be able to deliver physical exfoliation, that is scrub off some of the dead cells on the surface of the skin. We do not recommend physical exfoliation, because it is not uniform (some bits of skin can get exfoliated too much while others not at all). It can also traumatize the skin and aggrevate acne and other skin conditions.

See a mistake?
Promise
What does the product description say?
"The serum also includes hyaluronic acid to help plump the skin, working to reduce the appearance of fine lines and wrinkles, while squalane locks in moisture."
SpaceNK
WIMJ summary for moisturizing

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, hydrolyzed collagen.

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: dimethicone, squalane.

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
HIGH
meets threshold
See a mistake?
WIMJ summary for evens skin tone

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

Ingredient Effectiveness Concentration Irritancy
MEDIUM
meets threshold
MEDIUM
does not meet threshold

How honest is this product?

Promise Can it deliver?
Moisturizing
Anti-aging
Exfoliation
Total Promises Fulfilled score: 25/100.

Potential irritants

IRRITANCY
MEDIUM
Ingredient Irritancy Skin Benefit
crambe abyssinica seed oil
Has skin benefit
stearyl glycyrrhetinate
Has skin benefit
ascorbyl tetraisopalmitate
Has skin benefit

Ingredients by volume

Ingredient Estimated concentration
 39% - 59%
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
4.3% - 6.5%
Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin
3.3% - 5%
Plain old water
2.4% - 3.7%
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.
1.9% - 2.8%
An emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together
1.5% - 2.2%
Forms a protective film on the surface of the skin to prevent moisture loss. Gives a velvety feel to products while reducing tackiness
1.2% - 1.8%
Non-drying alcohol that helps water and oil mix together. Also serves as an emollient
1.1% - 1.6%
A silicone that helps to reduce water loss from the surface of the skin. Can temporarily "fill in" lines and wrinkles, absorb oil, and create a nice product finish
0.9% - 1.35%
An emollient that helps soften the skin
0.55% - 1.25%
One of the best moisturizing ingredients. Attracts water into the upper layer of the skin
0.4% - 1%
A typically plant-derived compound that is supposed mimic human collagen. Cannot penetrate the skin barrier so is not particularly useful in skincare products beyond attracting water to the upper layer of the skin
0.4% - 0.95%
0.3% - 0.75%
0.2% - 0.75%
Helps soften the upper layer of the skin
0.15% - 0.65%
A fatty acid derived from licorice. Works as an emollient and can help calm down inflammation
0.15% - 0.65%
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)
0.2% - 0.7%
Helps soften the upper layer of the skin
0.15% - 0.7%
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.
0.15% - 0.55%
0.15% - 0.5%
Is naturally present in skin. Helps to attract water to its upper layer
0.1% - 0.45%
0.1% - 0.5%
Used to create thicker product consistency and stabilize emulsions
0.1% - 0.45%
A gelling agent that thickens the product consistency and leaves the skin with a velvety finish
0.1% - 0.45%
Helps adjust the product pH and stabilize the formulation
0.1% - 0.4%
Helps regulate the pH of the formulation
0.1% - 0.45%
Stabilizes the product formulation
0.1% - 0.45%
A preservative
0.1% - 0.4%
Helps oil and water mix together
0.1% - 0.45%
Helps oil and water mix together
0.1% - 0.45%
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
0.1% - 0.3%
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
0.05% - 0.25%
Can be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial properties
0.05% - 0.2%
An aromatic blend of unspecified and possibly irritating ingredients
0.01% - 0.1%
A preservative. It helps prevent bacterial growth in cosmetic products
0.05% - 0.15%
0.01% - 0.05%
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Price
WIMJ similarity score
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Irritancy
IRRITANCY
MEDIUM
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
LOW
Potential Irritants
All ingredients
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