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Product summary

"Kate Somerville - Peptide K8™ Power Cream" has a good moisturizing formula. The formulation is based on a combination of good humectants and emollients. Both are needed to increase the skin hydration level. Urea, copper pca, glycerin, sodium hyaluronate and sodium pca in this product (humectants) attract water molecules to the upper layer of the skin (the water comes from the outside air or from the deeper layers of the skin if the air is dry). Emollients in this formulation (ceramide 2, cannabis sativa seed oil, cholesterol, isopropyl myristate and dimethicone) help to reduce the moisture loss from the skin. They also soften the skin surface and relieve the feeling of dryness and tightness.

Ingredient callouts

  • Another benefit is that this moisturizer contain ceramides (ceramide 2 0.35% - 0.65%). Ceramides are an important part of our natural skin barrier. The ceramides used in skincare are synthetic or come from plants. They help soften the skin and can help "fill the gaps" in the skin barrier, keeping the skin hydrated and resilient for longer.
  • This moistruizer also contains peptides (palmitoyl oligopeptide 0.40% - 0.60%). Peptides is a very big group of ingredients. They all consist of a different combination of amino-acids. Our skin produces peptides naturally. Some of them work as natural anti-biotics, promote wound-healing and production of collagen. The scientists are still studying how effective the topical application of peptides is, but it is very likely that peptides in skincare are helpful. They might be able to support skin barrier restoration and even have an anti-aging benefit. At the very least, they certainly help attract water to the skin and support the hydration in this way.

Irritation risk

This moisturizer contains a bunch of common irritants, including ingredients that do not provide any known benefit for the skin. It might not be the best choice if your skin is sensitive. We assess the overall irritancy of this moisturizer to be high. For a detailed overview of all potential irritants: click here

You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.

About the brand

According to Cruelty-Free Kitty "Kate Somerville" is cruelty free, but its parent company is not.

Price

The product retails for 205.00CA$ in Canada, from 158.00$ up to 171.50$ in the United States and from 132.00£ up to 149.00£ in the United Kingdom.

For a detailed price comparison: click here.

Can the product deliver on its promises?

See a mistake?
Promise
What does the product description say?
"Key Benefits Reduces the appearance of skin's rednessClinically proven to smooth the appearance of lines and wrinklesImproves the skin's tone and textureSee improved moisturisation levels after just four weeksCan be used alone or in conjunction with a treatment serum UK200023236"
WIMJ summary for anti-aging

This product contains palmitoyl oligopeptide. 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.

Ingredient Effectiveness Concentration Irritancy
MEDIUM
meets threshold
LOW
does not meet threshold
See a mistake?
Promise
What does the product description say?
"Combined with an advance moisture complex, skin will feel smoother and deeply hydrated."
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: copper pca, glycerin.

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.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: ceramide 2, palmitoyl oligopeptide, urea

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
HIGH
meets threshold

How honest is this product?

Promise Can it deliver?
Moisturizing
Anti-aging
Total Promises Fulfilled score: 87/100.

Potential irritants

IRRITANCY
HIGH

Ingredients by volume

Ingredient Estimated concentration
Plain old water
45% - 55%
Helps oil and water mix together and works as an emollient
7.5% - 9.2%
A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture
4.2% - 5.1%
Helps oil and water mix together. Has some emollient properties
3.2% - 3.9%
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
2.5% - 3%
An emollient that helps soften the skin. Could be comedogenic
2% - 2.5%
Helps soften the upper layer of the skin
1.7% - 2.1%
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
1.6% - 1.9%
A silicone that helps improve the product texture and spreadability. Can absord oil creating a short-term mattifying effect on the skin
1.3% - 1.6%
Enhances the product texture and makes it more spreadable. Helps reduce water loss from the outer layer of skin. Extands the shelf life by preventing bacteria growth
1.1% - 1.3%
A good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin
0.9% - 1.1%
A plant oil that can help soften the upper layer of the skin. Might be helpful in calming down inflammation in skin
0.7% - 1.05%
A plant oil that due to its high linoleic acid content can help strengthen skin's barrier function and soften its upper layer
0.6% - 0.95%
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.
0.6% - 0.9%
An emollient that is naturally found in skin
0.6% - 0.85%
Naturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations
0.5% - 0.75%
Naturally present in skin and helps to attract water to its upper layer
0.5% - 0.75%
A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture
0.5% - 0.8%
Plant oil from nuts that helps soften the upper layer of the skin. Contains a high concentration of oleic acid that can weaken skin's barrier function and increase water-loss while enhancing penetration of other ingredients
0.5% - 0.75%
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.
0.5% - 0.7%
0.4% - 0.6%
Used to create a thicker product consistency and soften the upper layer of the skin
0.4% - 0.6%
Used to adjust pH of the product and can help improve the product's smell
0.35% - 0.65%
Used to create a thicker product consistency
0.35% - 0.65%
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
0.35% - 0.6%
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.
0.35% - 0.6%
Helps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated
0.3% - 0.6%
A sugar that attracts water to the upper layer of the skin
0.3% - 0.6%
A plant oil with high content of volatile compounds that, especially when exposed to air, can cause allergic reactions and irritate the skin
0.3% - 0.55%
Being a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.
0.3% - 0.6%
A type of lipid similar to ceramides naturally present in skin. Helps to soften the upper layer of the skin and supports the skin barrier function to keep it hydrated. Can help to prevent inflammation in skin
0.35% - 0.65%
0.45% - 0.7%
Used to dissolve other ingredients
0.3% - 0.6%
Helps attract water to the upper layer of the skin
0.3% - 0.55%
An emollient that helps create a nice silky finish on the skin
0.3% - 0.6%
One of the best moisturizing ingredients. Attracts water into the upper layer of the skin
0.3% - 0.55%
A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles
0.4% - 0.6%
Stabilizes the product formulation
0.25% - 0.5%
Can work as an exfoliant but is typically used to adjust the product pH
0.25% - 0.45%
A preservative
0.2% - 0.35%
A preservative
0.15% - 0.3%
A preservative
0.1% - 0.25%
An aromatic blend of unspecified and possibly irritating ingredients
0.15% - 0.25%
A fragrance with jasmine smell. A likely irritant
0.15% - 0.25%
A fragrance. Can trigger allergic reactions and be irritating
0.1% - 0.15%
A common frangrance that can easily irritate skin, especially if exposed to air, light or heat
0.1% - 0.15%

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WIMJ similarity score
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Irritancy
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Potential Irritants
All ingredients
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Questions

Scientific Sources