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Product summary

We believe that "Kiehl's - Ultra Light Daily UV Defense SPF50" can provide reliable sun protection based on the ingredients listed. It can protect from both UVA and UVB rays. This is great news because not all sunscreens with SPF ratings give UVA protection. (UVA rays do not cause sunburn, but still damage our skin and lead to early aging).

It also works as a moisturizer, so you do not have to use an additional hydrating product. This product prevents early signs of aging by protecting against sun damage (all broad spectrum sunscreens do that).

Sunscreen filters

This is a "mixed" sunscreen in the sense that it uses both mineral and organic (so-called "chemical") sun filters. Here are the organic filters this product uses: tinosorb s, uvinul a plus, mexoryl xl, octinoxate and terephthalylidene dicamphor sulfonic acid. As for the mineral filters, this sunscreen uses titanium dioxide.

Irritation risk

We assess the overall irritancy of it to be medium. 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.

Price

The product retails from 24.00£ up to 79.99£ in the United Kingdom.

For a detailed price comparison: click here.

Can the product deliver on its promises?

WIMJ summary for sun protection

This product offers a good level of protection against both UVB and UVA rays.

This sunscreen uses organic (so-called "chemical") sunscreen filters. Organic, or "chemical" filters usually provide reliable sun protection and rarely leave a white cast. Sunscreens with organic filters can sting eyes.

Non-organic (mineral) filters
Ingredient UVB UVA I UVA II Stability
titanium dioxide
Offers UVB protection
Does not offer UVA I protection
Offers UVA II protection
Is photo stable
See a mistake?
Promise
What does the product description say?
"Helps protect skin from environmental aggressors including UVA/UVB rays and pollution, which can cause the first signs of ageing ."
WIMJ summary for anti-aging

This product can help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness because it contains adenosine.

Keep in mind that it typically takes at least 6 weeks to notice any results because the changes that are needed to improve fine lines and elasticity happen in the deeper layers of the skin. No topical anti-aging product can “erase” wrinkles or fully reverse signs of aging.

This product can also help prevent early signs of skin aging because it offers a good level of broad spectrum sun protection. Sun damage is the main cause of premature skin aging, and protecting your skin from the sun is the best anti-aging strategy.

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
LOW
does not meet threshold
See a mistake?
WIMJ summary for evens skin tone

This product offers broad spectrum sun protection. It means that it can prevent hyperpigmentation and help keep the skin tone even (sun damage is the main factor causing age spots, darkening of post-acne marks and other discolorations).

Ingredient Effectiveness Concentration Irritancy
LOW
does not meet threshold
See a mistake?
Promise
What does the product description say?
"Formulated with advanced UVA/UVB technology and pollution protection ."
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: arginine, 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: arginine, dimethicone.

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
HIGH
meets threshold
See a mistake?
WIMJ summary for anti-oxidation

This product contains antioxidants (scutellaria baicalensis extract) that might be able to help neutralize free radicals in skin to lessen the damage it gets from the UV light (sun). There is not enough evidence to confirm their effectiveness in skin though.

Ingredient Effectiveness Concentration Irritancy
MEDIUM
meets threshold
LOW
meets threshold
LOW
meets threshold

How honest is this product?

Promise Can it deliver?
Sun protection
Anti-aging
Total Promises Fulfilled score: 90/100.

Potential irritants

Ingredients by volume

Ingredient Estimated concentration
Plain old water
45% - 55%
Octinoxate. When used in higher concentrations, works as a sunscreen protecting the skin from UVB rays. When used in lower concentration, helps to preserve the product formulation. Is shown to be harmful to coral reefs - consider avoiding bathing in coral reef areas when wearing a product with this ingredient. It can be irritating
5.4% - 6.6%
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
4.5% - 5.5%
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
3.1% - 3.8%
Mexoryl XL. A UV filter. Effective in the UVB and UVA range. It is stable. Unfortunately, not approved in the US yet
3.2% - 3.9%
Ecamsule, Mexoryl SX. A UV filter. Is effective mostly against the UVA rays. It is legally marketed in the US with the FDA approval since 2006, even though the ingredient is not on the official FDA list of the approved sunscreen active ingredients. It is photostable
2.6% - 3.1%
Helps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating
1.7% - 2.1%
Works as a UV filter when used in high concentrations. It is photostable and is effective mostly against the UVB light, with some protection in the UVA range. In small concentrations, used for its ability to improve the color of cosmetic products. Is usually well tolerated by the skin
1.9% - 2.4%
Produces temporary toning effect. Can help dissolve other ingredients or preserve products
1.2% - 1.4%
Used to adjust pH of the product and can help improve the product's smell
0.95% - 1.15%
Helps oil and water mix together and works as an emollient
0.8% - 1.2%
Helps oil and water mix together
0.6% - 0.9%
Used to create a nice product consistency
0.65% - 1%
An emollient that is naturally present in skin and helps soften it
0.55% - 0.8%
Helps oil and water mix togehter and creates a nice product texture
0.55% - 0.8%
An emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together
0.5% - 0.75%
A preservative. It helps prevent bacterial growth in cosmetic products
0.45% - 0.65%
A non-drying alcohol that works to soften the skin and stabilize product formulations helping oil and water mix together
0.45% - 0.7%
Can be used to help absorb oil as well as add volume and imporve texture of products.
0.4% - 0.6%
Tinosorb S. One of the most effective broad spectrum sunscreen ingredients. Protects from both UVA and UVB rays. It is photostable. Unfortunately, not approved by FDA (US) yet.
0.5% - 0.75%
Uvinul A Plus. A new generation broad spectrum sunscreen that offers an effective protection especially in the UVA range. It is stable in formulations. Unfortunately, is not approved by the FDA (US) yet
0.5% - 0.75%
Can work as an exfoliant but is typically used to adjust the product pH
0.3% - 0.5%
Is used to add opaque (non-transparent) appearance to formulations. Can be used to coat other ingredients for even dispersion. This is a different ingredient compared to the ones used in antipersperants (aluminium chloride and aluminium chlorohydrate)
0.3% - 0.55%
Helps preserve products and creates a nice product texture
0.3% - 0.55%
0.35% - 0.6%
Helps create a thicker or gel-like product texture. It is not a surfactant but can be used in gentle cleansing formulations
0.25% - 0.5%
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
0.25% - 0.5%
Helps adjust pH in products
0.25% - 0.5%
A plant extract that might contain a compound baicalin that could be helpful in neutralizing free radicals and reducing inflammation in skin. The baicalin concentration in skincare typically too low. Can be used for its fragrant properties
0.25% - 0.5%
A plant extract that might contain a compound baicalin that could be helpful in neutralizing free radicals and reducing inflammation in skin. The baicalin concentration in skincare products is often too low for an effective action. Can be used for its fragrant properties
0.25% - 0.45%
Helps water and oil mix together and create gel-like textures
0.25% - 0.5%
Improves the texture of the product and helps soften the skin. Helps oil and water mix together and can be used as a cleansing agent
0.4% - 0.6%
Used to create a thicker product consistency
0.25% - 0.5%
Helps oil and water mix together. Could be comedogenic
0.3% - 0.55%
Stabilizes the product formulation
0.25% - 0.5%
Might help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)
0.25% - 0.45%
Helps water and oil mix together
0.3% - 0.55%
An amino acid that is naturally present in skin and helps keep it hydrated. When used together with AHAs, it can reduce their irritating effect on the skin
0.25% - 0.45%
Helps to attract water to the upper layer of the skin
0.25% - 0.45%
0.25% - 0.45%
0.25% - 0.45%
Might help neutralize free radicals in skin
0.25% - 0.45%
Helps oil and water mix together
0.3% - 0.5%
Helps attract water to the upper layer of the skin and improves the product texture
0.25% - 0.45%
Used to preserve products, dissolve other ingredients and create a nice product texture
0.3% - 0.55%
A preservative
0.25% - 0.45%
A salt of an amino-acid that helps attract water to the upper layer of the skin. Might be helpful in restoring the skin barrier function
0.25% - 0.45%
0.25% - 0.5%
Used to stabilize mixtures of oil and water, and create thicker, gel-like product textures
0.25% - 0.45%
Yeast extract. Helps attract water to the upper layer of the skin
0.2% - 0.4%
Helps attract water to the upper layer of the skin and might have some anti-oxidant and skin lightening properties. It can help calm down inflammation in skin
0.2% - 0.35%
0.2% - 0.35%
Used as a fragrance and can be irritating
0.25% - 0.45%
0.15% - 0.3%
0.1% - 0.2%
A preservative
0.15% - 0.25%

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Price
WIMJ similarity score
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SPF
SPF 50
SPF 50
SPF 50
SPF 50
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SPF 50
SPF 30
SPF 50
SPF 50
SPF 50
Key ingredients
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Irritancy
IRRITANCY
MEDIUM
IRRITANCY
LOW
IRRITANCY
LOW
IRRITANCY
MEDIUM
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MEDIUM
IRRITANCY
LOW
IRRITANCY
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IRRITANCY
MEDIUM
IRRITANCY
MEDIUM
IRRITANCY
LOW
Potential Irritants
All ingredients
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Questions

Scientific Sources