Kiehl's - Retinol Skin-Renewing Daily Micro-Dose Serum

Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum

WORKS FOR
  • Anti-aging
  • Anti-oxidation
  • Exfoliation
  • Moisturizing
  • Evens skin tone
  • Anti-blemish
  • +3 more
KEY INGREDIENTS
  • niacinamide
  • acetyl dipeptide-1 cetyl ester
  • adenosine
  • hydroxypalmitoyl sphinganine
  • retinol
  • ceramide np
  • 2-oleamido-1,3-octadecanediol
  • cetearyl alcohol
  • cetyl alcohol
  • diisopropyl sebacate
  • glycerin
  • glycine soja oil
  • helianthus annuus seed oil
  • lauroyl lysine
  • sodium hyaluronate
  • tocopherol
  • +13 more
PROMISES
FULFILLED
100 /100
IRRITANCY
MEDIUM
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Where to buy?

In stock $89.90
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Price as of 10/3/2021 11:16 GMT. More info
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Formula review

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WIMJ summary

This product can help reduce breakouts and clogged pores because it contains the following ingredient: retinol. This ingredient is used for treating acne and can have a noticeable effect.

In addition, this product contains niacinamide. It can help in reducing blemishes, even though it is less effective.

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
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Promise
What does the product description say?
"Precisely formulated to deliver a daily-strength micro-dose of Pure Retinol, our formula visibly reduces the appearance of wrinkles, refines the look of skin texture and firms skin’s feel with minimal discomfort."
WIMJ summary

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

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: acetyl dipeptide-1 cetyl ester, 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.

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
MEDIUM
meets threshold
See a mistake?
WIMJ summary

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: retinol.

In addition, this product contains niacinamide. This ingredient (ingredients) might help reduce hyperpigmentation, but the effect, if any, is likely to be small.

Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
See a mistake?
WIMJ summary

This product can help exfoliate the skin. In other words, it helps break down the bonds between dead cells on the surface of the skin and speed up the skin turnover. Skin often appears softer and brighter after exfoliation, but overdoing it can result in disrupted skin barrier. The following ingredient is doing the exfoliating job in this product: retinol.

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

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, sodium hyaluronate.

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, glycine soja oil.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: acetyl dipeptide-1 cetyl ester, ceramide np, hydroxypalmitoyl sphinganine, niacinamide

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
HIGH
meets threshold
HIGH
meets threshold
See a mistake?
WIMJ summary

This product contains antioxidants (retinol) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).

Ingredient Effectiveness Concentration Irritancy
HIGH
meets threshold
LOW
meets threshold
HIGH
does not meet threshold

Potential irritants

IRRITANCY
MEDIUM

Ingredients by volume

Ingredient Estimated concentration
Plain old water
45% - 55%
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
4.4% - 5.3%
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
4% - 4.8%
Used to preserve products, dissolve other ingredients and create a nice product texture
3.1% - 3.8%
Is proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture
2.3% - 2.8%
A non-drying alcohol that works to soften the skin and stabilize product formulations helping oil and water mix together
1.9% - 2.4%
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
1.7% - 2.1%
Forms a protective film on the surface of the skin to prevent moisture loss. Gives a velvety feel to products while reducing tackiness
1.5% - 1.8%
Helps soften the upper layer of the skin without creatng a greasy finish
1.2% - 1.4%
Helps soften the upper layer of the skin and slow down the water loss over time
0.9% - 1.1%
0.65% - 0.95%
A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles
0.55% - 0.85%
Might help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to stimulate collagen production in skin
0.5% - 0.75%
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
0.5% - 0.75%
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
0.4% - 0.6%
Helps soften the upper layer of the skin and creates a nice product texture
0.4% - 0.6%
An emollient that helps to soften the skin and create a pleasant product texture and stabilize the formulation
0.4% - 0.65%
Used to increase stability of product formulations
0.35% - 0.65%
Used to thicken the product formulation and might help to add minerals to the surface of the skin. It is used in scrubs as a physical exfoliant. Can increase sensitivity to other ingredients if left on the skin or used in high concentration
0.3% - 0.55%
One of the best moisturizing ingredients. Attracts water into the upper layer of the skin
0.3% - 0.5%
Used to adjust the product's pH
0.25% - 0.5%
Used to improve stability of the formulation
0.25% - 0.45%
Two steps removed from the active form of vitamin A - retinoic acid. Once converted to the retinoic acid in the skin, retinol is proven to be effective against all signs of aging. It improves skin cell turnover, helps fight blemishes and clogged pores, can regulate excess oil production and even skin tone. It can, however, be quite irritating
0.2% - 0.4%
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% - 0.45%
Helps soften the upper layer of the skin while creating a non-greasy feel on the skin. Helps to dissolve other ingredients
0.25% - 0.5%
Used to create a thicker product consistency
0.25% - 0.45%
Non-drying alcohol that helps water and oil mix together. Also serves as an emollient
0.3% - 0.55%
Helps preserve products and creates a nice product texture
0.25% - 0.5%
Helps create a gel-like product texture. Can be used in gentle cleansing formulations
0.25% - 0.45%
A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture
0.3% - 0.5%
Helps water and oil in the product mix well together and improves product texture
0.25% - 0.5%
A good emollient that helps soften the skin and helps repair its barrier function
0.25% - 0.45%
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
0.25% - 0.5%
Used to thicken product formulations and create gel-like textures
0.25% - 0.45%
Used mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin
0.25% - 0.5%
A fragrance. Can be irritating
0.2% - 0.4%
0.25% - 0.4%
0.2% - 0.4%
Helps water and oil mix together
0.2% - 0.35%
0.15% - 0.25%
0.15% - 0.3%
A colorant adding orange or bright yellow color
0.15% - 0.25%
A preservative
0.1% - 0.2%
A preservative. It helps prevent bacterial growth in cosmetic products
0.15% - 0.25%

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