Kiehl's Most Loved Formulas For All

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

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. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production

Used for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)

Can be helpful in reducing inflammation in skin, including inflamed acne. It can be irritating

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

Used for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)

Helps water and oil mix together

Used to create a thicker product consistency

A type of silicone that helps soften the upper layer of the skin and create a nice product texture

Helps create a thicker or gel-like product texture. It is not a surfactant but can be used in gentle cleansing formulations

A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture

Helps water and oil in the product mix well together and improves product texture

A non-drying alcohol that works to soften the skin and stabilize product formulations helping oil and water mix together

Helps water and oil mix together. Used as a cleansing ingredient. Could be an allergen

Helps oil and water mix together. Can be irritating

An emollient that helps soften the skin

Used to adjust pH of the product and can help improve the product's smell

Helps oil and water mix together and works as a cleansing agent

An emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together

Helps create a more spreadable product texture

A plant oil that can help soften the skin. It might be helpful in calming down inflammation, but solid research is lacking. Is often used in lip products to create the needed product consistency

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

Helps oil and water mix together

Helps oil and water mix together. Could be comedogenic

An emollient that is naturally present in skin and helps soften it

Helps oil and water mix together

Helps oils and water mix together and works as a cleansing agent

Helps water and oil mix together

Works as a foaming cleansing agent

Helps water and oil mix together

Used to help oil and water mix together. Can be irritating

Helps oil and water mix together and works as an emollient

Used mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin