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Rating Ingredient
Poor

oak root extract

Extract that can be a skin sensitizer.

Best

oat beta-glucan

Best

oat bran extract

Oat bran extract is a portion of the oat plant that contains antioxidant and soothing properties...

Best

oat kernel extract

Best

oatmeal

Can have skin-soothing properties…

Best

octinoxate

Also known as octyl methoxycinnamate and ethylhexyl methoxycinnamate…

Categories: Sunscreen Actives
Best

octisalate

Technical name for the active sunscreen ingredient octyl salicylate (also known as ethylhexyl...

Categories: Sunscreen Actives
Best

octocrylene

Globally-approved sunscreen agent that protects skin from the UVB range of sunlight.

Categories: Sunscreen Actives
Good

octyldodecanol

Opacifying agent, used primarily as a texture enhancer in moisturizers because of its lubricating and emollient properties.

Good

octyldodecyl myristate

Mixture of octyldodecanol (thickener) and myristic acid that forms a new compound used as a...

Good

octyldodecyl neopentanoate

Skin-softening agent and emollient.

Categories: Emollients, Skin-Softening
Best

octyl methoxycinnamate

Sunscreen agent used to protect skin primarily from the sun’s UVB rays…

Categories: Sunscreen Actives
Good

octyl palmitate

Used in cosmetics as a texture enhancer and emollient.

Best

octyl salicylate

Sunscreen agent used to protect skin primarily from the sun’s UVB rays...

Categories: Sunscreen Actives
Good

octyl stearate

Used in cosmetics as a texture enhancer and emollient.

Good

o-cymen-5-ol

Preservative used in cosmetics.

Categories: Preservatives
Best

Oenothera biennis oil

Good

Olea europaea fruit oil

Best

Olea europaea oil unsaponifiables

An unsaponifiable oil is the portion of a plant oil that is not broken down when the oil's fatty...

Best

oleanolic acid

A skin-soothing ingredient, especially when used in synthetic rather than natural form...

Good

oleic acid

Fatty acid used as a cleansing agent and texture enhancer.

Good

oleth-10

A form of fatty alcohol that functions as a texture enhancer and cleansing agent.

Good

oleths

Mild cleansing agents.

Categories: Cleansing Agents
Good

oleyl erucate

Skin-softening agent derived from oleyl alcohol, which is obtained chiefly from fish oil.

Categories: Skin-Softening
Poor

olibanum extract

Good

olive oil/olive fruit oil

Emollient plant oil similar to many other non-fragrant plant oils. The concept of olive oil having...

Poor

orange blossom

Fragrant extract that can also be a skin sensitizer.

Good

Orbignya martiana

Categories: Plant Extracts, Emollients
Good

Orbignya oleifera

Categories: Plant Extracts, Emollients
Poor

orchid

Fragrant flower that can be a skin sensitizer.

Poor

oregano

Has beneficial properties, but can also be a skin sensitizer.

Poor

Origanum majorana

Poor

Origanum vulgare flower extract

Poor

orris root

Used primarily as a fragrant component due to its violet-like scent (Source:...

Good

oryzanol

Component of plants and their products, such as rice bran, that has potent antioxidant properties.

Best

Oryza sativa cera

A natural, non-fragrant wax obtained from rice bran. It functions as a skin-softening agent...

Categories: Skin-Softening
Good

Oryza sativa oil

Categories: Plant Extracts, Emollients
Best

oxidoreductase

Large group of enzymes that block oxygen in different forms from generating environmental damage.

Categories: Antioxidants
Best

oxybenzone

Oxybenzone (also known as benzophenone-3) is a sunscreen agent that protects primarily from the...

Categories: Sunscreen Actives
Good

ozokerite

Mineral that is used as a texture enhancer in cosmetics, especially in lipsticks and stick...

Categories: Texture Enhancer

About the Experts

Paula Begoun is the best-selling author of 20 books about skincare and makeup. She is known worldwide as The Cosmetics Cop and creator of Paula’s Choice Skincare. Paula’s expertise has led to hundreds of appearances on national and international radio, print, and television including:

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The Paula's Choice Research Team is dedicated to busting beauty myths and providing expert advice that solves your skincare frustrations so you can have the best skin of your life!