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Cheaper alternatives

La Roche-Posay - Anthelios 100% Mineral Sunscreen Moisturizer with Hyaluronic Acid
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SkinMedica - Total Defense and Repair SPF 50
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Product summary

"Biossance - 4-Step Age Defense" uses a single UV filter (zinc oxide) in a relatively low concentration and might not be able to provide reliable sun protection.

It also works as a moisturizer, so you do not have to use an additional hydrating product.

Sunscreen filters

This product is a mineral sunscreen. It uses zinc oxide for sun protection. Zinc oxide almost never irritates the skin or stings eyes, but it can leave a white cast.

Irritation risk

There are actives in this product that can be irritating. We assess the overall irritancy of this sunscreen 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.