Catharine Malzahn
Contributing beauty writer
Catharine Malzahn is a contributing beauty writer at Cosmopolitan and was previously the beauty assistant at Good Housekeeping, Woman's Day, and Prevention.
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Latest from Catharine Malzahn
12 Best Hair Brushes of 2024, Tested and Reviewed
Find the brush that is made for your specific hair type.
8 Best Microcurrent Devices, According to Testing
Which microcurrent devices actually work? We put the most popular picks to the test to find out.
10 Best Retinol Serums for Your Skin, Approved by Experts
Turn back time with these anti-aging serums, with picks for all skin types.
9 Causes of Dull, Tired Skin and How to Fix Them
The best remedies for treating dull skin, including products and natural solutions.
14 Very Best Products for Styling Wavy Hair
Tried-and-tested recommendations for shampoos, conditioners and more.
The Best Bar Soaps
Our top-tested bar soaps can be used on sensitive skin, dry skin and more.
16 Best Zinc Oxide Sunscreens, According to Lab Testing
The best zinc oxide sunscreens for face and body that won't leave a white cast.
The Best Mineral Sunscreens, According to Testing
These top-tested mineral sunscreens for face and body won't leave a white cast behind.
15 Best Shampoos for Curly Hair, According to Experts
From drugstore picks to sulfate-free formulas, there's a curly hair shampoo for every hair concern.
10 Best Sunscreen Sticks of 2024, According to Experts
You can use these on-the-go SPFs on oily skin, acne-prone skin and even over makeup.
7 Best Hand Creams With SPF, According to Experts
Hydrate and protect delicate skin by using these top-tested hand creams with SPF.
What to Know About Mandelic Acid, According to Dermatologists
Discover everything you need to know about this gentle exfoliator, including its benefits and side effects.