July 31, 2026
How to Patch Test a New Cosmetic Product Safely
A practical guide to screening a new cosmetic on intact skin, choosing an appropriate schedule, interpreting reactions, and knowing when to seek help.
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Skin Preparation
July 31, 2026
Primer by Skin Type: A Practical Guide for Dry, Oily, and Combination Skin
Learn how to choose and apply primer based on dryness, oiliness, combination areas, finish preferences, climate, and the makeup problem you want to solve.
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