Acid —refers to the pH level of a substance, ranging from 0 for the most acidic to 6.9 for the least acidic. Acids are used in cosmetic formulations for a variety of reasons: to neutralize substances that otherwise would be too alkaline for the skin; as active principles that perform a specific f...
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Bev's Skincare Glossary
Want to know more about the details in the chemistry of skin care?
Here you can look up any topic - sorted alphabetically - and read more about what each ingredient includes and does for your skin.