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 function based on their own particular properties (e.g., hyaluronic acid, essential fatty acids); and as exfoliating and peeling agents (e.g., alpha hydroxy acids). Only those acid ingredients with a very low pH will be irritating to the skin because the skin itself is acidic.
This store requires javascript to be enabled for some features to work correctly.
Bev Sidders Skincare Glossary
Read about what each ingrediant includes and does for your skin.