One common example of atom economy is the synthesis of aspirin (acetylsalicylic acid) from salicylic acid and acetic anhydride. The reaction is: Salicylic Acid + Acetic Anhydride → Aspirin + Acetic ...

The fix: Use salicylic in the morning and your retinoid at night. 5. Soap-Based Cleanser and Vitamin C Vitamin C, also known as ascorbic acid, requires a PH (or a measurement of acidity ...

If you suffer from chronically dry skin, odds are you’re familiar with hyaluronic acid. The popular ingredient absorbs moisture and draws it into your skin to hydrate it, dermatologists say.