A valuable ingredient in moisturizers because it is a humectant, meaning it attracts moisture from the air and softens the skin. The most commonly used of the alpha hydroxyacids. High in linoleic acid, this oil has great moisturizing and nourishing properties. Examples include glycerin, glycolic acid and hyaluronic acid. A built in protection mechanism to protect against sun damage.
Problem is sometimes the cells clump together and cause brown spots.
The standard measure of acidity, pH 7 is neutral, above 7 is alkaline, below 7 is acidic. The skin's normal pH is 5.5. Para-Aminobenzoic Acid, one of the B vitamins. Absorbs UVB sun rays and is used in many sunscreens. Some people are allergic to PABA, and it should be avoided if you have eczema.