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Propylene Glycol
A clear, colorless, viscous, slightly bitter-tasting solvent, wetting agent and Humectant, it is the most common moisture-carrying vehicle used in cosmetics aside from water. It is also found in food as a confectionery, chocolate products, ice cream emulsifiers, shredded coconut, beverages, baked goods, toppings, icings, and meat products to prevent discoloring during storage.
Propylene Glycol also promotes the retention of moisture and has the same moisture drawing properties as glycerin. When a sample of pure Propylene Glycol is set out in air, it will absorb up to 60 percent of its weight in water. On a safety note: Propylene Glycol is NOT antifreeze as some of the internet literature would have you believe (many "natural product" companies hawking their wares claim this erroneously).
Ethylene Glycol, on the other hand is antifreeze. Propylene Glycol is approved by the FDA and can be found in everything from toothpaste to coating fruits and vegetables in your local grocery store. There is no evidence that this ingredient has been found to be a toxin and most often becomes confused with Ethylene Glycol which is found in Radiator Fluid and is in fact a toxin.
Because Ethylene Glycol is so dangerous to humans and the environment, an Earth friendly, nontoxic coolant has been created from Propylene Glycol in recent years. Again this is not the same as the toxic Ethylene Glycol. Propylene Glycol is a very efficient co-solvent, humectant and water-soluble skin moisturizer. It is a superior lightweight ingredient that has water-binding capacity and can help other ingredients penetrate the skin.
Protein Treatment
A treatment used on the hair. Designed to add strength and elasticity to the hair by adding protein to the cortex.
Relaxer
Also called a straightener, this is the opposite of a permanent. Hair is straightened by combing a chemical solution through it.
Revitalizer
An intensive, deep-conditioning product that restores moisture and strengthens hair. It is especially good for hair that has been damaged by chemicals.
Seasonal Coloring
A principal of coordinating certain groups of colors that are flattering to particular kinds of coloring. Broken into four categories: Spring, Summer, Autumn and Winter.
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