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Comedogenicity-
You may have observed that when you begin using a particular skin care product, you begin getting whiteheads and blackheads. Whiteheads and blackheads are called comedones. A product that causes comedones is called comedogenic.
How Comedogenicity Is Found?
To find out if a material is comedogenic, it is tested on the insides of a rabbit’s ear. After three weeks, the area of application is observed and a small biopsy is done. The number of comedones is counted and the material tested is labeled as comedogenic on a scale of 0 to 5. The material that causes no comedones is labeled 0 and the highest comedogenic product is labeled as 5.
The test is done on individual ingredients. As most of the skin care products are made of more than one ingredient, the term comedogenic or non-comedogenic can also be used for a product with more than one ingredient.
Product Labeling-
Therefore if a product has five ingredients, out of which one is comedogenic, the product will be labeled comedogenic. To be labeled as non-comedogenic all the ingredients must be non comedogenic. Every product to be used on the body can be tested in this manner and labeled.
Use products labled non-comedogenic to prevent formation of whiteheads and blackheads.
Article created on: June 16, 2006
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Acne & Sunshine
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Despite the belief that acne gets cleared by sunshine, there is no scientific evidence to this. Excess sun can damage your skin rather than treating acne.
Click here to learn more on Sun Damage.
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