The word "Acnegenic" refers to products that produce or aggravate lesions of acne and is often used interchangeably with the word "Comedogenic" which refers more specifically to a type of a acne breakout called Comedones aka Blackheads.
Basically if your skin is prone to breakouts you will want to avoid using all products that contain acnegenic ingredients. These common ingredients can be hiding within even some of the best products on the market including acne treatment products, which result in an ineffective treatment for your breakouts. When in doubt about a product's acnegenic or comedogenic potential always consult with your Esthetician or Dermatologist!
1. Lanolin - Fatty substance derived from Sheep's Wool is a known emollient with moisturizing properties that can have skin clogging capabilities that trigger the cycle of breakouts.
2. Mineral Oil - Used in many products and has been shown to cause/aggravate acne by physically blocking water loss in the Stratum Corneum.
3. D & C Pigments - Dyes and Coal Tar derivatives have exhibited highly comedogenic and acnegenic properties.
4. Fragrance - Artificial fragrances can increase acne infections, sun sensitivity and sensitization.