Let's take an indepth look at what they are and exactly why parabens should be avoided. Parabens are an inexpensive preservative that are present in the majority of our beauty products. The ingredients found in most beauty products are biodegradable - the addition of parabens adds to a product's shelf life. The most common products are shampoo, conditioner, toothpaste, creams and lotions and even scrubs. It is estimated that up to 85% of beauty products contain parabens. They prevent the formation of mold and bacteria which can obviously be damaging to you. While this bacteria and mold can be damaging to our bodies, the potential dangers of parabens are still being evaluated.