This is polyethylene:
Did you know that polyethylene is the most common plastic in the world? It is used primarily for containers and packaging, such as these bottles and plastic grocery bags, and has been a concern for the environment because polyethylene lasts practically forever and isn’t biodegradable. It only breaks down into smaller and smaller particles until you can’t see it anymore. That’s why a couple of states are trying to ban it in body scrubs and dental products.
This is also polyethylene:
Well, not all of it. Most of it is toothpaste. But do you see those blue specks? That’s plastic. This is the suggested pea-sized amount that you should use when you brush your teeth. Yes, there is plastic in this toothpaste.
Want to see how many pieces of plastic are in this exact sample?
Not that I’m counting the bits but that seriously looks like A LOT of plastic… err…high density polyethylene. That’s what plastic trash cans are made from! If you throw away the box like most people do, the ingredients aren’t actually listed on the tube (sneaky, sneaky, Procter & Gamble!) However, I was able to track down the box here at this link. We’re not talking about polyethylene glycol, which is soluble in water. This stuff won’t dissolve in water, or even acetone or alcohol for that matter. How do I know it won’t dissolve? Because I put on my little scientist hat and tested it.
Like many of you, we often let our daughter pick out her own toothpaste at the store. She liked the tween vibe of this particular product so much that she chose it twice, but eventually the squeezed-out tubes ended up in the back of her toothpaste drawer.
Read rest of article here: http://www.dentalbuzz.com/2014/03/04/crest-imbeds-plastic-in-our-gums