Do you know what your tampon is made of? Probably not. That's because tampon manufacturers aren't required to disclose the exact blend of cotton, rayon, or other materials they use. While more research still needs to be done on the topic, conventional tampons may expose you to toxins.
One concern is the potential for trace amount of dioxins resulting from the process of creating rayon — a synthetic fiber. The World Health Organization has stated that dioxins are highly toxic and can lead to reproductive and development problems, disrupt hormones, and potentially cause cancer. While researchers have found there to be minimal amounts of dioxins in tampons, when you think about the fact that the average woman will use roughly 12,000 tampons in her lifetime, there is reason to pause. That cumulative effect could have major health consequences, especially considering that tampons come in contact with permeable tissues connected to the reproductive system.
Your best bet? Be aware of the chemicals found in many feminine care products, and check out the new healthy tampons coming to the marketplace and alternatives like menstrual cups.