When I switched from tampons to Reusable Cups I didn't know aside from reducing my monthly trash I would benefit my health. Indeed 85 % of tampons contain glyphosate , an ingredient ruled as "probably carcinogenic " by the World Health Organization.
This is due to the fact that cotton in tampons ( usually GMO ) is sprayed with this herbicide.
Plus I just noticed my lady parts feeling better and many friends told me the same.
As for my wallet, it is feeling relieved as well since I don't go the the store every other month anymore. And I actually did the maths. An average woman has her periods for around 40 years and I used to buy 6 packs a year, compared to $30 cup lasting 5 years :