That's a lot of clout. Write letters to your government or MP asking for stricter control over menstrual products. Currently, they fall into a loophole where there is little regulation. Any company can put out their product without proper testing. Tell your friends what you know and how you feel.
Menstruation is a cool part of some woman's life.
Don't hide it. Talk about it. Switch to better, more ecological products. Chlorine-free disposables without applicators are available at most health food stores. These products shouldn't contain deodorants, perfumes and known irritants which interfere with the natural chemistry of a woman's body and which we do not need.