The ingredients that go into your menstrual products are crucial for your health, therefor menstrual products should be regarded as medical devices not as mass-market goods.
Your vagina has the most absorbent tissue in the body and it will literally allow all chemicals in conventional intimate care to enter your body. Conventional products use synthetic materials (plastic linked to hormone disruption), perfumes (highly irritants and another cause of hormonal imbalances), dioxins (made from chemical bleaching that threaten the reproductive system) and many more health-threatening chemicals.