Tampons are feminine hygiene products that are inserted into the vagina to absorb menstrual blood. The materials used in tampons can vary depending on the brand and type of tampon. However, there are concerns about the safety of some of the ingredients used in tampons.

According to an article on Popular Science, there is not a lot of conclusive research to help consumers understand what the presence of substances such as microplastics or phthalates actually means for the user’s health. The article also mentions that companies are not legally required to divulge their ingredients to US customers.

While there is no definitive answer to the question of how long a tampon can be safely worn, it is generally recommended that tampons be changed every 4-8 hours to reduce the risk of toxic shock syndrome (TSS), a rare but potentially life-threatening condition that can occur when certain types of bacteria produce toxins in the body.

In summary, while tampons are generally considered safe to use, there are concerns about the safety of some of the ingredients used in tampons. It is recommended that tampons be changed every 4-8 hours to reduce the risk of TSS.