Tampons are typically made of cotton, rayon, or a blend of both, and must be cleared by the FDA. The FDA reviews data submitted by the manufacturer to ensure that both the tampon and the applicator are made with safe materials. Here are some criteria they look for:

• Tampon absorbency, strength, and integrity
• Whether they contribute to the growth of certain harmful bacteria
• Whether they change normal bacteria levels in the vagina

However, cotton and rayon are not the only ingredients that can be found in tampons. Some tampons may contain potentially toxic substances, such as phthalates, which are thought to disrupt hormones. A 2020 study found phthalates in all 12 tampons sampled, although the levels were below the threshold for toxic effects from exposure through the skin. Researchers have also attempted to take tampons apart to understand whats in the cotton stuffing, and their results suggest that many tampon brands do contain potentially toxic substances, though generally at very low levels.

Positive aspects of tampons include their convenience and effectiveness in managing menstrual flow. Negative aspects include the potential for toxic ingredients and the risk of toxic shock syndrome (TSS) if they are not used properly.

In summary, tampons are typically made of cotton, rayon, or a blend of both, and must be cleared by the FDA. While the FDA reviews data submitted by the manufacturer to ensure that both the tampon and the applicator are made with safe materials, some tampons may contain potentially toxic substances. Positive aspects of tampons include their convenience and effectiveness, while negative aspects include the potential for toxic ingredients and the risk of TSS if they are not used properly.