Breast Cancer
This compound has been found intact within breast cancer tissues. Some researchers suggest that methylparaben may increase risk of breast cancer, or accelerate the growth of these tumors.
Skin and Eye Damage
Skin treated with creams that contain methylparaben can be damaged with exposure to the sun's UVB rays. This oxidative stress -- damage of the skin cells -- is responsible for a number of disease processes, including cancer.
Eye drops containing methylparaben, even in small amounts, can damage the lining of the eyes, as well as the cornea.