Scary health items include: chemicals and metals in household products, apples contaminated with pesticides, lipstick filled with heavy metals, carcinogens in water, sperm counts that don't add up, items that cause hormone disruptor issues, problems with lymph glands, etc. A variety of folks and organizations- scientists, NGOs, activists, politicians, journalists, media outlets, cranks and quacks continually harp about potential health threats like these and many others.