6 Chemical Classes
1. Highly Fluorinated Chemicals
These chemicals are used in various consumer products, such as cookware, clothing, carpeting, and food packaging materials. These chemicals are also used as surfactants in firefighting foams. In particular, two C8 fluorochemicals, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), have been associated with adverse health effects in humans. Primarily, these chemicals have been positively associated with testicular and kidney cancers, as well as liver malfunction. In 2009, the EPA has set recommendations, which define safe/unsafe exposure levels within drinking water. Overall, more research is required to further support evidence which has suggested that fluorinated chemicals have adverse effects on human health.
2. Chlorinated Antimicrobials: Triclosan and Triclocarban
These chemicals are used to prevent the growth of bacteria. They were originally used in hospital settings, and are now used in many consumer products, such as detergent, soap, shampoo, deodorant, body lotion, cosmetics, toothpaste, mouthwash and clothing. In addition, Triclosan can be found embedded into plastics used to make furniture, fitness mats, toys, and cutting boards. Primarily, these chemicals are used to decrease bacterial levels on surfaces that come in contact with humans. Many of us are exposed to these chemicals on a regular basis, and the CDC has found that 75% of Americans tested positive for these substances in their urine. These chemicals have been found to disrupt the estrogenic, androgenic and thyroidal systems, and increase the effects of naturally occurring estrogen. These chemicals are released in high levels from sewage plants, and may pose an environmental hazard as well. However, these chemicals are not known to be dangerous to human health, and more research is required to understand if they pose as a health hazard to humans
3. Brominated, Chlorinated, and Phosphate-Containing Flame Retardants
Flame retardants are used to prevent the ignition and spread of fire. They are found in furniture, baby products, electronics, building insulation, and wire and cable. Many of these flame retardants contain organohalogens, which are often found to be toxic. As these chemicals are found in many products that we are regularly exposed to on a daily basis, nearly all Americans have been found to have tested positive for organohalogen flame retardants in their blood and body tissues. Levels of these chemicals have been found to be highest in children. The adverse effects of these chemicals is well-known, and includes reduced IQ, fertility, birth defects, and hormonal changes.
4. Bisphenols and Phthalates
These chemicals are commonly found within plastic products, and are used to harden plastics, as well as make them clearer. They can be found in food and drinking water, as well as in the ambient air and soil. As we rely heavily on plastics throughout our day-to-day lives, may of us are exposed to high level of these substances. Primarily, these substances act as endocrine disruptors, and have been found to cause type I diabetes, thyroid diseases, childhood obesity, asthma, and other neurological disorders. Currently, more research is needed for the design of safer alternatives.
5. Organic Solvents
Solvents are used to dissolve materials. Many consumer products contain solvents, such as paints, coatings, inks, adhesives, nail polishes and removers, paint strippers and cleaning and degreasing products. Of the most common solvents used in consumer products include water and organic-based solvents, which include hydrocarbons, oxygenated hydrocarbons, and halogenated hydrocarbon solvents. The products are known to be harmful to human health. Primarily, we are exposed to these products through inhalation, because they evaporate quickly, upon being exposed to air. Exposures can lead to neurotoxicity, live and kidney damage, carcinogenic effects, and reproductive toxicity.
6. Certain Metals
Metals are naturally occurring, and are often released into the environment through the mining process. Certain metals can be harmful to human health, and these include mercury, lead, arsenic, cadmium, and chromium. As these metals are widely used in consumer products, we are exposed to such toxins that are harmful to human health. Some of these metals, such as mercury, can be inhaled as a vapor, or ingested through foods. These metals can cause nervous system disorders, memory loss, blindness, hearing loss, and decreased cognitive functions. Moreover, many of these substances can be carcinogenic to humans.