- #Long term studies prove meat and dairy live longer skin#
- #Long term studies prove meat and dairy live longer series#
Top of Page What Happens To PCBs When They Enter The Eniviornment?īefore 1977, PCBs entered the air, water, and soil during their manufacture and use in the United States. Consumer products that may contain PCBs include old fluorescent lighting fixtures, electrical devices or appliances containing PCB capacitors made before PCB use was stopped, old microscope oil, and old hydraulic oil. The manufacture of PCBs stopped in the United States in August 1977 because there was evidence that PCBs build up in the environment and may cause harmful effects. Because they don't burn easily and are good insulating materials, PCBs were used widely as coolants and lubricants in transformers, capacitors, and other electrical equipment. For example, the name Aroclor 1254 means that the mixture contains approximately 54% chlorine by weight, as indicated by the second two digits in the name. Some commercial PCB mixtures are known in the United States by their industrial trade name, Aroclor. These seven kinds of PCB mixtures include 35% of all the PCBs commercially produced and 98% of PCBs sold in the United States since 1970. Because the health effects of environmental mixtures of PCBs are difficult to evaluate, most of the information in this toxicological profile is about seven types of PCB mixtures that were commercially produced. PCBs enter the environment as mixtures containing a variety of individual chlorinated biphenyl components, known as congeners, as well as impurities. Some PCBs are volatile and may exist as a vapor in air. PCBs are either oily liquids or solids and are colorless to light yellow. There are no known natural sources of PCBs in the environment. PCBs are a group of synthetic organic chemicals that can cause a number of different harmful effects. You must also consider the other chemicals you're exposed to and your age, sex, diet, family traits, lifestyle, and state of health. These factors include the dose (how much), the duration (how long), and how you come in contact with them. If you are exposed to PCBs, many factors determine whether you'll be harmed.
#Long term studies prove meat and dairy live longer skin#
You may be exposed by breathing, eating, or drinking the substance, or by skin contact. You are exposed to a substance only when you come in contact with it. This release does not always lead to exposure. When a substance is released from a large area, such as an industrial plant, or from a container, such as a drum or bottle, it enters the environment. This information is important because exposure to PCBs may harm you and because these sites may be sources of exposure.
As more sites are evaluated, the sites at which PCBs are found may increase. However, the total number of NPL sites evaluated for PCBs is not known. PCBs have been found in at least 500 of the 1,598 current or former NPL sites. These sites make up the National Priorities List (NPL) and are the sites targeted for long-term federal cleanup activities. The Environmental Protection Agency (EPA) identifies the most serious hazardous waste sites in the nation. This public health statement tells you about polychlorinated biphenyls (PCBs) and the effects of exposure. For more information, call the ATSDR Information Center at 1-88. The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present. This information is important because this substance may harm you. A shorter version, the ToxFAQs™, is also available.
#Long term studies prove meat and dairy live longer series#
It is one in a series of Public Health Statements about hazardous substances and their health effects. This Public Health Statement is the summary chapter from the Toxicological Profile for Polychlorinated Biphenyls (PCBs).
How Can Families Reduce the Risk of Exposure to PCBs?.
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