Environmental Medicine: Vitamin E vs. PCBs

Vitamin E vs. PCBs.

Studies by scientists at the University of Kentucky in Lexington indicate that vitamin E appears to be an effective protectant against damage resulting from exposure to polychlori-nated biphenyls (PCBs), toxic chemicals whose manufacture has been banned in the United States since 1977. Although out of use for nearly 30 years, PCBs still remain the object of intense research interest because of ...

Estrogenicity of environmental PCBs.

Estrogenicity of Environmental PCBs The paper by Bergeron, Crews, and McLachlan, "PCBs as Environmental Estrogens: Turtle Sex Determination as a Biomarker of Environmental Contamination" (EHP 102:780-781) presents data on the estrogenic activity of 11 chlorinated biphenyls or diphenyl ethers, or hydroxylated derivatives thereof, selected so as to represent a variety of structural types. Some of...

Assessing the cancer risk from environmental PCBs.

A new approach to assessing the cancer risk from environmental polychlorinated biphenyls (PCBs) considers both toxicity and environmental processes to make distinctions among environmental mixtures. New toxicity information from a 1996 cancer study of four commercial mixtures strengthens the case that all PCB mixtures can cause cancer, although different mixtures have different potencies. Envir...

Safety of prescribing PDE-5 inhibitors via e-medicine vs traditional medicine.

OBJECTIVE To determine the safety of a US-based, state-regulated Internet system vs a multispecialty primary care system for prescribing phosphodiesterase type 5 (PDE-5) inhibitors for erectile dysfunction. PATIENTS AND METHODS From January 1, 2001, through December 31, 2005, 500 e-medicine clients (mean+/-SD age, 47+/-11 years; hypertension, 60%; type 2 diabetes mellitus, 2%; mean+/-SD numbe...

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