The latest research indicates that so called light cigarettes deliver nearly as much nicotine to the brain as regular cigarettes. University of California, Los Angeles, found that light cigarettes have nicotine levels of 0.6 to 1 milligram, while regular cigarettes contain between 1.2 and 1.4 milligrams.

The researchers also looked at de-nicotinized cigarettes, which contain only a trace amount of nicotine. They found that even the smallest amount of nicotine in a person's system will activate a significant percentage of receptors in the brain making light cigarettes addictive and tough to quit

Women who take hormone replacement therapy (HRT) do not face an increased risk of heart attack, a new study confirms.

Though the breast cancer experts recommend avoiding or limiting hormone replacement therapy, but a new study by Danish researchers suggests that if a woman uses a cream or skin patch or takes alternate hormone combinations, the risk of heart attack is less

The anthrax vaccine appears to be just as effective and causes few side effects if its dosage is reduced and its administration is changed to intramuscular injection, new study has found.

The current anthrax vaccine adsorbed (AVA) vaccine is given in six doses -- at zero, two and four weeks then again at six, 12 and 18 months -- below the skin, or subcutaneously, with annual boosters

Researchers have found a genetic link between obesity and colon cancer that may help pave the way for more effective screening tests for the disease. It may also lead to greater accuracy in predicting the people who are at the greatest risk of the disease, experts say.

People who inherit a variation of a gene called ADIPOQ, which results in the formation of a fat hormone called adiponectin, are 30 percent less likely to develop colon cancer, say researchers from University of Alabama Comprehensive Cancer Center

With a large number of children waiting for heart transplants, researchers have now developed miniature pumps known as ventricular assist devices to help them bridge the gap to transplantation.

The device, which has been successfully used in children younger than 5, takes over for a damaged heart and helps keep the patient alive as they wait for a long time until a donated organ is available, a study found