happy, healthy and...

You Are Also What You Drink
By JANE E. BRODY, NY Times News Service


Coffee, Tea and Caffeine. Here the news is better. Several good studies have linked regular coffee consumption to a reduced risk of developing Type 2 diabetes, colorectal cancer and, in men and in women who have not taken postmenopausal hormones, Parkinson's disease.

Most studies have not linked a high intake of either coffee or caffeine to heart disease, even though caffeinated coffee raises blood pressure somewhat and boiled unfiltered coffee (French-pressed and espresso) raises harmful LDL and total cholesterol levels.

Caffeine itself is not thought to be a problem for health or water balance in the body, up to 400 milligrams a day (the amount in about 30 ounces of brewed coffee). But pregnant women should limit their intake because more than 300 milligrams a day might increase the risk of miscarriage and low birth weight, the panel said.

Mice prone to an Alzheimer's-like disease were protected by drinking water spiked with caffeine equivalent to what people get from five cups of coffee a day. And a study of more than 600 men suggested that drinking three cups of coffee a day protects against age-related memory and thinking deficits.

For tea, the evidence on health benefits is mixed and sometimes conflicting. Tea lowers cancer risk in experimental animals, but the effects in people are unknown. It may benefit bone density and help prevent kidney stones and tooth decay. And four or five cups of black tea daily helps arteries expand and thus may improve blood flow to the heart.

Alcohol. Alcohol is a classic case of "a little may be better than none but a lot is worse than a little." Moderate consumption—one drink a day for women and two for men—has been linked in many large, long-term studies to lower mortality rates, especially from heart attacks and strokes, and may also lower the risk of Type 2 diabetes and gallstones. The panel found no convincing evidence that one form of alcohol, including red wine, was better than another.

But alcohol even at moderate intakes raises the risk of birth defects and breast cancer, possibly because it interferes with folate, an essential B vitamin. And heavy alcohol consumption is associated with several lethal cancers, cirrhosis of the liver, hemorrhagic stroke, hypertension, dementia and some forms of heart disease.