The new PSA report: Understand the controversy

United States Preventive Services Task Force (USPSTF) latest recommendation on prostate-specific antigen (PSA) testing points out that before a man decides whether or not to have the test, he should fully understand that screening for early prostate cancer may do more harm than good. Any man who is considering getting a PSA test needs to understand both the positive and negative implications of the test. More »

Learning while you sleep: Dream or reality?

A good night's sleep restores mind and body, preparing both for the challenges that lie ahead. Without restful sleep, mood, concentration, and mental performance suffer. Sleep deprivation is a major cause of  accidents, and it has been linked to important medical problems ranging from hypertension, obesity, and diabetes to heart disease, erectile dysfunction, and possibly even prostate cancer. Health-conscious men don't take sleep for granted, and scientists don't either. In fact, research suggests that even a brief nap may help boost learning, memory, and creative problem solving — all while your head is on the pillow. More »

Obesity in America: What's driving the epidemic?

Obesity is a complex problem that scientists are still struggling to understand. In some cases, genetics seem responsible; in others, various combinations of hormonal, metabolic, and behavioral factors appear to play a role. The prevalence of obesity in the U.S. has increased by over 50%, so that two of every three American adults are now overweight or obese. Even worse, the obesity epidemic is rapidly spreading to our children. Diabetes, hypertension, and heart disease are consequences of obesity, as well as cancer, arthritis, and depression to kidney stones, fatty liver disease, and erectile dysfunction. Obesity and overweight account for nearly one of every 10 American deaths, and costs society $223 billion a year. In order to control the obesity epidemic, we must first understand its causes. Changes in the nature of work, leisure time activity, and changes in what and how much we eat are the most significant contributing factors to the explosion of obesity in America. (Locked) More »

Exercising with respiratory infections

I do my best to exercise every day, either walking two miles in good weather or riding my exercise bike for 30 minutes on wet or cold days. Should I keep going when I catch a cold, or would I be better off resting? (Locked) More »


When I awaken in the morning, I have terrible bad breath. My breath seems okay during the rest of the day, but I worry about developing halitosis. What causes bad breath? (Locked) More »