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If you don't mind pricking a finger, you can check your cholesterol without sitting around in a doctor's waiting room or laboratory. Devices available in pharmacies or through the Internet make this easy to do at home. But is it worth doing?

The makers of home cholesterol tests rightly tout their products as faster than visiting a doctor. You prick your finger, gently squeeze a few drops of blood onto a test strip or into a small "well," and you get the results in a few minutes, instead of waiting a few days.

There are many opportunities to join a clinical trial, and you may be surprised at what you can learn about your health.

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You no doubt have seen advertisements asking people to join a clinical trial and thought they don't apply to you. But perhaps you should reconsider.

"People have a vested interest in the outcome of research trials, since these studies address many issues they want to avoid or better manage, such as cancer, diabetes, blood pressure, and dementia," says Dr. Howard Sesso, an epidemiologist with the division of preventive medicine at Harvard-affiliated Brigham and Women's Hospital.

After an artery-opening angioplasty plus a stent, a person may need bypass surgery in the future. Likewise, some people who have bypass surgery may later need a stent. Neither procedure stops atherosclerosis, the disease that clogs heart arteries. 

The FDA approved the first artery-opening stent made from a substance that biodegrades in about three years. The new stents appear to work as well as older metal stents, but blood clots may be more likely to form inside the absorbable stents. 

Strong core muscles and overall fitness are linked to shorter surgical recovery times.

Fasting for eight to 12 hours before a cholesterol test doesn’t seem to be necessary. But for now, people should continue to follow their physicians’ advice on this matter.

Bariatric surgery can dramatically improve type 2 diabetes and other risks for heart disease.

The latest statistics on obesity suggest that this disease remains a huge problem in the United States: nearly one in three American adults meet the criteria for obesity. What's more, about one in 10 women and one in 20 men are considered extremely obese (see "Obesity in the extreme").

People with extreme obesity face a high risk of cardiovascular disease and myriad other health problems, as well as a shortened life span. Most have struggled with excess weight since childhood or early adulthood, and many have undergone multiple, frustrating attempts to shed pounds. For some, weight-loss surgery (also known as bariatric surgery) may be the best—perhaps only—option for lasting weight loss.

Men should always seek out a second medical opinion anytime they are given a diagnosis of serious illness or a recommendation for surgery. Also, when seeking a second opinion, it is best to visit a different medical center to get a truly independent diagnosis, and to bring along a family member or friend to accurately record the new information.

Used alone or with hormone therapy, radiation can be a viable option for men at any stage of prostate cancer.

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Nowadays, men diagnosed with prostate cancer are often given two treatment choices, on opposite ends of the spectrum. First is active surveillance, where you forgo immediate treatment and monitor the cancer's growth. The other is surgery to remove the cancerous prostate.

But an in-between option might be a better choice for men who do not want the anxiety of wait-and-see or the physical hardship of surgery: radiation therapy.