Staying Healthy Archive

Supplements aren't held to the same standards as FDA-approved drugs. Evidence indicates that few are effective, many are useless, and others may be harmful.

Image: Thinkstock

Dietary supplements—including herbs, vitamins, minerals, and other products—are a $37-billion industry in the United States, and 60% of women are taking them regularly. At the same time, mounting research is suggesting that supplements—even mainstays like calcium—may be harmful at high doses.

The use of supplements and other alternatives to standard treatments is centuries old, but Dr. David Eisenberg, adjunct associate professor at the Harvard T.H. Chan School of Public Health, was the first to document the widespread use of alternative therapies in the United States. In a 1993 article in The New England Journal of Medicine, Dr. Eisenberg and colleagues reported that more than a third of Americans were using unconventional therapies, largely for chronic conditions, and most were doing so without letting their clinicians know. That report covered acupuncture, spinal manipulation, massage, and yoga, but it also focused public attention on all unconventional treatments, including the growing use of herbal remedies and other dietary supplements. In 1998, the Office of Alternative Medicine in the National Institutes of Health (NIH) was revamped as the National Center for Complementary and Alternative Medicine and charged with funding rigorous studies into the safety and effectiveness of alternative physical treatments as well as popular dietary supplements and herbs.

Although risk calculators disagree, at some point age becomes the deciding factor in the decision to take a cholesterol-lowering medication.

Image: Thinkstock

If you've been diligent about monitoring your risk factors for developing heart disease, you may have realized that online calculators can be helpful. If you have the results from your latest cholesterol test, these online calculators can compute your chance of having a heart attack or stroke in the next decade:

• Framingham Risk Calculator http://cvdrisk.nhlbi.nih.gov

• ACC/AHA Heart Risk Calculator www.cvriskcalculator.com

• Reynolds Risk Score www.reynoldsriskscore.org

However, each may give you a slightly different number. And while the Framingham calculator might indicate that your risk is low and therefore you don't need a cholesterol-lowering statin drug, the ACC/AHA calculator could indicate that you should be taking a statin to reduce your risk.

If you're missing a few words but not ready for a hearing aid, a few simple strategies and smartphone apps may help.

 Image: iStock

Are you avoiding certain restaurants because they're too noisy? Do you catch yourself wondering what you just heard the radio announcer say? Are you wearing out the volume control on your remote? Chances are you have a bit of hearing loss.

It's easy to ignore a hearing loss because it can be subtle and gradual. And you may be in denial because you don't like the idea of wearing hearing aids. Yet struggling to hear can erode your quality of life.

There's mounting evidence that sitting for long periods can have health risks. However, little is known about how the effects of sitting can be countered by standing occasionally. A team of researchers from the United Kingdom and Australia designed a two-day study involving 22 overweight or obese postmenopausal women with high blood sugar who were at risk for diabetes. On the first day, the women were assigned to one of three groups. One group sat for 7.5 hours straight. The other two sat over a 7.5-hour period, but one group was told to stand in place for five minutes every half-hour, and the other was told to walk for five minutes every half-hour. The second day, all the groups sat for 7.5 hours straight.

On both days, the researchers tested each participant's blood levels of glucose, insulin, fatty acids, and triglycerides—all indicators of metabolism. They found that both walking and standing reduced glucose, insulin, and fatty acids—signs of a higher metabolic rate—in women who either stood or walked compared with those who sat the entire time. Moreover, in the two active groups, some of the beneficial effects persisted into the next day, when everyone sat for the entire session.

In the January Health Letter, we gave you suggestions for finding healthy frozen food entrees. Because of a typographical error, the text of the article incorrectly stated that you should look for 5 or fewer grams of fiber per serving. In contrast, the table (reproduced below) noted accurately that you should look for entrees with 5 or more grams of fiber per serving. We apologize for the error in the text.

They're convenient and affordable, but they don't replace a relationship with a primary care physician.

Walk into a drugstore, supermarket, or "big box" store these days, and you'll find more than prescriptions, food, and household goods. Many now feature health clinics. They're part of the big trend of making health care more convenient. "Twenty years ago you had to go to an emergency department if you got sick and needed immediate care. Now we have an explosion of options, such as retail health clinics," says Dr. Ateev Mehrotra, a researcher on the topic and an associate professor of health care policy at Harvard Medical School.

The clinics

Retail health clinics began showing up about 15 years ago. Today, there are about 2,000 clinics across the United States, mostly in large retail chain settings. A typical clinic is open from 7 a.m. to 7 p.m., seven days a week, and is staffed by a nurse practitioner or a physician assistant. Clinics offer all kinds of health services—everything from treating minor illness like a cold, pinkeye, or a urinary tract infection to providing physicals, health screenings, lab work, smoking cessation help, and vaccinations.

Ask the doctor

Q. I'm a 23-year-old man who reads my mother's copy of the Harvard Health Letter. You often talk about how regular exercise improves health, particularly heart health. Since heart disease doesn't usually start until a man is in his 60s, at what age should I get serious about exercise?

A. Right now. Probably five years ago would have been even better. I will admit that most of the studies linking regular exercise with health benefits have been done in adults over age 50. But recently a study from doctors at Johns Hopkins was published in the medical journal JAMA Internal Medicine that is directly relevant to you. The study enrolled nearly 5,000 young adults, ages 18 to 30, and followed them for nearly 27 years. These study participants came from different geographic areas in the United States and included both males and females and people of different racial and ethnic groups.

They're cute, cuddly, and loving, but dogs and cats aren't always appropriate for older adults.

There's a reason dogs are dubbed man's best friend. Dogs—and cats, too—make wonderful companions and provide many emotional and physical benefits. "I'm a believer in the beneficial effects of having a pet, and I'm impressed with the ability of dogs in particular to form bonds with human beings. I think the science is starting to support their special ability to do that," says psychiatrist Dr. Greg Fricchione, director of the Harvard-affiliated Benson-Henry Institute for Mind Body Medicine. However, there are a number of considerations to mull over before adding a pet to your household.

Benefits

The most obvious benefits of pet ownership are love and companionship. "We do best medically and emotionally when we feel securely attached to another, because we're mammals and that's the way we've evolved," says Dr. Fricchione. He points out that we feel especially secure with dogs and cats because of the unconditional love they provide. "No matter what you do or say, your dog or cat accepts you and is attached to you," says Dr. Fricchione. Taking care of a dog or a cat can provide a sense of purpose and a feeling of validation when you wake up or come home and there's someone who's happy to see you.