Of all the health issues that loom large with age, memory loss is among those that provoke the most worry. A big reason is the uncertainty: people often wonder if their occasional memory slips are just a normal part of growing old or a sign of impending Alzheimer’s disease, the most common form of dementia. A new study of older adults, published in today’s issue of the journal Neurology, sheds some light—and perhaps offers a bit of reassurance—about the connection between self-reported memory loss and a diagnosis of dementia. Over a 10-year period as 70-somethings turned into 80-somethings, about 1 in 6 developed dementia. About 80% had reported memory changes. But it took about nine years from the first self-report of a memory change to a diagnosis of mild cognitive impairment, an intermediate stage between normal memory loss and dementia. The transition to dementia usually took about 12 years.
Posts by Julie Corliss
Probiotics, the beneficial bacteria found in yogurt and other cultured foods, have long been touted for their ability to ease digestive woes. The strongest evidence for probiotics is in treating diarrhea caused by a viral infection or from taking antibiotics. Do probiotics also work for the opposite problem — constipation? A report from King’s College in London showed that taking probiotics can help soften stools, making them easier to pass, and can increase the number of weekly bowel movements. What we don’t know is which probiotic species and strains are most effective, how much to take, and for how long.
In the folk song “Dem Bones,” every bone is connected to the next one in line. Here’s an interesting wrinkle on that idea: The gum bone, or at least problems with it, are connected to all sorts of health problems. Gum disease—which begins when the sticky, bacteria-laden film known as plaque builds up around your teeth—is closely linked to premature birth, heart disease, diabetes, and other chronic health problems. Now, a report in the August issue of the American Journal of Preventive Medicine finds that treating gum disease (also called periodontal disease) can lead to better health — as evidenced by lower health care costs and fewer hospitalizations — among people with common health conditions. The common thread between gum disease and chronic health conditions is inflammation. Eliminating the gum infection may dampen that harmful response throughout the body.
Nearly 7 million adults in the United States suffer from psoriasis. This condition is characterized by red patches of skin covered with silvery scales, often on the elbows and knees. But today doctors understand psoriasis as an inflammatory condition that may affect more than just the skin. People with psoriasis are more likely to have other conditions linked to inflammation, including heart disease, diabetes, obesity, and inflammatory bowel diseases such as Crohn’s disease and ulcerative colitis. And nearly a third of people with psoriasis develop psoriatic arthritis, which causes stiff, painful joints and other debilitating symptoms. Several studies suggest that weight loss and vigorous exercise, both of which help combat inflammation, may help thwart psoriasis as well.
Dietary supplements are big business, even though few of the 85,000 products on the market have proven benefits. An article in JAMA Internal Medicine highlights a bizarre case of supplement overuse: a man, worried about memory loss, was spending nearly $3,000 a month on more than 50 supplements recommended by his “anti-aging” physician, plus hundreds of dollars more on other products he chose himself. Most of the products had no proven benefit on memory, and some may have contributed to the memory loss he was so worried about. had possible negative effects on brain function. People often assume that dietary supplements are effective, because of the claims they make, and are harmless, because they are “natural.” Not so. Unlike pharmaceuticals, which undergo extensive testing to prove they’re effective and safe before they can be sold, dietary supplements can be sold with without proof of effectiveness, safety, or purity.
Fish and shellfish are great sources of lean protein, and many types are rich in heart-healthy omega-3 fatty acids. But there’s a catch: some species of fish contain worrisome amounts of methylmercury, a toxin that’s especially dangerous to developing brains. That’s why women who are or could become pregnant and young children shouldn’t eat high-mercury fish such as swordfish, shark, king mackerel, and tilefish. A new study hints that eating too much—or the wrong kind—of salmon and tuna can also boost mercury levels. But the study also offered reassurance: 95% of the nearly 11,000 people surveyed, including those who ate fish often, had blood mercury levels in the safe zone.
Cardiologists from around the world have gathered in Washington, DC, for the 65th annual meeting of the American College of Cardiology in Washington, DC. During the opening lecture, Dr. Gary Gibbons, director of the National Heart, Lung, and Blood Institute, talked about the “challenge of success.” What does that mean? Since 1950, death rates from cardiovascular disease have plummeted by 70%, thanks to two major trends. One is the decline in smoking and improvements in cholesterol and blood pressure. The other is the boom in new therapies, including better medications, surgeries, and high-tech procedures to repair an array of heart problems. The challenge today is finding a new drug or procedure that raises this already high bar. Here’s a summary of four reports, two negative and two positive, of studies on new treatments for heart disease.
The next time you have your blood pressure checked, ask your health care to check it in both arms, rather than just in one. Why? A big difference between the two readings can give you an early warning about increased risk of cardiovascular disease, a new study suggests. Harvard researchers found that people who have a 10-point difference in blood pressure from one arm to the other are 38% more likely to have a heart attack, stroke, or a related problem than those with arm-to arm differences less than 10 points. Small differences in blood pressure readings between the right and left arm are normal. But large ones suggest the presence of artery-clogging plaque in the vessel that supplies blood to the arm with higher blood pressure. Clogging there means there’s a good chance the arteries in the heart and brain are also clogged, boosting the odds of having a heart attack or stroke.
A sugar-laden diet boosts the chances of dying of heart disease even among people who aren’t overweight. So says a major study published online this week in JAMA Internal Medicine. Over the course of the 15-year study, individuals who took in 25% or more of their daily calories as sugar were more than twice as likely to die from heart disease as those whose diets included less than 10% added sugar. Overall, the odds of dying from heart disease rose in tandem with the percentage of sugar in the diet—and that was true regardless of a person’s age, sex, physical activity level, and body-mass index (a measure of weight). Sugar-sweetened beverages such as sodas, energy drinks, and sports drinks are by far the biggest sources of added sugar in the average American’s diet. They account for more than one-third of the added sugar we consume as a nation. Other important sources include cookies, cakes, pastries, and similar treats; fruit drinks; ice cream, frozen yogurt and the like; candy; and ready-to-eat cereals.
Many people practice meditation in hopes of staving off stress and stress-related health problems, even though the evidence for doing so is spotty. A new study that analyzed the results of nearly 50 solid clinical trials of meditation shows that mindfulness meditation can help ease psychological stresses like anxiety, depression, and pain. One way it does this is by training you to experience anxious thoughts or stresses in completely different and less emotionally disturbing ways. Mindfulness-based stress reduction training, developed by Dr. Jon Kabat-Zinn at the University of Massachusetts Medical School in Worcester, MA, is now widely available in cities throughout the United States. You can also learn it yourself from books or online recordings. Or try this short meditation, from the Zen Buddhist monk Thich Nhat Hahn: “Breathing in, I calm my body. Breathing out, I smile. Dwelling in the present moment, I know this is a wonderful moment.”