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In order to figure out how low testosterone changes a man’s body, the study team treated hundreds of guys with drugs that stopped production of all reproductive hormones—both testosterone and estrogen. The researchers then offered the men treatments that restored either testosterone and estrogen, or just T. Among the estrogen-deficient dudes, body fat accumulations were significantly greater—and both sexual desire and erectile function suffered—compared to men who received both T- and E-boosting drugs, the research shows....

Before ordering lunch, diners at McDonald’s restaurants in Brooklyn and Manhattan were given slips of paper containing either their daily recommended calorie counts or per-meal recommended calorie counts, while a control group received no recommended calorie information. After analyzing the meal choices of over 1,000 people, researchers found that individuals who received information about daily or per-meal calories tended to make the same lunch choices as those who did not get said calorie info....

Click here for a special message from First Lady Michelle Obama and to join Kids Get Cooking Day. Read on for highlights from Prevention Editor-in-Chief Diane Salvatore’s interview with Mrs. Obama, and get the full story in our March 2012 issue, on newsstands now. On staying healthy when every penny counts: “Clearly this is a tough economic time, and a lot of families are hurting. So when we talk to parents, we talk about small changes for kids and things that don’t cost extra money....

Of course, first you’ll want to rule out obstructive sleep apnea. OSA occurs when the muscles of the throat relax too much and block the airways, causing a person to stop breathing during sleep, sometimes up to hundreds of times a night, leading to daytime sleepiness and an increased risk for numerous health concerns, including heart problems. But if you don’t have sleep apnea and you’ve tried the fancy pillows, a handful of exercises might offer some relief, according to recent research....

Using fMRI technology, the study team tracked the brain health of 96 older adults. After 3.5 years, 12 of them had developed the early, mildest stages of Alzheimer’s. By comparing brain scans of those 12 at the start and end of the study period, and by contrasting those with the scans of the other 84 participants, the researchers say they’ve finally pinpointed the starting point of the disease. Alzheimer’s appears to show up first in a region of the brain called the lateral entorhinal cortex, or LEC, which the study authors say is the “gateway” to the hippocampus—the part of your brain responsible for consolidating long-term memories....

Maybe you’ve already heard of telomeres. In case you need a refresher, they’re small segments at the ends of your DNA’s chromosomes that serve as a sort-of buffer, protecting your body’s important genetic structures. That sounds complicated (and it is), but here’s all you really need to know: The more your telomeres wear down, the more likely your health is to worsen thanks to disease and, eventually, to death, according to lots of recent research....

We’ve rounded up some of our favorite nighttime adventures to inspire various active communities to go outside and get their sweat on, all with the aid of a headlamp or lantern illuminated with Duracell Quantum — it lasts longer in 99% of devices vs. the next leading competitive brand* — for long-lasting power that won’t leave you in the dark. Running: Midnight Races Runners have been taking on the darkest hours longer than most of their athletic counterparts....

Serves: 3–6 1/2 c uncooked wild rice 12 lg stuffing mushrooms, cleaned and stems removed 2–3 cremini mushrooms 1 c finely chopped white or yellow onion 1 oz pecorino or Parmesan cheese, finely grated 1/2 c finely chopped parsley, plus extra for garnish 1 Tbsp minced garlic 1/2 tsp dried thyme, crushed between fingers 1 tsp coconut oil 1 tsp freshly ground black pepper 1/4 tsp salt Place rice and 1½ cups of water in a saucepan and bring to a boil....

“Yoga [helps] lymph to flow more freely through fatty areas, flushing toxins and reducing cellulite,” Levitt says. Inversions—or upside-down positions—like these two are especially good for moving lymph along. Learn these poses from a teacher before attempting them on your own, then practice them once every other day for best results. Half Shoulder Stand 1. Lie on your back with your arms resting alongside your torso. 2. Bend your knees and curl them up toward your forehead....

See the complete list of 43 recalled peanut and nut butters here. The list includes unit UPCs and “Best By Date” ranges to watch out for. The possible contamination was discovered during a routine FDA testing and after four illnesses with possiby ties to the recall were reported. Symptoms of salmonella include fever, diarrhea (which may be bloody), nausea, vomiting, and abdominal pain. In more serious, rare cases, salmonella spreads through the intestines and blood stream and throughout the body, prompting an emergency situation....

[sidebar]Not sure where to find it? Fat-free and 1% milk, low-fat yogurt, vegetable juice cocktail, baby limas, kidney beans, and lentils are all rich in potassium. Other potassium-rich heart health foods include: 1 baked potato with skin (212 cal): 903 mg1 c prune juice (182 cal): 707 mg5 dried peach halves (156 cal): 648 mg1 baked potato without skin (156 cal): 641 mg1 c plain low-fat yogurt (130 cal): 520 mg½ c cooked Swiss chard (18 cal): 483 mg10 dried apricot halves (83 cal): 482 mg1 c orange juice from concentrate (112 cal): 473 mg1 banana (105 cal): 451 mg½ c cooked acorn squash, cubed (57 cal): 446 mg½ c cooked spinach (21 cal): 419 mg3/4 c tomato juice (31 cal): 400 mg...

4 pieces skinless salmon fillet (about 1 pound in all)1 tsp salt, divided¼ tsp black pepper, divided8 oz egg noodlesZest of 1 lemon2 Tbsp lemon juice2 Tbsp butter1 tsp extra virgin olive oil1½ tsp poppy seeds HEAT oven to 450°F and coat a rimmed baking sheet with cooking spray.2. SEASON 4 pieces skinless salmon fillet (about 1 pound in all) with ½ teaspoon salt and ⅛ teaspoon black pepper.3. PUT salmon, skinned side down, on pan and bake 12 to 15 minutes....

Researchers from Rice University tracked the texting habits of a group of men and women over six months, examining more than 124,000 texts to see just who’s using emoticons. The results: 100% of study participants—both men and women—used them. Women used them more often, but men were shown to be more creative with theirs. More from Prevention: Is Facebook Ruining Your Self-Esteem? Don’t overdo it, though, says Julie Spira, author of The Rules of Netiquette: How to Mind Your Manners on the Web....

What is clearly known is that women appear to have TMD symptoms at about twice the rate of men. “Research suggests women’s hormonal fluctuations during pregnancy and menopause may account for their higher incidence,” says John C. Moon, DDS. Fortunately in the majority of cases, TMD pain is temporary and can be relieved with simple measures. 21 Ways To Relieve The Pain From Temporomandibular Disorders Here are a few pain-fighting moves for TMD that our experts recommend....

You heard that right: If you work out too much, you’ll actually burn less calories overall. In the study, 72 women ages 60 to 74 were split into three groups: women who strength trained once a week and did aerobic activity once a week; women who strength trained twice a week and did aerobic activity twice a week; and women who strength trained three times a week and did aerobic activity three times a week....

A freight-and-physics challenge. Consider this: There was a time, maybe a half-century ago, when railroads finagled a way around overloaded trains or engines facing mountainous terrain. If the company plied a train with too much weight, workers hitched it to an engine up front and then hitched another engine behind the train to give it added momentum up steep hills. Your metabolism works something like a train engine. In midlife, metabolism slows like an overloaded train facing a heck of a hill....