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His bold theory: An infection, whether an inflamed cut or a bad cold, seemed to switch the immune system into high gear, spurring it to attack everything in sight—including malignant tumors. But could science replicate the effect in a drug? Nope. Not for more than a century, anyway. The shift begins. Finally, in recent years, clinical trials have revealed the truth—Coley was right all along. When we manipulate the on/off switches of our immune system’s fiercest fighters, these T cells, as they’re called, seek and destroy metastatic cancer....

The error first came to light in October 2014, when two public health scientists at the University of Alberta published as a study in the journal Nutrients. They went back through the IOMs studies and discovered a statistical mistake: The institute had based its vitamin D recommendations upon an average that was far too low to achieve healthy levels of D in the blood. After rerunning the numbers, they discovered that adults might need more than 8,000 IU to reach safe levels, though the researchers hesitated to recommend such high doses since none of the volunteers in the studies had taken more than 2400 IU daily....

“The real boost from strength training comes after you leave the gym,” says Holly Perkins, CSCS, author of the new book Women’s Health Lift to Get Lean. “Your body starts the repair and recovery process.” MORE: A Woman’s Guide to Strength Training for Beginners Ready to really commit to making a difference in your muscle tone (and the way you feel)? Perkins suggests these five tips for speeding up your strength gains: The article 5 Tips For Speedier Strength Gains was adapted from Women’s Health Lift to Get Lean and originally ran on Fitbie....

How does napping work its brain magic? “It may protect brain circuits from overuse until those neurons can consolidate what’s been learned about a procedure,” says Robert Stickgold, PhD, coauthor of the Harvard study. More from Prevention: 10 Tips To Get Your Best Night’s Sleep Unless you know the correct way to conduct a daytime doze, however, you could snooze and lose. “Napping can steal the drive for nighttime sleep, so you need to be cautious,” says David Neubauer, MD, associate director of the Johns Hopkins Sleep Disorders Center....

MORE: The Best Hair Colors For Women Over 40 Protect your assets with this damage-minimizing strategy from Nicole Rogers, a hair-transplant surgeon and Tulane University assistant clinical professor of dermatology: Prep for straightening or curling with a spray containing silicone or dimethicone: Both absorb damaging heat. One to try: Alterna Caviar Anti-Aging Rapid Repair Spray ($30, amazon.com). MORE: 9 Haircuts That Take Off Years 2. Use wands, irons, and dryers (the nozzle should be 6 inches away from strands) at the lowest possible heat settings....

[sidebar]Although most Americans drink plenty of fluids throughout the day, exercise time seems to be a common low-water point. “We generally replace fluids at mealtimes, and we tend to exercise hours before or after eating,” says hydration expert Michael Sawka, PhD, of the US Army Research Institute of Environmental Medicine. “Being even a little dehydrated can make you feel lethargic when you’re trying to exercise,” he says. To get the most from your workouts, top off your tank with 8 ounces of water during the hour before you exercise....

While you’re snoozing, there’s a lot going on cranially, says study author Andrei Medvedev, PhD, an assistant professor in the Center for Functional and Molecular Imaging at Georgetown University. He outfitted 15 participants with caps full of optical fibers (sort of like wearing a high-tech shower cap) and told them to relax and clear their minds for up to eight minutes. Medvedev noticed something strange happening: The right brain exhibited much higher levels of activity....

It wasn’t porn or spam but rather OMGYes.com, a research-based sex ed site that—I soon learned—doesn’t blush about vaginas. Committed to demystifying the science of female sexual pleasure, OMGYes has been lauded by users including Emma Watson as a direct path to better orgasms, whether solo or with a partner. (Check out how your vagina changes in your 30s, 40s, 50s, and 60s.) For $29, you can currently access its first “season”—essentially an online course you take at your own pace, with 12 modules on topics from “accenting” to “orbiting....

MORE: We Tried It: Coffee with 40 Times More Caffeine So how many cups of joe does it take to make you keel over? Check out this fascinating new vid from ASAPScience for the answer—and learn the lethal doses of other popular substances, too.

“I get why this stuff worries you,” Comite says soothingly. “But a lot of what’s wrong can be completely reversed.” An over-promise? Quite possibly. But one I’d like to believe right now? Absolutely. The idea behind precision medicine—which eschews one-size-fits-all approaches in favor of interventions that are highly customized for the particulars of you—is this: The more specific our medical treatment can be to our own corpus, the better our chances of sidestepping disease and feeling, not to mention looking, our best well into later life....

This weekend will be a special one for Julie Weiss: For the first time in an entire year, she won’t be going for a run. But we’re not talking about a jog around the block: Weiss, 42, is also known as the “Marathon Goddess” because she’s just finished her 52nd marathon in 52 weekends to raise awareness for pancreatic cancer, the disease that took her father’s life. When we heard about Weiss, who works as an accountant when she isn’t sprinting toward finish lines, we had more than a couple of questions for her....

[sidebar] Media Platforms Design TeamTHEN: Sunblock NOW: Sunscreen Sunblock. This word, once touted on labels, is out. “Block” implies total protection, but even SPF 100 falls just short, sidelining 99% of UV rays, says Mona Gohara, MD, a Yale-affiliated dermatologist. Sunscreen. A sun-protection product must now be sold as “sunscreen” instead. This label more accurately conveys what the ingredients do: absorb or reflect UV light. They don’t block it. Media Platforms Design TeamTHEN: SPF NOW: Broad Spectrum SPF SPF....

The research: After reviewing studies linking motor vehicle use with a higher incidence of Legionnaire’s, researchers from Arizona State University sought to find out why Legionella bacteria (which are transmitted via mist or vapor) could be associated with driving a car. So they attempted to grow the bacteria in a variety of washer fluid concentrations and found that the concentration of bacteria increased over time and lived for up to 14 months....

Instead of 17.5 oz strawberry smoothie (290 cal) Go for 16 oz Jamba Juice Jamba Light Strawberry Nirvana smoothie with real fruit (150 cal) Daily savings: 140 caloriesEnough to lose 15 pounds in 1 year* Instead of 16 oz lemonade (220 cal) Go for 15.2 oz Tropicana Fruit Squeeze Summer Lemon Drinks (35 cal) Daily savings: 185 calories Enough to lower your BMI by an average of 2 points in 6 months* Instead of 12 oz chai iced tea latte (200 cal) Go for 8 oz iced brewed chai tea with 2 Tbsp fat-free milk (11 cal) Daily savings: 189 calories Equal to eating 1 fewer slice of pizza Instead of 16 oz peach iced tea (200 cal) Go for 16 oz Inko’s White Unsweetened Honeysuckle iced tea (0 cal) Daily savings: 200 calories Amount you’d save by not eating 1 chocolate-frosted doughnut Instead of 16 oz orange soda (238 cal)Go for 16 oz Nestle Pure Life Tropical Fruit Splash flavored water (0 cal)Daily savings: 238 calories Amount you’d burn in 60 minutes of 3 mph pace walking* *Calculations based on a 150 lb woman MORE: 25 Slimming Sassy Water Recipes

There are phases of my life when I find myself doing this rapid fire eating. As I get older, I face a new frontier of stress. These days I’m facing serious illness with my parents. I’m finding that I rushing around as if moving fast will make them well. I’m grateful for the awareness and I bring myself back to meditation. This prompts me to eat in silence, and not in front of a newspaper, a computer, the television or while multi-tasking....

“What concerns us the most at this point, in addition to animals dying for cosmetics, is that companies quietly began paying for animal testing again without telling anybody,” says Kathy Guillermo, vice president of laboratory investigation at PETA. “These are companies that have enjoyed the support of millions of consumers because they took a strong stance against animal testing.” More from Prevention: 5 Ways To Tell If Your Beauty Products Are Vegetarian Mary Kay is currently taking steps to work with officials in China to consider non-animal-testing alternatives, says PETA....

[block:bean=pvn-survey-walking-a-062015]Can I figure out what my breast cancer risk is? Yes, kind of. Risk is most commonly calculated using the Gail Model, which will tell you your 5-year risk of developing breast cancer and your lifetime risk. But it won’t tell you when to start getting a mammo or how often to get it. (Find out 9 things that could impact your breast cancer risk.) There’s currently no clear-cut way to do that....

The Expert: Lee Scott, a Toronto-based walking coach and creator of the DVD Simple Secrets for a Great Walking Workout, designed these routines. 1. Walk Off Weight Mini sessions build up gradually, burning more calories as you progress while keeping joints pain free. Extra weight puts more impact on your hips and knees, but every pound you drop takes 4 pounds of pressure off joints! Ensure Success Divvy it up Research shows that short workouts can add up to the same weight loss and health benefits as one long session, but they feel more manageable, helping you stick with your routine....

Researchers at Northumbria University asked 12 physically active men to hit treadmills in the morning—some on an empty stomach, and some who had eaten breakfast. The results? Early workouts didn’t cause participants to feel hungrier or eat more throughout the day, and those who exercised in a fasted state burned 20% more fat than those who chowed down prior to sweating. This news may be easy enough for early birds to swallow, but what if you’ve got a profound relationship with your snooze button?...