Nutrition basics
Learning Center
Does zinc work for colds?
The jury is still out on that question because many zinc studies, both those that find it beneficial and those that don't, are flawed. In studies with positive results, zinc lozenges or syrup appeared to shorten a cold by one day and seemed most effective when taken within 24 hours of the start of symptoms. Taking zinc lozenges with food may reduce side effects, such as a bad taste and nausea. Steer clear of zinc nasal spray, however, which may permanently damage your sense of smell.
Are energy drinks bull?
Thanks to a large amount of sugar and caffeine, energy drinks might give you a temporary energy boost. But too much sugar from energy drinks can add extra pounds. And too much caffeine can cause adverse side effects, such as nervousness, stomach upset, irritability, increased heart rate and insomnia. There are better ways to boost your energy. For example, get enough sleep, exercise regularly and eat a healthy diet.
Time to cut back on caffeine?
That morning cup of coffee or early afternoon soda is probably OK. But more than 400 milligrams of caffeine a day, or more than about four cups of coffee, can cause insomnia, restlessness, headaches and other problems. Start paying attention to how much caffeine you're getting from foods and beverages. Check labels. If you decide to cut back, do it gradually. For example, drink a smaller cup of coffee each day. This will help your body get used to the lower levels of caffeine and lessen potential withdrawal effects.
Fiber: Soluble or insoluble?
You need both types of fiber in your diet. Soluble, which dissolves in water, can help lower cholesterol and glucose levels. Good sources of soluble fiber include oats, beans, apples, citrus fruits, carrots and barley. Insoluble fiber, which doesn't dissolve in water, promotes the movement of material through your digestive system and can help with constipation or irregular stools. Good sources of insoluble fiber include whole-wheat flour, wheat bran, nuts and many vegetables.
Stress and headaches: Stop the cycle
Stress can make your head hurt, and a headache can really stress you out. Either way, you can rein in the pain with these tips to keep stress under control: 1. Simplify. Ask yourself what really needs to be done and what can be dropped. 2. Delegate. Look over your to-do list and delegate what you can. 3. Laugh. Staying positive with humor is a great way to relieve stress. 4. Relax. When you feel your muscles begin to tense, breathe deeply. Focus on inhaling and exhaling deeply and slowly for at least 10 minutes. 5. Exercise. Regular exercise provides a healthy break from the stress of daily life.
Don't believe shaving myths
Contrary to popular belief, shaving hair doesn't make it grow back thicker. And shaving doesn't affect how dark your hair is or how fast it grows. Shaving facial or body hair gives the hair a blunt tip that can feel coarse as the hair grows out. During this phase, the hair might appear darker or thicker, but it's not.
Eat more of these key nutrients
The typical American diet is low in fiber, vitamin D, calcium, iron and potassium. For this reason, they're listed on the Nutrition Facts label to encourage Americans to choose foods rich in these important nutrients.
Don't go cuckoo for coconut water
Coconut water is the clear fluid inside coconuts. Because it has natural electrolytes, such as potassium, sodium and manganese, it's popular for rehydration after exercise. But coconut water isn't calorie-free, which means plain water is still the smart choice for a post-workout drink.
Juicing is no substitute for whole foods
Juicing fresh fruits and vegetables produces a liquid that contains most of the vitamins, minerals and phytonutrients found in the whole fruit or vegetable. However, healthy fiber is lost during most juicing. So be sure your diet also includes a variety of whole fruits and vegetables.