Nutrition basics
Learning Center
Alcohol: Does it affect blood pressure?
Drinking too much alcohol can raise blood pressure to unhealthy levels.
Alkaline water: Better than plain water?
Health claims about alkaline water abound, but plain water is usually best.
Allergy skin tests
Considering skin testing for your allergies? Learn about the risks, results and what to expect during testing.
Alzheimer's genes: Are you at risk?
What role do genes play in developing Alzheimer's? Are you at risk?
Alzheimer's: Can a head injury increase my risk?
Some research indicates a link between head injuries and Alzheimer's disease. So what's your risk?
Angelman syndrome
Learn about this genetic disorder that causes developmental delays, problems with speech and other symptoms.
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Aortic valve repair and aortic valve replacement
Find out how valve repair and replacement can treat aortic valve stenosis, aortic valve regurgitation and congenital heart disease.
Aortic valve stenosis
Learn more about the symptoms and treatment of this condition that reduces or blocks blood flow from the heart to the body.
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.
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