Nutrition basics
Learning Center
Aortic valve repair and aortic valve replacement
These types of heart valve surgeries are done to treat aortic valve disease, including aortic stenosis and aortic regurgitation.
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.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Arthritis pain: Do's and don'ts
Arthritis pain — To cope, strike a balance between activity and rest.
Artificial sweeteners and other sugar substitutes
Get the facts on products that make food and drinks sweeter.
Artificial tears: How to select eye drops for dry eyes
Not all eye drops are the same. Here's what to consider when choosing artificial tears for dry eyes.
Ascariasis
Learn more about the causes, treatment and prevention of this roundworm infection.
Asthma diet: Does what you eat make a difference?
Can what you eat affect your asthma? Learn how healthy eating habits may reduce asthma symptoms.
Asthma in children: Creating an asthma action plan
Managing childhood asthma can be complicated. Take control with a written plan.
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