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People with addiction lose control over their actions. They crave and seek out drugs, alcohol, or other substances no matter what the cost—even at the risk of damaging friendships, hurting family, or losing jobs. What is it about addiction that makes people behave in such destructive ways? And why is it so hard to quit?

Oral health is important for people of all ages. But the simple routine you learned as a kid—brush your teeth twice a day and floss regularly—can become more of a challenge as you get older. Among adults ages 75 and up, about 1 in 4 has lost all natural teeth, largely because of gum disease and tooth decay.

With the growing popularity of gluten-free products at your local grocery store, you may have wondered if you should avoid eating gluten. Sidestepping gluten can be a lifestyle choice for many. But for those with a condition known as celiac disease, it’s a medical necessity.

As a child in school, did you ever struggle to see what the teacher wrote on the board? Maybe you could easily read from a book, but things farther away—like highway signs—looked blurry. Blurry distant vision is the main symptom of myopia, a condition that affects about a third of American adults.

Learn what NIH expects Data Management & Sharing plans to address.

for osteoporosis, a condition that affects more than 10 million people nationwide.

Vitamin D deficiency has been linked to heart disease and type 2 diabetes.

Clear and honest communication between you and your physician can help you both make smart choices about your health.