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This test measures 2 types of insulin in your body: total and free. The test can help diagnose low blood sugar, or hypoglycemia.

Many people don't know the facts about hepatitis C. You may be concerned about things you've heard. Read on to learn what's true about the hepatitis C virus (HCV) and what's not.

Hepatitis C is a disease that damages your liver. It can cause major health problems. You can even die from it. And you might not even know you have it. Hepatitis C is caused by the hepatitis C virus (HCV). This virus spreads from person to person through blood. You're at risk for hepatitis C if infected blood enters your body.

Hepatitis C can be a lifelong condition if not treated. But it is curable. You can manage how it affects you. Read on to learn more.

Gazing down on the spectacular view from a mountaintop can take your breath away. That breathlessness is oftentimes more than just an awestruck reaction to the sights. It can be a symptom of altitude sickness, an illness that can strike hikers, mountain climbers, skiers and anyone who hits the 8,000-foot mark on a mountain.

Although millions of Americans have balanced disorders, they can be difficult to diagnose. That's because dizziness--a common symptom--is such a broad term.

Botulism is rare, but extremely dangerous. This quiz will help you learn how to make sure the food you eat is safe.

Find out how much you know about asthma basics with this quiz.

Aplastic anemia is a rare blood disorder that affects the growth of blood cells. "Aplastic" means "lack of growth."