Just because a medicine is available without a prescription doesn't mean it's safe to take. Take this quiz and learn the ins and outs of OTC medicines.

Organic ingredients are grown and processed without artificial additives and used in a wide variety of products. Find out more about organic foods by taking this quiz.

Nicotine, one of the main chemicals in tobacco, is the primary reason that smoking is so addictive. Even though most smokers know that smoking is bad for them, they find it difficult to quit because of the nicotine's effect.

Answer this one: Although mammograms can identify tumors at a very early stage, the tumors may have been growing for how long by the time they show up on the X-ray?

True or false: The most serious effects of lead exposure in children are vomiting and weight loss? Learn the answer by taking the Lead Safety Quiz.

Learning how to prevent knee injuries and treating them if they occur can help you stay active at work and play.

Kidney stones are one of the most common problems of the urinary tract—and one of the most painful disorders, period. How much do you know about kidney stones? Try your hand at the following quiz.

Arthritis is usually thought of as a disease that occurs later in life, but one child in every thousand develops a juvenile form of this illness. Take this quiz to learn more.

A surprisingly large number of American teenagers experiment with intoxicating inhalants, resulting in an untold number of deaths. Find out more about inhalant abuse by taking this quiz.

True or false: When I use herbs and spices, I don’t need to worry about following strict rules about combining certain herbs and spices with certain foods.