Learn how the body’s largest internal organ works to keep you healthy.

Your kidneys may be small, but their function can reveal a lot about your health.

Inflammation is one of your body’s most powerful tools for fighting injury and infection.

The fertility journey can be difficult—but the first step doesn’t have to be.

Find out how you react to the most common seasonal and year-round allergens.

Concerned about your heart health? Measure what matters.

No question this vitamin is crucial to your health, but are you getting enough of it?

Interested in testing your hormones? Consider starting with your thyroid.

When it comes to a man’s sexual health and vitality, there isn’t a measure that matters more.

Are you expecting? Know for sure.

There are eight different blood types—discover yours.

Did you know that some of the most common sexually transmitted infections are also the most treatable?

Measles, Mumps, and Rubella—Discover if you're protected from all three.