© 2026 Forbes Media LLC. All Rights Reserved.

© 2026 Forbes Media LLC. All Rights Reserved.

If your doctor thinks you might have lupus, they may ask you to take blood tests to check for antibodies in your blood. The most common antibody test is called the antinuclear antibody (ANA) test.

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

How well do you understand the world of words? Verbal ability includes the capacity to reason using language, and to use words appropriately and in context. This test measures some of these abilities.

Test what you know about multiple intelligences. One of the most appealing ideas in psychology is the theory, first put forth by Harvard psychologist Howard Gardner in 1983, that several distinct ...

Complement component 3, often called C3, is an essential protein of the immune system. This protein plays a vital role in the body’s innate immune system, providing the first line of defense against ...

If you have diabetes or prediabetes, regularly monitoring your A1C blood sugar level is important for managing your condition and maintaining optimum health. A1C monitoring can also be used to ...