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What Is Testosterone?

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Simple Answer

Testosterone is a hormone. Hormones are your body's chemical messengers, and they travel in the bloodstream to tissues or organs. In men, hormones are made in the testes. Testosterone can be linked with sexual function, reproduction, and other body processes.

What It Means

Hormones work slowly over time, but they can cause big changes in the body. Even a small amount can matter a lot. That is why too much or too little of a hormone can be serious.

When to Contact a Doctor

Talk to your health care provider if you have symptoms of a hormone disorder or concerns about low testosterone. They can decide if testing is needed.

Hormone levels can be checked in blood, urine, or saliva. Lab results can vary by the lab, age, sex, and method used.

Sources

This information is based on these free U.S. government medical sources:

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This service provides general medical information and education. It does not diagnose medical conditions or replace care from a physician or other qualified healthcare professional. If you may be experiencing a medical emergency, call 911.