Low Testosterone (LT) Information
Test & Diagnosis
While a blood test is one of the most common ways to measure testosterone levels, there are several less invasive methods currently available. For instance, some research shows that analyzing saliva is an accurate way to test for low testosterone levels.
Testosterone travels around your bloodstream in two forms — free testosterone or bound testosterone. Roughly two percent of total testosterone is made up of free testosterone, which is the most "active" form. The rest is attached to sex hormone-binding globulin (known as SHBG) and other proteins.
In aging men, it's possible for total testosterone to appear normal, while free testosterone is actually low. If you do get your testosterone levels measured, make sure to ask for a reading of both total and free testosterone.
While a blood or saliva test is a more accurate way of establishing your levels of testosterone, you can also use The Saint Louis University Androgen Deficiency in Aging Men (ADAM) Questionnaire. Dr. John Morley, a researcher with the Saint Louis University School of Medicine, developed the self-screening tool to help identify symptoms of low testosterone in men. Choose the responses below that best describe how you have been feeling.
1. Do you have a decrease in libido (sex drive)?
2. Do you have a lack of energy?
3. Do you have a decrease in strength and/or endurance?
4. Have you lost height?
5. Have you noticed a decreased "enjoyment of life"?
6. Are you sad and/or grumpy?
7. Are your erections less strong?
8. Have you noticed a deterioration in your ability to play sports?
9. Are you falling asleep after dinner?
10. Has there been a recent deterioration in your work performance?
If you answer yes to question one or seven, or at least three of the other questions you may have low testosterone levels.
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