"After age 30, most men begin to experience a gradual decline in testosterone," states David Samadi, MD, chairman of the urology department at Lenox Hill Hospital in nyc.
Though testosterone levels never reach zero (as estrogen levels do in women during menopause), low testosterone levels men to experience symptoms such as fatigue, low libido, and loss of muscle mass.
While reduced testosterone is more common in older men, it can occur in younger guys as well. Luckily, every one the causes of low testosterone in young guys are curable, so if you experience these symptoms at any age, there is no reason to ignore it.
Causes of Low Testosterone in Younger Men
For younger guys, a fall in testosterone levels can be caused by some ailments, such as type 2 diabetes, diabetes, chronic liver or liver disease, COPD or other lung disorder, or adrenal gland problems, according to Dr. Samadi.
Genetic causes of low testosterone in men include the ailments Klinefelter syndrome, Kallmann syndrome, Prader-Willi syndrome, and Myotonic dystrophy. Another disease which could result in low testosterone is hemochromatosis, making the body shop too much iron.
"Low testosterone can also result when something happens, like trauma or steroid use, that prevents the testes from making the hormone," says Bruce Gilbert, MD, PhD, an adjunct clinical professor of urology and reproductive medicine at Weill Cornell Medical College and director of reproductive and reproductive medicine at the Smith Institute for Urology of their North Shore-LIJ Health System.
Additional causes of low testosterone in men younger than 50 include pituitary gland tumors, HIV infection, and radiation therapy or chemotherapy for cancer.
Doctors categorize causes of low testosterone as primary or secondary.
"Primary hypogonadism stems from a problem in the testicles," Samadi states. "This could be from a developmental issue, injury to the testicles, or radiation or chemotherapy treatment.
Is It Low Testosterone?
Irrespective of the cause, low testosterone symptoms would be the same.
"Symptoms include low libido, erectile dysfunction, fatigue, decreased mental acuity and moodiness," Dr. Gilbert states.
"Younger men with low testosterone usually come to me and say, 'I can't work out like I used to, and I've lost interest in sex.’ â€
If you suspect low testosterone, the first step is to see your primary care physician. Your doctor can diagnose low testosterone with a blood test.
If your blood test reveals low testosterone (usually defined as a level lower than 300 ng/dL), the doctor may treat you or refer you to a specialist, such as a urologist or endocrinologist.
Not everyone with low testosterone needs treatment. "When it comes to treating low testosterone in younger men, we generally reserve treatment for people who have symptoms, such as fatigue and low libido," Gilbert says.
Such testosterone supplements come in the form of a gel, injections, patches, long-acting pellets, or oral inserts.
In these circumstances,"therapies are usually used only in the short term, and when a physician has close observation and knowledge of the individual," Gilbert says.
An important consideration for younger men before getting treatment is fertility. "You do not want to give supplemental testosterone to guys who want to be fertile because it can turn off sperm production," Gilbert says.
Once a young man goes off testosterone supplementation, there's a chance his sperm count will never return to what it was before he started. "Hence, men of reproductive age should consider alternatives that might increase their testosterone in addition to maintain their semen production," he states. One such choice is a class of drugs called selective estrogen receptor modulators (SERMs).
Other treatments for low testosterone include weight loss and other lifestyle modifications, like eating healthy and raising exercise.
The main point, though, is that if you've got low testosterone symptoms, it's very important to see your doctor. Then, your doctor can rule out potentially more serious causes of your symptoms, such as high blood pressure or a thyroid problem, and offer treatment that could enhance your energy and high quality of life.