What Level Should My Testosterone Be By Age?

Testosterone levels naturally change throughout your life, and “normal” depends heavily on your age. For adult men, the typical range is roughly 300 to 1,000 nanograms per deciliter (ng/dL), but levels peak in your 20s and gradually decline after age 30. By age 70, many men have levels in the 200 to 700 ng/dL range, though individual variation is significant.

What Level Should My Testosterone Be By Age?

There is no single “perfect” number that applies to every man. Testosterone is measured in nanograms per deciliter (ng/dL), and most laboratories define normal as roughly 300 to 1,000 ng/dL for adult men. However, that broad range hides important age-related patterns.

In your 20s, levels typically sit at the higher end, often between 500 and 900 ng/dL. After age 30, testosterone declines about 1% per year on average. By your 40s and 50s, levels commonly fall between 350 and 700 ng/dL. In your 60s and 70s, readings between 200 and 600 ng/dL are common.

Age is not the only factor. Time of day matters greatly. Testosterone peaks in the morning, so doctors usually draw blood before 10 a.m. A single low reading does not mean you have low testosterone. Guidelines recommend two separate morning measurements before making any diagnosis.

How Do Doctors Test Testosterone?

Doctors measure testosterone with a simple blood test. The most common test is total testosterone, which measures both bound and free testosterone in your blood. Some doctors also order free testosterone, which measures the small fraction not attached to proteins.

Most of your testosterone is bound to two proteins: sex hormone-binding globulin (SHBG) and albumin. Only about 2% to 3% is free. Free testosterone is what your tissues actually use, so some doctors consider it more meaningful than total testosterone.

Testing should happen in the morning, ideally before 10 a.m. Levels can drop by as much as 30% by the afternoon. If your first test comes back low, your doctor should repeat it on another day before discussing treatment.

What Are the Symptoms of Low Testosterone?

Low testosterone does not always cause symptoms. When it does, the most common signs include reduced sex drive, erectile dysfunction, fatigue, and loss of muscle mass. Some men also report depressed mood, irritability, and difficulty concentrating.

Low testosterone can also affect your body in ways you might not notice. It can reduce bone density, increase body fat, and lower your red blood cell count. These changes happen gradually, so many men attribute them to aging rather than hormone levels.

If you have symptoms, testing makes sense. If you feel fine, routine screening is not recommended for most men. The United States Preventive Services Task Force has not found enough evidence to support screening in men without symptoms.

What Causes Testosterone to Decline?

Aging itself is the main driver, but other factors can accelerate the decline. Obesity is strongly linked to lower testosterone. Fat tissue converts testosterone into estrogen, which further reduces circulating levels. Weight loss often improves testosterone naturally.

Chronic illness plays a major role too. Diabetes, kidney disease, liver disease, and HIV can all lower testosterone. So can certain medications, including opioids, steroids, and some antidepressants.

Lifestyle factors matter more than many men realize. Heavy alcohol use, poor sleep, and chronic stress all suppress testosterone. Sleep deprivation alone can reduce next-day testosterone levels by 10% to 15%. Improving sleep and reducing stress are among the most effective natural ways to support healthy levels.

When Is Testosterone Treatment Appropriate?

Testosterone replacement therapy (TRT) is not for everyone. Guidelines from major urology and endocrinology organizations recommend TRT only for men with confirmed low levels plus genuine symptoms. You should have two morning readings below roughly 300 ng/dL and symptoms that affect your quality of life.

TRT comes in several forms: injections, gels, patches, and pellets. Injections are typically given every one to two weeks. Gels and patches are applied daily. Pellets are implanted under the skin and last three to six months.

Treatment can improve libido, mood, energy, and bone density. However, it carries risks. TRT can worsen sleep apnea, increase red blood cell counts, and affect fertility. It may also accelerate prostate conditions, though current evidence does not clearly link TRT to prostate cancer.

TRT is not a weight-loss drug or a fountain of youth. Some men expect dramatic physical changes that the evidence does not support. If your levels are borderline and you have no symptoms, treatment is unlikely to help.

Can You Raise Testosterone Naturally?

Yes, in many cases. Lifestyle changes can meaningfully raise testosterone, especially if your levels are on the lower end of normal. The evidence is strongest for weight loss, resistance training, and better sleep.

Resistance training, particularly heavy compound lifts like squats and deadlifts, can acutely raise testosterone. The effect is temporary, but consistent training helps maintain healthier baseline levels. Aerobic exercise also helps, especially when it supports weight loss.

Sleep is arguably the most underrated factor. Studies show that sleeping fewer than five hours per night can lower testosterone by 10% to 15%. Most adults need seven to nine hours. Prioritizing sleep may be the single most effective natural intervention.

Diet plays a smaller but real role. Adequate protein, healthy fats, and zinc are important for hormone production. Severe calorie restriction lowers testosterone, so crash dieting works against you. Moderate fat intake, about 20% to 30% of calories, supports healthy hormone levels.

Some supplements claim to boost testosterone, but the evidence is weak. Vitamin D and zinc can help if you are deficient, but they will not raise levels in men who already have enough. Most “testosterone boosters” sold online have no solid clinical evidence behind them.

What About Testosterone in Women?

Women also produce testosterone, though in much smaller amounts. Normal total testosterone for adult women is roughly 15 to 70 ng/dL. Levels peak in the 20s and decline gradually with age.

Low testosterone in women is not a well-defined medical condition. Some research suggests it may contribute to low libido and fatigue, but no clear diagnostic threshold exists. Testosterone therapy for women is not approved by the FDA for most uses, and long-term safety data is limited.

If you are a woman concerned about testosterone, discuss it with your doctor. Some clinicians prescribe low-dose testosterone for specific cases, but this is considered off-label use. The evidence does not support routine testing or treatment in women.

What Should You Do If Your Levels Are Low?

Start by talking to your doctor. Do not self-diagnose based on a single online test or home kit. Many factors can temporarily lower testosterone, including illness, stress, and poor sleep. A proper evaluation requires clinical context, not just a number.

Ask for two morning blood tests if symptoms warrant it. Review your medications, sleep habits, alcohol intake, and weight with your doctor. Address modifiable factors first. Many men see significant improvement from lifestyle changes alone.

If your levels are genuinely low and symptoms persist, discuss treatment options with a specialist. An endocrinologist or urologist can help you weigh benefits and risks. Regular monitoring is essential during treatment to check red blood cell counts, prostate health, and hormone levels.