What Causes Low Testosterone and How to Treat Low T Symptoms

It's the diagnosis no man wants to hear, but plenty receive each year: low T. Low testosterone has become widespread across the U.S., with an estimated 4-5 million American men experiencing symptoms each year. So, what causes low testosterone and is there a way to effectively treat it?

While low testosterone primarily affects older men over the age of 30 (19-39% to be exact), younger men as early as 25 may begin to fall victim to the onset of low T symptoms like erectile dysfunction and fatigue. Oftentimes, these symptoms can be embarrassing and may even lead to a lack of libido in the bedroom.

Here's the good news: in this article, we are going to tell you everything you need to know about low testosterone and how our ageRejuvenation clinic can help you overcome your low T symptoms. Let's get started.

What Causes Low Testosterone in Men?

Low testosterone happens when the testicles, or the brain signals that control them, fail to make enough of the hormone, a condition doctors call hypogonadism. The most common causes are natural aging, excess body fat, certain medications, and underlying health conditions.

Testosterone (T) is a key male sex hormone that is produced by the testicles and is incredibly important for proper sexual development in males. Testosterone begins production during puberty and allows boys to develop masculine features, such as:

• Deeper voices

• Facial hair

• Body hair

• Muscular development

Most importantly, testosterone is needed for the production of sperm and can greatly affect fertility. Because a signaling loop between the brain and the testicles controls the hormone, a problem at either point can lower your levels. The Cleveland Clinic explains that low testosterone, or male hypogonadism, can start in the testicles or in the pituitary gland and hypothalamus that signal them.

Does Testosterone Drop as You Get Older?

Yes. Testosterone levels naturally peak in early adulthood and then slowly decline with age. For most men this decline starts around age 30, and it is a normal part of getting older rather than a disease on its own.

T levels vary greatly from person to person, but most men have one thing in common: T levels will begin to decrease with aging. In fact, by the age of 30, many men will start to see the signs of a drop off in testosterone production. National health resources note that testosterone may begin to slowly decrease beginning around age 30 to 40 as a natural part of aging.

While this is common and completely natural, some people experience a larger decrease in this hormone than others. When men have lower testosterone than what is considered normal for their age group, they are diagnosed with Testosterone Deficiency Syndrome (TD). If that age-related dip is dragging down your energy, mood, or sex drive, our physician-guided testosterone replacement therapy program is designed to bring levels back into a healthy range.

So what does low T mean for those who have it?

What Are the Most Common Low T Symptoms?

The most common low T symptoms are erectile dysfunction, low sex drive, fatigue, and loss of muscle mass. Many men also notice mood changes, trouble concentrating, and increased body fat. These signs often build slowly, so they are easy to overlook.

First and foremost, all men should be aware of the most common low testosterone symptoms. Physical symptoms men typically experience include:

• Erectile dysfunction

• Low libido

• Hair Loss

• Osteoporosis

• Gynecomastia

• Low energy

• Decreased muscle mass

• Infertility

If persistent trouble getting or keeping an erection is a main concern, know that low testosterone is one of several treatable drivers behind that symptom. While these signs are more evident of testosterone deficiency, sometimes symptoms are not as clear. This leads us to our next point.

Mental Wellbeing and Signs of Low Testosterone

Low motivation at work, memory loss, and poor focus can also be attributed to low testosterone. Furthermore, low T greatly affects your state of mind and can bring about many health obstacles like:

• Mood swings

• Anxiety

• Stress

• Depression

These symptoms are often referred to as andropause and can be equivalent to menopause symptoms experienced in women.

How Does Low Testosterone Affect Mental Health?

Low testosterone can lower mood, drive, and confidence because the brain has testosterone receptors that influence how you think and feel. Men with low T are more likely to feel down, unmotivated, and stuck in a cycle of low energy, weight gain, and reduced self-esteem.

Low T is nothing short of a blow to the ego for many men, and can leave those battling it feeling insecure with the lack of ability to perform in both the bedroom and in life. Here's why.

Your cells contain testosterone receptors which can greatly impact your brain functions. Michael A. Werner, MD, a board-certified urologist from New York explains, " Low levels of testosterone can cause a cycle of a man having low energy, thus not exercising , then gaining weight and feeling less attractive."

One study was conducted with more than 600 Dutch men and indicated a significant association between depression and low testosterone. The study concluded that men with low T were more likely to battle symptoms of depression.

When Does Testosterone In Men Decrease?

The traditional answer to this question coincides with the aging process. Nowadays, it isn't as straight-forward, as now even males in their early twenties are starting to reap the ill-effects of low testosterone.

According to the Cleveland Clinic, a man's testosterone levels will begin to decline year-over-year by about 1% starting at age 30. However, there are many other answers to what causes low testosterone in men.

Can Lifestyle Habits Lower Your Testosterone?

Yes. Poor sleep, heavy alcohol use, an unhealthy diet, chronic stress, and lack of exercise can all suppress testosterone production. In younger men especially, these lifestyle factors are a frequent and often reversible cause of low T.

Due to poor lifestyle choices, young men are beginning to experience the onset of low T as early as 21. This is not considered a natural decline of testosterone, since external factors and health conditions can be at blame.

Low T in young men can be linked to lifestyle habits such as:

• Drugs and alcohol

• Poor sleep habits

• Poor diet

• Stress

• Lack of exercise

If low testosterone is due to any of these factors, it is usually very simple to treat with basic lifestyle changes. If those changes are not enough, the experienced clinicians in our men's health and hormone optimization practice can dig deeper to find what is holding your levels back.

What Medical Conditions Cause Low Testosterone?

Several medical conditions can lower testosterone, including obesity, type 2 diabetes, thyroid problems, and chronic kidney disease. Certain medications, infections, injuries, and tumors that affect the testicles or pituitary gland can also reduce hormone production.

Finally, low T can be greatly affected by underlying medical issues, such as:

• Cancer

• Obesity

• Diabetes

• Changes in thyroid function

• Kidney damage

• Traumatic brain injuries

These connections are well documented. The Mayo Clinic lists obesity, HIV/AIDS, prior chemotherapy or radiation, and obstructive sleep apnea among the risk factors for male hypogonadism. In younger patients, a review published through the National Institutes of Health points to acquired causes such as obesity, diabetes, and anabolic steroid use. Low testosterone can come on at various ages for many reasons, but if you are in your early twenties or thirties, do not ignore the symptoms.

What Is the Best Treatment For Low T?

The most established treatment for clinically low testosterone is testosterone replacement therapy, usually given as injections or long-lasting pellets. The right approach depends on your bloodwork and overall health, so treatment should start with proper lab testing and a doctor's evaluation.

If low T is affecting your everyday life, it may be time to find a low T treatment center like ageRejuvenation.

While there are always new pills and injections launching into the marketplace to solve the mysteries of low libido, the simplest tried and true method of treating low testosterone is with a structured testosterone replacement therapy (TRT) plan. This treatment can help you overcome negative low T symptoms such as low libido, fatigue, mood swings, and even erectile dysfunction. Major medical centers, including Mayo Clinic, describe testosterone replacement therapy as a standard treatment for confirmed low testosterone.

Testosterone is either administered via injections or inserted in pellet form and lasts about 6 months. The method you choose to use will be based on the consultation you have with your doctor regarding lab results and what is best suited for you and your wellness.

Get the Low T Treatment You Need With ageRejuvenation

At ageRejuvenation, we believe that aging is a natural part of life. However, you don't have to live with the negative symptoms that can come along with it.

With our extensive expertise in integrative medicine, we perform a comprehensive lab panel, different from a primary or urologist, to better understand your hormone levels and any potential imbalances.

Our team of medical professionals are here to create a customized low T treatment plan made just for you.

Frequently Asked Questions

What is the most common cause of low testosterone?

The most common cause is natural aging. After about age 30, most men see testosterone slowly decline by roughly 1% per year. Beyond aging, obesity, type 2 diabetes, poor sleep, heavy alcohol use, and certain medications are frequent contributors that can lower hormone levels at any age.

What is a dangerously low testosterone level?

Most labs consider a total testosterone level below 300 nanograms per deciliter to be low, and doctors often confirm it with a second morning blood test. Whether a number is concerning depends on your symptoms and overall health, so a level that needs treatment for one man may not for another. Only a physician can interpret your results.

Can low testosterone cause erectile dysfunction?

Yes. Low testosterone is one of several recognized causes of erectile dysfunction and reduced sex drive. That said, erections also depend on blood flow, nerve function, and mental health, so low T is not always the only factor. A proper evaluation can identify whether hormones, circulation, or other issues are driving the problem.

What causes low testosterone in men in their 20s and 30s?

In younger men, low testosterone is often tied to lifestyle and medical factors rather than aging. Common causes include obesity, poor sleep, chronic stress, heavy alcohol or drug use, anabolic steroid use, and conditions like diabetes. Because many of these are reversible, early testing and treatment can make a real difference.

Is testosterone replacement therapy the only way to treat low T?

No. When low testosterone is driven by lifestyle, improvements in sleep, diet, exercise, and weight can sometimes restore healthy levels. When those steps are not enough or the cause is medical, testosterone replacement therapy through injections or pellets is the most established option. The right path depends on your lab results and a doctor's evaluation.