Testosterone is one of the most important hormones in the male body, regulating essential functions such as energy, physical performance, muscle and bone mass, as well as libido and mood. It also influences red blood cell production and metabolic health, contributing to the regulation of insulin sensitivity. However, healthy testosterone levels vary naturally with age over time.
As men age, it is normal for testosterone levels to decline. This decline can lead to symptoms such as fatigue, loss of strength, increased body fat and problems with sex drive. That’s why knowing optimal testosterone levels according to age and understanding how to keep them within a healthy range is critical to wellness and longevity.
In this article, we will explore normal testosterone ranges, how they vary with age, and what strategies you can apply to maintain balanced levels naturally.
What is a healthy testosterone level?
Testosterone is a key steroid hormone in the male body, responsible for key functions such as muscle development, red blood cell production, regulation of metabolism and maintenance of libido. Having healthy testosterone levels according to age is essential for overall well-being and quality of life.
But what is considered an optimal level? A healthy testosterone level varies according to each person’s age, lifestyle and genetics. However, generally accepted values are between 300 and 1,000 ng/dL (nanograms per deciliter) in adult men.

Factors that influence testosterone levels

Several factors can affect testosterone production, including:
- Age: Testosterone production peaks in adolescence and early adulthood, gradually declining after age 30.
- Lifestyle: Physical activity, diet and sleep habits play a key role in hormone levels.
- Chronic stress: In addition to raising cortisol levels, stress can suppress the hypothalamic-pituitary-gonadal axis, reducing testosterone production.
- Genetic factors: Some people have a genetic predisposition to maintain higher or lower testosterone levels.
- Obesity and insulin resistance: Studies have shown that excess body fat, especially in the abdominal area, decreases testosterone production and increases estrogen levels.
To counteract these factors, it is key to adopt habits that promote healthy testosterone levels according to age, such as a balanced diet and regular exercise, adjusting to the changing needs of each stage of life.
Normal ranges of testosterone according to age
As mentioned, generally accepted values range from 300 to 1,000 nanograms per deciliter (ng/dL) in adult men, although recent studies have shown that the average in men over 65 years of age is usually below 275 ng/dL, which is associated with symptoms of testosterone deficiency.
Maintaining healthy testosterone levels according to age is key to avoiding problems with energy, libido and physical performance.
- In the 20s and 30s, levels can range from 400 to 1,000 ng/dL, this being the peak of production.
- From the age of 30-40, testosterone begins to decline slightly, with values between 350 and 900 ng/dL.
- Between 40 and 50 years of age, levels may drop to 300-850 ng/dL.
- At 50-60 years of age, levels hover around 250-750 ng/dL.
- Finally, in the 60s and older, values may drop to 200-650 ng/dL.

Why do testosterone levels decrease with age?

As men age, it is normal for healthy testosterone levels according to age to progressively decline. However, this reduction is not only due to the passage of time, but also to several factors that can accelerate the process.
The natural process of aging
After the age of 30, levels begin to decrease by approximately 1% to 2% per year. This decline is part of the natural aging process and can lead to symptoms such as:
- Decreased energy and vitality.
- Loss of muscle mass and increase in body fat.
- Reduced sexual desire and erection problems.
- Changes in mood, such as irritability or depression.
Factors that can accelerate testosterone depletion
Although the decline of testosterone with age is a natural process, there are factors that can make this drop more pronounced:
Sedentary lifestyle
Poor diet
Chronic stress
Lack of sleep
Obesity and insulin resistance
Alcohol and tobacco use
Therefore, periodically monitoring healthy testosterone levels according to age allows us to detect early imbalances and adjust habits to counteract these factors.
Age-related symptoms of low testosterone levels
Having healthy testosterone levels according to age is essential for physical and mental well-being. However, when levels begin to decline, symptoms that affect quality of life can appear. Here are the most common symptoms of low testosterone at each stage of life.
20-30 years: First warning signs
At this stage, testosterone levels should be at their highest. However, certain factors can cause them to drop prematurely, causing:
- Lack of energy and chronic fatigue.
- Difficulty gaining muscle mass despite training.
- Reduced libido or occasional erection problems.
- Poor concentration and feeling of “mental fog”.
30-40 years: Changes in body composition
After the age of 30, testosterone production begins to decline by 1-2% per year. This can manifest itself in:
- Increased abdominal fat and difficulty losing weight.
- Decreased muscle strength and endurance.
- Decreased sexual desire and performance in intimacy.
- Changes in mood, increased irritability or episodes of anxiety.
40-50 years: More evident symptoms
At this stage, testosterone reduction is more noticeable and can affect daily life:
- Significant loss of muscle mass.
- Persistent fatigue and lack of motivation.
- Sleep problems, insomnia or frequent nocturnal awakenings.
- Decreased bone density and increased risk of injury.
- Drastic reduction of libido and more frequent erectile dysfunction.
50+ years: Impact on overall health.
By age 50 or older, testosterone levels may have decreased by as much as 30% or more compared to youth. This can lead to:
- Memory loss and difficulty concentrating.
- Increased risk of osteoporosis and bone weakness.
- Decreased vitality and a feeling of accelerated aging.
- Cardiovascular problems and increased cholesterol.
- Depression or feeling of apathy.
If you experience any of these symptoms, it is advisable to have a blood test to measure total and free testosterone levels. Identifying a deficiency early can help you take steps to restore proper hormone balance.
How to improve testosterone levels naturally
While testosterone decline with age is a natural process, there are many ways to maintain healthy testosterone levels according to age without the need for medical treatments. Here are effective strategies to optimize your testosterone production naturally.
- Strength training and high intensity exercise
- Eating a diet rich in essential nutrients
- Getting enough sleep and improving sleep quality
- Reducing stress and controlling cortisol
- Maintaining a healthy weight and avoiding excess body fat
Symptoms of overly high testosterone levels
Maintaining healthy testosterone levels according to age is key to well-being and performance. However, as we have already explained throughout the text, low levels have various symptoms that affect men’s quality of life. However, high levels can also generate health problems.
Symptoms of high testosterone levels
Although many people associate high testosterone with increased energy and strength, too much of this hormone can also cause problems such as:
- Increased aggressiveness and irritability.
- Acne and oily skin, due to overproduction of sebum.
- Increased risk of blood clots and cardiovascular problems.
- Abnormal body hair growth or hair loss.
Hormonal imbalance, affecting the production of other key hormones.
Optimize your testosterone levels for a fulfilling life
Maintaining healthy testosterone levels according to age is essential for well-being, performance and quality of life. As we have seen, testosterone influences key aspects such as energy, muscle mass, libido and mental health.
Over time, it is normal for levels of this hormone to decline, but with proper habits, it is possible to maintain healthy levels of testosterone according to age. Ensuring a good diet, strength training, reducing stress and getting plenty of sleep are some of the most effective strategies for maintaining healthy hormone production.
However, if you are experiencing symptoms of low testosterone or feel you could benefit from a more personalized approach, at Medical Health Institute we offer science-backed solutions to optimize your hormone health.
Book a personalized consultation with our experts and discover how to maximize your wellness with advanced treatments.