What Causes an Enlarged Prostate in Men

Understanding Benign Prostatic Hyperplasia (BPH)

An enlarged prostate, medically known as benign prostatic hyperplasia (BPH), is one of the most common conditions affecting men as they age. The word “benign” is important here — BPH is not cancer and does not increase the risk of prostate cancer. However, it can significantly affect urinary function and quality of life. Understanding what drives prostate growth may help men make informed decisions about their health.

How the Prostate Changes With Age

The prostate is a walnut-sized gland located just below the bladder. Its primary role is to produce fluid that nourishes and transports sperm. Throughout a man’s life, the prostate goes through two main growth phases: the first occurs during puberty, and the second begins around age 25 and continues slowly for the rest of a man’s life.

For many men, this gradual growth eventually causes the prostate to press against the urethra, restricting urine flow. Research suggests that by age 60, roughly half of all men show signs of BPH, and that number rises to about 90 percent by age 85.

Hormonal Changes as a Primary Driver

Hormones appear to play a central role in prostate enlargement. As men age, their testosterone levels gradually decline while levels of estrogen remain relatively stable. Some researchers believe this hormonal shift may create conditions that encourage prostate cell growth.

Another hormone, dihydrotestosterone (DHT), is also strongly associated with BPH. DHT is a byproduct of testosterone and is produced with the help of an enzyme called 5-alpha reductase. Research suggests that DHT accumulates in the prostate with age and may stimulate the continued growth of prostate cells, even when blood testosterone levels are low.

Genetic and Family History Factors

Genetics appear to contribute meaningfully to BPH risk. Men who have a father or brother with an enlarged prostate may be more likely to develop the condition themselves. Studies suggest that men with a strong family history of BPH tend to develop symptoms at a younger age and may experience a more rapid progression. While nothing can change your genetic makeup, knowing your family history allows for earlier monitoring and more proactive conversations with a healthcare provider.

Lifestyle and Metabolic Contributors

Emerging research suggests that certain lifestyle factors may influence prostate growth over time. Obesity, type 2 diabetes, and metabolic syndrome — a cluster of conditions including high blood pressure, elevated blood sugar, and excess abdominal fat — have all been associated with a higher likelihood of developing BPH.

Physical inactivity may also be a contributing factor. Studies have found associations between sedentary behavior and increased BPH risk, while regular physical activity has been linked to a lower likelihood of developing bothersome urinary symptoms.

Foods That May Support Prostate Health

While no single food can prevent or treat BPH, research suggests that certain dietary patterns may support overall prostate health. A diet rich in the following foods may be beneficial:

• Tomatoes and tomato-based products — contain lycopene, an antioxidant that has been studied in relation to prostate health
• Cruciferous vegetables (broccoli, cauliflower, Brussels sprouts) — rich in compounds that may support healthy cell function
• Fatty fish (salmon, sardines, mackerel) — provide omega-3 fatty acids, which research suggests may have anti-inflammatory properties
• Pumpkin seeds — contain zinc and phytosterols that some studies associate with urinary tract support
• Green tea — contains catechins that have been explored in prostate health research
• Berries and leafy greens — provide antioxidants that may help reduce oxidative stress throughout the body

Habits and Patterns That May Worsen Symptoms

Certain everyday habits may aggravate existing BPH symptoms or contribute to faster prostate growth over time. Being mindful of the following may help men manage their urinary health more effectively:

• Excessive alcohol consumption — alcohol is a diuretic and may irritate the bladder and worsen urinary frequency
• High intake of red meat and saturated fat — some research associates high-fat diets with increased BPH risk
• Caffeine — may act as a bladder irritant in men who already have urinary symptoms
• Prolonged sitting — may increase pressure on the pelvic region and is associated with poorer prostate outcomes in observational studies
• Dehydration or restricting fluids — while it may seem logical to drink less to urinate less, concentrated urine can irritate the bladder and worsen symptoms
• Ignoring urinary symptoms — delayed evaluation can allow associated complications, such as urinary tract infections or bladder issues, to develop

When to Speak With a Healthcare Provider

Not every man with an enlarged prostate experiences symptoms, and not every man with symptoms requires immediate medical treatment. However, certain signs warrant prompt evaluation by a doctor. These include a weak or interrupted urine stream, difficulty starting urination, the sensation of an incompletely emptied bladder, frequent nighttime urination, or any pain during urination.

A healthcare provider can evaluate symptoms using questionnaires, physical examination, and blood tests, including a prostate-specific antigen (PSA) test, to rule out other conditions and guide appropriate next steps.

The Bottom Line

An enlarged prostate is a natural part of aging for many men, driven largely by hormonal shifts and genetic predisposition. While these factors cannot be fully controlled, research suggests that maintaining a healthy weight, staying physically active, eating a balanced diet, and avoiding known bladder irritants may support better urinary health over time. Open, regular communication with a healthcare provider remains the most reliable way to monitor and manage prostate health as men age.

Consistency beats any single food or product. If you’re also considering a supplement to complement these habits, here’s our independent take: ProstaVive Review 2026: Honest Verdict From an Expert.