Prostate Cancer Risk Factors: What Every Man Should Know

Prostate cancer is one of the most common cancers diagnosed in men worldwide. While many cases grow slowly and may never become life threatening, others are more aggressive and require prompt treatment. Understanding the factors that increase the risk of developing prostate cancer can help men make informed decisions about screening, lifestyle, and conversations with their healthcare providers.

Researchers continue to study the exact causes of prostate cancer, and no single factor has been identified as the sole cause. Instead, prostate cancer appears to develop through a combination of genetic, hormonal, environmental, and lifestyle influences that cause normal prostate cells to become abnormal over time.

Some risk factors cannot be changed, such as age and inherited genetics. Others, including body weight, physical activity, and diet, may be modified to support overall health and potentially reduce the risk of certain cancers.

This article explains the most important prostate cancer risk factors, what the research says, and what men can do to take a proactive approach to their prostate health.

What Is a Risk Factor?

A risk factor is anything that increases the likelihood of developing a disease. Having one or more risk factors does not mean a person will develop prostate cancer. Likewise, some men who develop prostate cancer have few or no known risk factors.

Understanding risk factors helps identify men who may benefit from earlier discussions about screening and prostate health.

1. Age: The Biggest Risk Factor

Age is the strongest known risk factor for prostate cancer.

The disease is uncommon in men younger than 40 but becomes increasingly common after age 50. Most prostate cancer diagnoses occur in men over the age of 65.

As men age, cells throughout the body, including those in the prostate, accumulate genetic changes. These changes can increase the likelihood that normal cells will begin growing uncontrollably.

Although younger men can develop prostate cancer, it is relatively rare compared to older adults.

2. Family History

A family history of prostate cancer significantly increases a man's risk.

Men may have a higher likelihood of developing prostate cancer if they have:

  • A father with prostate cancer

  • A brother with prostate cancer

  • Multiple close relatives diagnosed with prostate cancer

  • Relatives diagnosed at a younger age

Risk generally increases as more close family members are affected.

If prostate cancer runs in your family, discussing your personal risk with a healthcare provider may help determine whether earlier screening is appropriate.

3. Inherited Genetic Mutations

Some men inherit genetic mutations that increase their lifetime risk of prostate cancer.

Genes that have been linked to increased prostate cancer risk include:

  • BRCA1

  • BRCA2

  • HOXB13

  • DNA mismatch repair genes associated with Lynch syndrome

Among these, BRCA2 mutations are associated with a substantially higher risk of developing aggressive prostate cancer.

Genetic counseling and testing may be recommended for men with strong family histories of prostate, breast, ovarian, pancreatic, or colorectal cancers.

4. Race and Ethnicity

Research has consistently shown differences in prostate cancer risk among racial and ethnic groups.

In the United States:

  • Black men have a higher risk of developing prostate cancer.

  • Black men are more likely to develop prostate cancer at younger ages.

  • Black men are also more likely to be diagnosed with aggressive forms of the disease.

The reasons for these differences are complex and likely involve a combination of genetics, environmental factors, access to healthcare, social determinants of health, and differences in screening and treatment.

Men of all racial and ethnic backgrounds should discuss individualized screening recommendations with their healthcare providers.

5. Family History of Other Cancers

A family history of certain cancers may also increase prostate cancer risk.

These include:

  • Breast cancer

  • Ovarian cancer

  • Pancreatic cancer

  • Colorectal cancer associated with Lynch syndrome

These cancers sometimes share inherited genetic mutations that increase cancer susceptibility.

6. Diet and Nutrition

Researchers continue to study whether certain dietary patterns influence prostate cancer risk.

While no specific food has been proven to prevent prostate cancer, some evidence suggests that long-term dietary habits may play a role in overall prostate health.

A balanced eating pattern emphasizing whole foods may support general health and reduce the risk of chronic diseases.

A healthy diet typically includes:

  • Fruits

  • Vegetables

  • Whole grains

  • Beans and legumes

  • Fish

  • Healthy fats such as olive oil

  • Nuts and seeds

Some studies have explored the potential roles of lycopene, cruciferous vegetables, omega-3 fatty acids, and soy foods, but findings remain mixed.

7. Obesity

Obesity has been associated with an increased risk of developing more aggressive forms of prostate cancer.

Although obesity does not necessarily increase the overall chance of developing prostate cancer, research suggests that men with obesity may be more likely to develop advanced disease or experience poorer outcomes after diagnosis.

Maintaining a healthy weight supports cardiovascular health, metabolic function, and overall wellness.

8. Physical Activity

Regular physical activity offers numerous health benefits and may contribute to lower cancer risk overall.

Exercise helps:

  • Maintain healthy body weight

  • Improve insulin sensitivity

  • Reduce inflammation

  • Support immune function

Although research specifically linking exercise to reduced prostate cancer risk is ongoing, regular physical activity is recommended as part of a healthy lifestyle.

Adults should aim for at least 150 minutes of moderate-intensity exercise each week.

9. Smoking

Smoking is not considered a major cause of prostate cancer, but it has been associated with worse outcomes among men who develop the disease.

Research suggests smokers may have a higher risk of:

  • Aggressive prostate cancer

  • Cancer recurrence

  • Death from prostate cancer

Quitting smoking provides substantial health benefits regardless of age.

10. Environmental and Occupational Exposures

Researchers continue studying whether certain environmental exposures contribute to prostate cancer risk.

Areas of ongoing research include:

  • Certain industrial chemicals

  • Pesticides

  • Firefighting exposures

  • Military-related environmental exposures

For most men, evidence remains limited or inconclusive, and additional research is needed.

Factors That Do Not Appear to Cause Prostate Cancer

Many myths surround prostate cancer risk. Current evidence does not support several commonly held beliefs.

There is no strong evidence that prostate cancer is caused by:

  • Sexual activity

  • Frequency of ejaculation

  • Vasectomy

  • Benign prostatic hyperplasia (BPH)

  • Riding bicycles

While these topics have been studied, current research does not support a direct cause-and-effect relationship.

Can You Reduce Your Risk?

There is no guaranteed way to prevent prostate cancer. However, healthy lifestyle choices support overall health and may help reduce the risk of several chronic diseases.

Healthy habits include:

Maintain a Healthy Weight

Healthy body weight supports hormone balance and metabolic health.

Stay Physically Active

Regular exercise benefits the heart, immune system, and overall wellness.

Eat a Nutrient Rich Diet

Choose foods rich in fruits, vegetables, whole grains, lean proteins, and healthy fats.

Don't Smoke

Avoiding tobacco benefits nearly every organ in the body.

Discuss Screening With Your Healthcare Provider

Men at higher risk, including those with a family history or inherited genetic mutations, may benefit from earlier conversations about prostate cancer screening.

When Should Men Consider Screening?

There is no one-size-fits-all recommendation for prostate cancer screening.

Instead, many medical organizations recommend shared decision making, where men discuss the potential benefits and risks of screening with their healthcare provider.

Earlier discussions may be appropriate for men who:

  • Are age 50 or older with average risk.

  • Are Black men.

  • Have a first-degree relative diagnosed with prostate cancer.

  • Carry inherited genetic mutations associated with increased risk.

Screening may include a prostate-specific antigen (PSA) blood test and, in some cases, a digital rectal examination (DRE).

Frequently Asked Questions

What is the biggest risk factor for prostate cancer?

Age is the strongest known risk factor. Most prostate cancer cases occur in men over the age of 65.

Does having BPH increase prostate cancer risk?

No. Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the prostate and does not cause prostate cancer.

Can prostate cancer run in families?

Yes. A family history of prostate cancer, especially in close relatives, increases risk.

Does diet cause prostate cancer?

No single food causes prostate cancer. However, long-term dietary patterns may influence overall health and potentially affect cancer risk.

Can prostate cancer be prevented?

There is no guaranteed way to prevent prostate cancer. Maintaining a healthy lifestyle and discussing screening with a healthcare provider may help support long-term prostate health.

Take Charge of Your Prostate Health

While some prostate cancer risk factors, such as age, genetics, and family history, cannot be changed, understanding them can help you make informed decisions about your health.

Healthy habits like staying active, maintaining a healthy weight, eating a balanced diet, and avoiding tobacco support overall wellness and may contribute to better long-term health. Just as important, knowing your personal risk can help guide conversations about prostate cancer screening and early detection.

The earlier men understand their risk, the better prepared they are to take a proactive approach to protecting their prostate health.


Related Articles

Early Prostate Cancer Symptoms and Why There May Be None

References 

American Urological Association. (2023). Early detection of prostate cancer: AUA guideline. American Urological Association.

Carter, H. B., Albertsen, P. C., Barry, M. J., et al. (2013). Early detection of prostate cancer: American Urological Association guideline. The Journal of Urology, 190(2), 419–426.

National Cancer Institute. (2024). Prostate cancer prevention (PDQ®)–Health professional version. National Cancer Institute.

National Comprehensive Cancer Network. (2024). NCCN Clinical Practice Guidelines in Oncology: Prostate Cancer Early Detection.

Rawla, P. (2019). Epidemiology of prostate cancer. World Journal of Oncology, 10(2), 63–89.

Siegel, R. L., Giaquinto, A. N., & Jemal, A. (2024). Cancer statistics, 2024. CA: A Cancer Journal for Clinicians, 74(1), 12–49.

World Cancer Research Fund/American Institute for Cancer Research. (2018). Diet, nutrition, physical activity and prostate cancer. Continuous Update Project Expert Report.