Last updated: May 18, 2026
Several patients that I have met at my office, they are more likely loved to discuss about the dietary against the prostate cancer. Well, I just make an 2020 updated in order to response something that you have wonder in mind.
Diets which have confirmed on protective effects against prostate cancer.
- Tomato – A tremendous study recently has shown that; Lycopene which is rich in tomato significantly capable to reduce the cancer risk rate. Furthermore, the effective dose-related is 2 mg that will help to increase Lycopene if can consume it regularly. Literally, it could decrease 1% of prostate cancer rate down there. But why Lycopene so works? – There is a theory explained that Lycopene doing the reduction of the genes expression involved with testosterone metabolism. Absolutely, testosterone hormone plays a major role in cancer’s natural history.
- Green tea – There’s been a confirmation studies said that Catechin which is rich in green tea has an inhibitory effects on the cancer progression. A tremendous study from Japanese who were number one in green tea drinker primarily said that, drinking 5 or more cups of green tea for your daily routine, will actually can be reduced the cancer risk rate either way.
Diets which probably have protective effects against prostate cancer.
- Fish, vegetable oil – The unsaturated fatty acid might help reducing the cancer rate. Although, we have only a confirmed data that the High-Fat Diet can leads to several kind of cancers which prostate cancer is one among those. The studies in mice has shown that High-Fat diets are significantly increasing the cancer size.
- Legumes (Soy milk) – Isoflavones which is abundant in Legumes and it plays very protective effects role on the cancer prevention. Isoflavones chemical structural is similar to Estrogen hormone, therefore, it can bind with estrogen receptor in prostatic tissue and might inhibit cancer cell growth.
Diet which still controversial on a protective effect against prostate cancer.
- Prudent pattern diets – Prudent pattern diets is roughly defined as rich in vegetable, fruits, fishes and legume diet. The only data that we have now, a high red meat consumption, lots of processed meat intake, potatoes and high-fat dairy products are significantly increasing a prostate cancer risk.
Any questions, you can feel free to discuss with me. Good luck and stay safe from prostate cancer!
For prostate cancer screening, PSA evaluation, or personalized dietary and lifestyle advice, Dr. Soarawee Weerasopone offers specialist consultations at Bangkok Hospital Headquarters. Book a Consultation.
Frequently Asked Questions about Diet and Prostate Cancer
Yes, certain dietary choices have been shown to influence prostate cancer risk. Tomatoes (rich in lycopene) and green tea (rich in catechin) have the strongest evidence supporting a protective effect against prostate cancer. Other foods such as fish, vegetable oils, and legumes show promising but less conclusive results.
Tomatoes are rich in lycopene, an antioxidant that has been shown to reduce prostate cancer risk. Studies suggest that lycopene works by reducing the expression of genes involved in testosterone metabolism, which plays a key role in prostate cancer development. Regular consumption of lycopene at around 2 mg per day may help lower cancer risk over time.
Green tea contains catechins, a group of antioxidants with proven inhibitory effects on cancer cell progression. Studies from Japan, where green tea consumption is among the highest in the world, suggest that drinking five or more cups daily is associated with a measurable reduction in prostate cancer risk.
Yes. High-fat diets, particularly those rich in red meat, processed meat, and high-fat dairy products, are associated with an increased risk of prostate cancer. Animal studies have shown that high-fat diets significantly promote cancer growth, and this pattern is consistent with findings in human population studies.
The current evidence supports obtaining these nutrients from natural food sources rather than supplements, as the full protective mechanism may depend on other compounds present in whole foods. Before starting any supplement, it is advisable to consult your urologist, who can provide personalized guidance based on your individual risk profile.
Disclaimer: This content is written and reviewed by Dr. Soarawee Weerasopone, a board-certified urologist at Bangkok Hospital Headquarters. It is intended for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any medical treatment.
Medically written & reviewed by: Dr. Soarawee Weerasopone (Dr. Pom) — Board-Certified Urologist, Bangkok Hospital Headquarters. International Fellow: Baylor College of Medicine (USA) · Juntendo University (Japan) · Chang Gung Memorial Hospital (Taiwan).
Dr. Soarawee Weerasopone (Dr. Pom) is a board-certified urologist at Bangkok Hospital Headquarters, specializing in Men’s Health, Robotic Surgery (Da Vinci System), and Kidney Stone treatment. He has completed international fellowships at Baylor College of Medicine (USA), Juntendo University Hospital (Japan), and Chang Gung Memorial Hospital (Taiwan). All medical content on this site is written and reviewed by Dr. Soarawee based on his clinical experience and international training.
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Dear Dr. Pommy, I really enjoyed reading your article. I am trying to get on a regimen of fresh fruits and green vegetables. The hardest thing I find is the carb cravings for bread, crackers, and chocolate every now-and-again. Have a safe trip to Thailand. Looking forward to seeing you in January!