> ## Documentation Index > Fetch the complete documentation index at: https://colipse.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Prostate Health > What the research says about coffee, prostate cancer risk, and BPH urinary symptoms, and whether decaf shares the protective effect. *A 2011 Harvard study of 47,911 men found that drinking 6 or more cups of coffee per day was associated with a 60% reduction in lethal prostate cancer risk, with decaffeinated coffee showing a similar inverse association.* ## Coffee and Prostate Cancer Risk A landmark study by Wilson KM et al., published in the *Journal of the National Cancer Institute* in 2011 (DOI 10.1093/jnci/djr151, PMC3110172), followed 47,911 U.S. men in the Health Professionals Follow-Up Study from 1986 to 2008. The researchers recorded 5,035 prostate cancer cases, of which 642 were lethal. Among men drinking 6 or more cups of coffee per day compared to non-drinkers, the results were: * Total prostate cancer: relative risk 0.82 (95% CI 0.68 to 0.98), an 18% reduction * Lethal prostate cancer: relative risk 0.40 (95% CI 0.22 to 0.75), a 60% reduction * Advanced prostate cancer: relative risk 0.47 (95% CI 0.28 to 0.78), a 53% reduction The protective association was strongest for the most aggressive disease subtypes, not for benign tumors. Decaffeinated coffee in this study showed a similar inverse association for lethal and advanced prostate cancer (RR 0.91 per cup per day, p = 0.05, borderline significant). The authors concluded that the association appears to be related to non-caffeine components of coffee. A 2014 meta-analysis by Lu et al., published in *Cancer Causes and Control* (DOI 10.1007/s10552-014-0364-8), pooled 12 case-control studies (7,909 cases) and 9 cohort studies (455,123 subjects) and found an overall odds ratio of 0.91 (95% CI 0.86 to 0.97) for highest versus lowest coffee consumption. Significant inverse associations were found for fatal and high-grade cancer specifically. ## Counter-Evidence Not all studies replicate the Harvard findings for overall prostate cancer. The NIH-AARP study by Bosire et al. (DOI 10.1007/s10552-013-0229-6) followed 288,391 men and found no statistically significant association between coffee and prostate cancer risk over 11 years. The EPIC cohort by Sen et al. (DOI 10.1002/ijc.31634) across 142,196 European men found a hazard ratio of 1.02 (0.94 to 1.09), effectively null, for both total prostate cancer and decaffeinated coffee. The evidence is clearest for lethal or metastatic prostate cancer, not total prostate cancer incidence. The Wilson 2011 Harvard study is the primary evidence base for the protective signal, and it is among the highest-powered analyses in this area. ## Non-Caffeine Compounds and Why Decaf Is Relevant A 2022 mechanistic review by Montenegro et al., published in *BioMed Research International* (PMC9054433), identified the likely protective compounds present in both caffeinated and decaffeinated coffee: * Chlorogenic acids: antioxidant and anti-inflammatory, present in decaf * Trigonelline: anti-proliferative activity in cell models, largely retained after decaffeination * Cafestol and kahweol (diterpenes): induce phase II detoxification enzymes, present in unfiltered coffee * Melanoidins: anti-inflammatory, formed during roasting, retained in decaf Decaf shows similar reductions in inflammatory markers (CRP, IL-6, TNFR-2) and similar induction of autophagy compared to caffeinated coffee in clinical studies reviewed by Montenegro et al. ## Caffeine and BPH Urinary Symptoms Benign prostatic hyperplasia (BPH) is enlargement of the prostate gland, common in men over 50. Caffeine does not cause BPH or prostate gland growth. However, caffeine worsens urinary symptoms in men who already have it through two mechanisms: its diuretic effect increases urine production rate, accelerating bladder fill and worsening frequency and nocturia; and caffeine sensitizes the bladder lining, increasing urgency. A longitudinal study by Maserejian et al., published in the *American Journal of Epidemiology* (DOI 10.1093/aje/kws411), followed 4,144 men and found that men drinking more than 2 cups of coffee per day had an odds ratio of 2.09 (95% CI 1.29 to 3.40) for progression of lower urinary tract symptoms, particularly storage and urgency symptoms. Decaf's 2 to 15 mg caffeine content is substantially lower than the 80 to 100 mg in regular coffee, reducing these urinary stimulant effects. No dedicated randomized controlled trial has compared decaf versus regular coffee specifically for BPH symptoms, but the caffeine-driven mechanisms are well understood. ## What Colipse Coffee offers for prostate health | Product | Why it fits | | - | - | | [Decaf Espresso Beans Swiss Water® Process](https://colipsecoffee.com/products/decaf-espresso-beans) | Espresso format concentrates chlorogenic acids, trigonelline, and diterpenes - the non-caffeine compounds associated with the lethal prostate cancer risk reduction in the Wilson 2011 Harvard study | | [Dark Roast Decaf Coffee Swiss Water® Process](https://colipsecoffee.com/products/dark-roast-decaf) | Removes caffeine-driven diuretic and bladder-stimulant effects that worsen BPH urinary symptoms, while retaining the polyphenol profile linked to the cancer risk data | ### How each product relates to prostate health **Decaf Espresso Beans** align with the mechanistic rationale for the Harvard study's protective signal. The Wilson 2011 *JNCI* data (47,911 men, 22 years) showed that decaffeinated coffee had a similar inverse association with lethal prostate cancer as caffeinated coffee (RR 0.91 per cup per day, p=0.05), pointing to non-caffeine compounds as the active agents. Espresso extraction concentrates chlorogenic acids, trigonelline, and cafestol and kahweol diterpenes per serving - the compounds the Montenegro 2022 *BioMed Research International* review identifies as the most plausible candidates for the anti-proliferative and anti-inflammatory effects observed in the data. **Dark Roast Decaf** addresses the BPH symptom management side. Caffeine worsens lower urinary tract symptoms by increasing urine production and sensitizing the bladder lining - the Maserejian 2013 *American Journal of Epidemiology* study found men drinking more than 2 cups of caffeinated coffee per day had OR 2.09 (95% CI 1.29 to 3.40) for LUTS progression. Dark Roast Decaf removes this mechanism while maintaining daily coffee ritual and the polyphenol intake that the epidemiological data associates with reduced aggressive prostate cancer risk. ## Frequently Asked Questions The strongest evidence comes from the Wilson 2011 Harvard study, which found that decaffeinated coffee showed a similar inverse association to caffeinated coffee for lethal and advanced prostate cancer (RR 0.91 per cup per day, p = 0.05). The protective signal appears to be driven by non-caffeine compounds including chlorogenic acids and trigonelline, both of which are present in decaf. However, two large cohort studies (NIH-AARP and EPIC) found null associations for overall prostate cancer. The evidence is most consistent for lethal or high-grade prostate cancer, not total incidence. Decaf substantially reduces the caffeine-driven urinary stimulant effects that worsen BPH symptoms. Caffeine increases urine production and sensitizes the bladder lining, worsening frequency and urgency. Decaf's 2 to 15 mg caffeine content versus the 80 to 100 mg in regular coffee reduces these effects proportionally. No dedicated trial has measured decaf specifically against BPH symptom outcomes, but the mechanism supporting benefit from switching is well-established. The Wilson 2011 Harvard study found the risk reduction was concentrated in lethal, metastatic, and high-grade prostate cancer rather than low-grade or localized disease. The proposed explanation is that the non-caffeine polyphenols in coffee (chlorogenic acids, trigonelline) may inhibit processes involved in cancer progression and metastasis, such as inflammation, angiogenesis, and cell proliferation, rather than initial tumor formation. This would produce a stronger effect on aggressive disease outcomes than on overall cancer incidence, consistent with the data. ## Related * [Cancer](/health-conditions/cancer) * [UTI](/health-conditions/uti) * [Diabetes](/health-conditions/diabetes) ## Disclaimer *This page is for educational purposes only and does not constitute medical advice. If you have been diagnosed with prostate cancer, BPH, or any urological condition, consult your urologist or oncologist before making dietary changes.*