Lycopene and Risk of Prostate Cancer: A Systematic Review and Meta-Analysis
Open accessAbstract
Prostate cancer (PCa) is a common illness for aging males. Lycopene has been identified as an antioxidant agent with potential anticancer properties. Studies investigating the relation between lycopene and PCa risk have produced inconsistent results. This study aims to determine dietary lycopene consumption/circulating concentration and any potential dose-response associations with the risk of PCa. Eligible studies published in English up to April 10, 2014, were searched and identified from Pubmed, Sciencedirect Online, Wiley online library databases and hand searching. The STATA (version 12.0) was applied to process the dose-response meta-analysis. Random effects models were used to calculate pooled relative risks (RRs) and 95% confidence intervals (CIs) and to incorporate variation between studies. The linear and nonlinear dose-response relations were evaluated with data from categories of lycopene consumption/circulating concentrations. Twenty-six studies were included with 17,517 cases of PCa reported from 563,299 participants. Although inverse association between lycopene consumption and PCa risk was not found in all studies, there was a trend that with higher lycopene intake, there was reduced incidence of PCa (P = 0.078). Removal of one Chinese study in sensitivity analysis, or recalculation using data from only high-quality studies for subgroup analysis, indicated that higher lycopene consumption significantly lowered PCa risk. Furthermore, our dose-response meta-analysis demonstrated that higher lycopene consumption was linearly associated with a reduced risk of PCa with a threshold between 9 and 21 mg/day. Consistently, higher circulating lycopene levels significantly reduced the risk of PCa. Interestingly, the concentration of circulating lycopene between 2.17 and 85 μg/dL was linearly inversed with PCa risk whereas there was no linear association >85 μg/dL. In addition, greater efficacy for the circulating lycopene concentration on preventing PCa was found for studies with high quality, follow-up >10 years and where results were adjusted by the age or the body mass index. In conclusion, our novel data demonstrates that higher lycopene consumption/circulating concentration is associated with a lower risk of PCa. However, further studies are required to determine the mechanism by which lycopene reduces the risk of PCa and if there are other factors in tomato products that might potentially decrease PCa risk and progression.
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During aging, lycopene protects from cognitive impairment, insulin resistance and cancer, among the others.
“During aging, lycopene protects from cognitive impairment, insulin resistance and cancer, among the others [169,170,171].”
From The Role of Antioxidants in the Interplay between Oxidative Stress and Senescence (2022) · cites this paper as [169]
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- Authors
- Chen, P., Zhang, W., Wang, X., Zhao, K., Negi, D. S., Zhuo, L., Qi, M., Wang, X., & Zhang, X.
- Affiliations
- National Natural Science Foundation of China (CN)
- Corresponding author
- Zhang, Wenhao
- Zhang, Xinhua
- Venue
- Medicine
- Published
- 2015-08
- Volume
- 94
- Issue
- 33
- Pages
- e1260
- ISSN
- 0025-7974 (ISSN-L)
- PMC
- PMC4616444
- OpenAlex
- W1200081425
- Cited by
- 143
- References
- 67
- Citations by year
- 2026: 8 · 2025: 14 · 2024: 14 · 2023: 8 · 2022: 11 · 2021: 16 · 2020: 26 · 2019: 17 · 2018: 11 · 2017: 8 · 2016: 10
- FWCI
- 1.01
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- cc-by-nd
- Locations
- Medicine (publishedVersion, cc-by-nd)
- PubMed Central (publishedVersion, cc-by-nd)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (N.81270843, 81160086, 81270843)
- Wuhan University
- Topics
- Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
- Keywords
- lycopene, prostate cancer, dose-response relationship, cancer risk reduction, antioxidants, tomato products, cancer prevention
- MeSH terms
- Lycopene, Antioxidants, Carotenoids, Follow-Up Studies, Humans, Male, Phytotherapy, Prostatic Neoplasms, Anticarcinogenic Agents, Outcome Assessment, Health Care, Solanum lycopersicum, Risk Assessment
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