Green tea
Intervention2 papers4 findings
- Humans1
Outcomes
4Prostate cancer
no changein humans1RR 0.52Moderate certainty
1 study
Prostate cancer
no changein humans1RR 0.52Moderate certainty
Green tea has no effect on prostate cancer in humans (RR = 0.52; 95% CI: 0.22-1.23).
Review
Effects of Green Tea Supplementation on Chemoprevention at Different Stages of Carcinogenesis: A Systematic Review · Phytotherapy research : PTR · 30 Sep 2026
HPV clearance
no changein humans1RR 1.19Moderate certainty
1 study
HPV clearance
no changein humans1RR 1.19Moderate certainty
Green tea has no effect on HPV clearance in humans (RR = 1.19; 95% CI: 0.68-2.07).
Review
Effects of Green Tea Supplementation on Chemoprevention at Different Stages of Carcinogenesis: A Systematic Review · Phytotherapy research : PTR · 30 Sep 2026
Regression of cervical lesions
no changein humans1RR 2.4Moderate certainty
1 study
Regression of cervical lesions
no changein humans1RR 2.4Moderate certainty
Green tea has no effect on regression of cervical lesions in humans (RR = 2.40; 95% CI: 0.36-16.23).
Review
Effects of Green Tea Supplementation on Chemoprevention at Different Stages of Carcinogenesis: A Systematic Review · Phytotherapy research : PTR · 30 Sep 2026
Colorectal cancer
no changein humans1Very low certainty
1 study
Colorectal cancer
no changein humans1Very low certainty
Green tea has no effect on colorectal cancer in humans.
Humans
Risk factors for colorectal carcinoma; a hospital-based study · The Ceylon medical journal · 16 Aug 2023