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Green Tea Extract Shown to Support Prostate Health

A new study has linked a green tea extract supplement with lowering the rate of prostate cancer in men with high-grade prostatic intraepithelial neoplasia (HGPIN) and without atyipcal small acinar proliferation (ASAP). The supplement was also found to lower levels of the cancer biomarker prostate-specific antigen (PSA).

HGPIN is an abnormality of prostatic glands and is believed to precede the development of prostate cancer. ASAP is a collection of small prostatic glands that cannot be determined as benign or malignant. After a diagnosis of ASAP, the chance of finding prostate cancer in a subsequent biopsy is approximately 40%.

Participants in the study included 97 men who all had HGPIN and/or ASAP. They were given either 400 mg of epigallocatechin-3-gallate from green tea or a placebo daily for one year. The researchers compared prostate cancer rates, the cumulative rate of prostate cancer, blood PSA levels and the rate of development of ASAP in men with only HGPIN at the beginning of the study.

At the conclusion of the study, there were no significant differences found in the total number of prostate cases between the supplement and placebo groups. However, the men in the supplement group who only had HGPIN at the beginning of the study had a lower combined rate of ASAP and prostate cancer development.

Additionally, the green tea extract group had significantly lower PSA levels than those in the placebo group.

Researchers from the H. Lee Moffitt Cancer Center and Research Institute conducted the study. It was published online ahead of print on April 14, 2015, in Cancer Prevention Research.

Green tea has been linked in previous studies with numerous health benefits. These benefits are usually attributed to the high level of powerful antioxidants found in green tea called polyphenols, which have been shown to promote weight loss, improve heart health, aid in digestion and decrease the risk of neurodegenerative diseases.
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