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- A Study on the Association Between Ginseng Intake and Incidences of Cancer: Kangwha Cohort Study.
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Joo Sun Byun, Heechoul Ohrr, Sang Wook Yi, Jae Suk Hong, Tae Yong Sohn
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Korean J Prev Med. 2003;36(4):367-372.
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Abstract
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- OBJECTIVES
There are many concerns about ginseng as a cancer chemopreventive substance, but there have been few epidemiological studies on ginseng. This study sought to examine the relationships between ginseng intake and cancer incidence in the Kangwha cohort. METHODS: Between March 1985 and December 1999, 2697 males, aged 55 or over, as of 1985, were followed up for their cancer incidence. The cancer incidence rate, standardized incidence ratio and risk ratios were calculated according to ginseng intake. A Cox proportional hazard model was used to adjust for age at entry, smoking, alcohol intake, hypertension, and body mass index. RESULTS & CONCLUSIONS: The ginseng intake group had the same cancer (C00-C97) incidences (Standardized Incidence Ratio: SIR=1.11, 95% Confidence Interval = 0.97-1.27) and the same risk ratio (RR=1.09, 95% Confidence Interval = 0.85-1.41) as the no-intake group. Analyzing the subjects that had followed up from 1990, however, the ginseng intake group had lower cancer incidences at all sites (RR = 0.79, 95% Confidence Interval = 0.58-1.09). This was a cohort study to try and evaluate the association between ginseng intake and the incidences of cancer. The results of this study provide no clear conclusions on the cancer preventive effects of ginseng. Therefore, further study is needed in the future.
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Summary
- The Cancer-preventive Potential of Panax ginseng: A Review of Human and Experimental Evidence.
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Hai Rim Shin, Joon Youn Kim, Duk Hee Lee, Taik Koo Yun, Gareth Morgan, Harri Vainio
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Korean J Prev Med. 2000;33(4):383-392.
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Abstract
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- OBJECTIVE
We have reviewed the potential cancer preventive and other relevant properties of Panax ginseng C. A. Meyer, which has been traditionally used as a natural tonic in oriental countries. DATA IDENTIFICATION AND STUDY SELECTION: Publications on Panax ginseng and its relation to cancer were obtained from the Medline database (1983-2000) and by checking reference lists to find earlier reports. The reports cover experimental models and human studies on cancer-preventive activity, carcinogenicity and other beneficial or adverse effects. In addition, possible mechanisms of chemoprevention by ginseng were also considered. RESULTS: Published results from a cohort and two case-control studies in Korea suggest that the intake of ginseng may reduce the risk of several types of cancer. When ginseng was tested in animal models, a reduction in cancer incidence and multiplicity at various sites was noted. Panax ginseng and its chemical constituents have been tested for their inhibiting effect on putative carcinogenesis mechanisms (e.g., cell proliferation and apoptosis, immunosurveillance, angiogenesis); in most experiments inhibitory effects were found. CONCLUSION: While Panax ginseng C. A. Meyer has shown cancer preventive effects both in experimental models and in epidemiological studies, the evidence is currently not conclusive as to its cancer-preventive activity in humans. The available evidence warrants further research into the possible role of ginseng in the prevention of human cancer and carcinogenesis.
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Summary
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