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This study was conducted to investigate the effects of black raspberry wine which was administered per os on estrogen levels in Splague-Dawley(SD) rats. Black raspberry wine containing 13% alcohol(v/v) was prepared from ripe fruits of Rubus coreanus fermented with Saccharomyces cervisiae. The rats were divided into 2 groups(A and B): The group A received black raspberry wine and the group B received saline for 7 weeks. All animals were bi weekly monitored for estrogen levels by radioimmunoassay using 125I labeled anti-estrogen monospecific antibody. There was a significant(2.02 fold) increase in estrogen levels in the group A with a peak at the 7th week post administration of black raspberry wine. There was no significant change in estrogen levels of the rats in the group B. These data point to uncharacterized phytoestrogenic bioactivity of black raspberry wine that appears to be a useful phytoestrogenic herbal remedy for human health.