The extract is then tested for its ability to inhibit 5-alpha reductase. Because saw palmetto palms simply cannot be cultivated like farm raised products and since it only grows in the Southeastern portion of the USA and harvested primarily in the State of Florida, USA anyone claiming that their product comes from Southern Asia is simply not selling you genuine saw palmetto extract but likely a mislabeled ingredient. At Valensa we maintain a complete chain of custody because of our integrated capabilities from berry harvest purchasing, affiliate drying, CO 2 extraction and product extract packaging.
Saw palmetto extract may decrease the effectiveness of estrogen products by reducing estrogen levels in the body via its antiestrogenic effects.  It can interfere with the use of birth control pills that contain estrogen as an active ingredient. As a result, it is recommended that an additional form of birth control, such as a condom, be used to prevent pregnancy in patients taking birth control pills with saw palmetto extract. In addition, saw palmetto extract can also interfere with hormone replacement therapy by reducing the effectiveness of estrogen pills. The combination of saw palmetto extract with estrogen products should be used with caution. 
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