Bio-Botanica has received U.S. Patent #7,658,955 for its Puresterol ingredient, which is an extract of Pueraria candollei var. mirifica A Shaw. & Suvat. Pueraria mirifica has been shown to be a promising phytoestrogenic and support herb for menopausal women. Bio-Botanica’s patented extraction process optimizes the miroestrol component in the Pueraria mirifica extract, according to the company.