A customer asks, “Is beta sitosterol toxic to mens testosterone. Is it estrogenic. Is it bad for men's sexual health?” Beta-sitosterol, more often written as β-sitosterol, is a phytosterol, which essentially means plant steroid, similar in structure to cholesterol. You can notice the word -sterol … [Read more...] about Beta-Sitosterol – Is this Phytoestrogen Good or Bad?