Kent, Excellent post. A number of companies have attempted to produce a commercially viable quantity of Beta glucan, with pitiful results. Most product on the market right now is either very expensive pharmaceutical grade Beta glucan, or the releatively inexpensively produced poor grade product that is little better than sawdust. The later is ranging from 15% to 25% bioactivity, but costs the same, OR MORE than Agrastim. Bioagra's agrastim is consistently certified as being 80-85% pure bioactive beta 1-3,1-6 glucan. It is very close to pharmaceutical grade at 10%-15% of the price. Nobody else is doing this. Best regards, -zties