Transfer Point sets the industry standard by providing a Beta Glucan with an average of 91% Beta-1, 3D Glucan content. Every batch of our Glucan 300® is independently tested, and we don’t accept a purity of less than 85%. Research proves that purity matters when it comes to biological activity. No other Beta glucan can match the effectiveness that has made Transfer Point’s Glucan 300® the most respected name in immune support.