There are different beta glucans on the market with yeast, oats and medicinal fungi being the most common sources. Many have attempted to compare the different products, using a series of different tests aimed at demonstrating immune stimulation/modification.
For any of these tests to have any relevance to the actual use of the products, they must be tested in the environment in which they will be used. Thus, for use as a dietary supplement, the tests must be carried out in humans taking the product as intended. GlycaNova’s products are soluble and taken orally, thus all the tests results we report arise from tests and trials with human volunteers.
That there are differences between the various beta glucan products is demonstrated by the daily recommended doses give below (the figures are taken from the literature provided by the relevant companies):