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Beta 1, 3-D glucan is the sole active ingredient in Beta Glucan. It is derived from the cell walls of baker’s yeast, making it the precise substance for which the actual glucan macrophage receptor (CR3, mac-1, CD11/CD18) has been identified. Beta 1, 3-D glucan is technically a polybranched polyglucose – so complex some refer to it as a fiber.
