The product from Improve USA is excellent. In fact, they provided me with a chart (which I believe can be downloaded on their website) which shows a comparison with Manapol and the two are virtually identical in the molecular sizes of the polysaccharides. The freeze dried is the product that you want and is sold by the pound ($220.00 a pound as compared to 2000 a pound). By the way the laboratory director for Improve USA used to work for Carrington Labs and is very familiar with their product. I'm not sure about Duane's point about the ingredient that enhances the laxative aspect of aloe vera, but then again it doesn't hurt to stay regular. I haven't seen any inappropriate laxative effects in either myself or member of my family that take it. In any event I will look into it.