Barley powder has a high amount of insoluble fiber, up to 30% by dry weight. Many of us, particularly those with D, would have trouble with this product even when mixed it a soluble fiber supplement.
Windchimes, are you IBS-C, IBS-D or IBS-A? It would be helpful if you put it in your signature so others known when you post.
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS