In the 2017 edition of the OU Guide for Passover (page 100) Nutrisource Benefiber is listed as approved for those who are ill. The correct name for this product is Nutrisource Fiber. It should be noted that a product called Benefiber, manufactured by Glaxo Smith Kline (GSK) contains wheat dextrin (as listed in the ingredients label) and is chametz and one should not eat or possess this product on Passover. Another product called Benefiber, manufactured by Novartis and sold in Israel, contains guar gum (as listed on the ingredients label) and is chametz-free.  " />In the 2017 edition of the OU Guide for Passover (page 100) Nutrisource Benefiber is listed as approved for those who are ill. The correct name for this product is Nutrisource Fiber. It should be noted that a product called Benefiber, manufactured by Glaxo Smith Kline (GSK) contains wheat dextrin (as listed in the ingredients label) and is chametz and one should not eat or possess this product on Passover. Another product called Benefiber, manufactured by Novartis and sold in Israel, contains guar gum (as listed on the ingredients label) and is chametz-free.  "/>