All the goodness of Sustagen Hospital Formula plus the added benefits of soluble and insoluble fibre: Insoluble fibre helps with bowel regularity. Fibre helps you feel fuller longer. Soluble fibre can help lower cholesterol absorption. It also has a lower GI (33) making it an appropriate choice for people with Diabetes. As always, use in consultation with a health care professional. Sustagen Hospital Formula plus Fibre is a great tasting liquid supplement which can be mixed with water or milk.