Psyllium husks are used as a bulk forming laxative, and consumed primarily as a fiber additive. Recently though, there have been suggestions that they may have more than just a laxative effect.

Psyllium is the fiber used in Metamucil, and other mucilaginous laxative types. It has been hotly debated in its time, but is now considered safe by most sources. Because it is a fiber laxative, it reacts in a much more natural way in your body than harsh chemical laxatives.

Recently, there have been other studies done that suggest that psyllium may have a minor blood sugar lowering affect as well as gaining the benefits of increased fiber in the diet. It is also useful for encouraging weight loss, helping you to feel full with a meal, and in reducing risks of colon cancer due to frequent constipation.

Not bad for a husk that would normally be thrown away.

One problem diabetics may have with it is that most commonly available forms are flavored, and often with high amounts of sugar. Sugarfree versions are available, but daily consumption of sugar substitutes is not always wise either. I have no real solution to that, you sort of have to choose whether you will adjust for the sugar, take the risk of the sugar substitute, or find an unsweetened version to add to a glass of juice or other beverage.