There are many different kinds with many different claims, but specifically targeting Insulin secretagogues it is designed to cause the pancreas to secrete insulin into the bloodstream, thus giving greater natural insulin levels.
What you want out of a proper GDA, is all three benefits. Sensitizing, Mimetics, and Secretagogues. These all do similar things, but they have different outcomes, and when properly formulated, will produce the greatest benefits. GH can touch if he wants, this is a big subject
