Dairy products are a significant source of bioactive peptides, small pieces of protein which may have an effect on our health. These effects may be antimicrobial, antioxidative, or blood pressure lowering. The traditional Norwegian cheese, Gamalost, which is naturally high in protein (50%) and low in fat (<1%), has been found to be particularly high in these bioactive peptides. Specifically, the cheese was found to have a very high ACE-inhibitory activity, meaning it has the potential to lower blood pressure without the use of pharmaceuticals.