Hypertension can be caused by a build-up of plaque in your arteries.
Shiitake mushrooms (Lentinula edodes, formerly Lentinus edodes) can reduce cholesterol from the inside out. In a Japanese study, pre-pubescent girls were given equal amounts of butter (known to raise cholesterol faster than almost anything else) and shiitake. At the end of the study the girls all had lower blood cholesterol levels. At about $5/ounce dried, dried shiitake is one of the cheapest and most beneficial foods to add to your diet. Since most mushrooms are 80-95% water by weight, a dried ounce of shiitake should rehydrate to 16-19 ounces after rehydrating.
Some people don't like mushrooms. But the taste of mushrooms is largely disliked because of the texture. By powdering dried mushrooms, the texture is largely removed, but the flavor remains. I add powdered shiitake like pepper to many foods, like meats, vegetables, and soups.
Shiitake is also known to be an immuno-activating mushrooms, meaning it activates your body's immune system. Diabetics, such as I am, by definition have impaired immune systems.