Green beans are a great vegetable pick for diabetics, for they are a lowly 15 on the glycemic index. In addition, they are a non-starchy vegetable and are high in soluble fiber. Because soluble fiber is burned slowly by the body, the body’s blood sugar remains level once the green beans enter the bloodstream; therefore, when green beans are consumed in normal portion sizes, they will not have any negative effect on a diabetic’s blood sugar levels. In fact, green beans can actually contribute to a healthy blood sugar level. Like carrots, green beans also contain beta-carotene (a preventer of Type 2 diabetes). Further, in addition to beta carotene and their high fiber content, green beans also contain tryptophan, which is an essential amino acid that has been shown to help prevent Type 2 diabetes. Green beans are most definitely a powerhouse vegetable for diabetics.