The tubers store the carbohydrate inulin (not insulin) rather than starch. It is an important source for the fructose industry. The tubers have a consistency like potatoes, but it has a nuttier flavor. Because of the carbohydrate in the JA they have a tendency to get mushy if they are boiled. They are better if they are steamed or sliced thinly and eaten raw in a salad. A German liquor called Topinambur is distilled from the tuber. They are very high in potassium and iron.
They can be very invasive, if even a very small piece of tuber is left in the ground it will continue to grow. So give careful consideration to where you plant them.
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