What are diabetic foot ulcers?What are the main signs and symptoms of diabetic foot ulcers?How are diabetic foot ulcers diagnosed?What are some of the main medical treatments for diabetic foot ulcers?Have any supplements been studied for diabetic foot ulcers?How could diet affect diabetic foot ulcers?What causes diabetic foot ulcers?What are the complications of diabetic foot ulcers?How can diabetic foot ulcers be prevented?