A problematic symptom of having Diabetes or "sugar" is poor circulation, especially in the feet and legs (lower extremities) and poor healing of any sores and wounds. It is so important for people with diabetes to take really good care of their feet and to be careful. What happens is the the arteries aren't getting enough fresh or oxygenated blood to the lower parts of the body. Without this fresh blood, the body has a hard time getting all of the energy it needs to keep the muscles working in top condition. Combine poor circulation with poor movement, being over weight, and poor nutrition and it can inevitably lead to ulcers or festering sores in the lower extremities. If patients or their caretakers don't take them to the doctor soon enough it can lead to an amputation, often of a leg or foot.
Health researchers at Northwestern University, in Chicago have summarized a 20 year of study of diabetes patients in the Chicago area and found that black patients, primarily from the south and west sides are more likely to have a limb amputated. They found that African Americans have 5 times higher amputation rate than whites.
Read the entire article on ScienceBlog.
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