Diabetes is currently the 7th leading cause of death in the U.S. It also doubles one's risk of having a heart attack or stroke so it is important to avoid diabetes and to take proper care of yourself after a diabetes diagnoses.
Adding green vegetables to your diet is one of the most important things you can do for yourself. Nutrient-dense green vegetables including leafy greens and cruciferous vegetables, along with other green vegetables are probably the most important foods to focus on for diabetes prevention and/or reversal of this dreaded disease. Recent studies have shown that a higher intake of green vegetables is associated with a lower risk of developing type 2 diabetes and if you already have the disease, a higher green vegetable intake is associated with lower A1C levels. A recent meta-analysis found a greater consumption of leafy green vegetables was associated with a 14% decrease in the risk of developing type 2 diabetes. Another study reported that as little as one serving a day of leafy greens brought about a 9% decrease in risk.
Your mother was right, eat your vegetables especially the green leafy ones!