By Lisa Rapaport (Reuters Health) – A diet rich in magnesium – found in foods like leafy greens, fish, nuts and whole grains – may help lower the risk of chronic health problems like heart disease and diabetes, a research review suggests. Some previous studies linked insufficient magnesium levels to a greater risk of developing a wide range of health problems including chronic obstructive pulmonary disease (COPD), diabetes, Alzheimer’s disease, and cardiovascular disease, said lead study author Dr. Xuexian Fang, a nutrition researcher at Zhengzhou University in China.