Dec 07, 2017· 1. Eating a “standard” American diet. Wellnessfx has a list of the most magnesium-rich foods you can eat. It includes oat bran, spinach, swiss chard, brown rice, almonds and lima beans… not exactly the typical American fare, which consists largely of meat, refined grains, processed foods and dairy products, none of which contain much, if any, magnesium.