How To Raise Magnesium Levels Quickly & Naturally: Whole grains. Wheat bran and oats are rich in magnesium. ... Nuts. Almonds, cashew nuts, pistachios, peanuts, and walnuts are loaded with magnesium. Vegetable seeds. ... Potatoes and leafy vegetables. ... Fruits. ... Rock salt and sea salt. ... Ragi. ... Coconut. Aug 19, 2019