Nuts are another tasty and nutritious snack that are chockful of magnesium. Some of the nuts with the highest amounts include Brazil nuts, almonds, and cashews. 1-ounce of cashews has 82 mg of magnesium, which equals 20% of the RDI. Although most nuts are considered a great source of monounsaturated fat and fiber, they can also help improve blood sugar and cholesterol levels in those diagnosed with diabetes. And since nuts are considered anti-inflammatory and very beneficial to heart health, it can also help lessen one’s appetite when eaten as a snack.