A medium banana is a supportive, not top-tier, magnesium source. It typically provides around ~30 mg of magnesium, with variation by size and type. Since adult daily needs are in the hundreds of milligrams, a banana won’t cover requirements on its own, but it can contribute to the daily total. Bananas are convenient and also provide potassium and fiber. To raise magnesium intake more meaningfully, pair a banana with stronger sources like pumpkin seeds, almonds, yogurt, or oats. Think of banana as a helpful component in a balanced plan, not a miracle magnesium fix.