How Much Potassium In A Tuna Fish Sandwich?

How Much Potassium In A Tuna Fish Sandwich? Protein (g) 42.09 Magnesium, Mg (mg) 44.55 Phosphorus, P (mg) 268.95 Potassium, K (mg)391.05 Sodium, Na (mg) 557.7 Is tuna mayo sandwich healthy? Many tuna sandwiches are loaded with mayonnaise and served on highly processed bread. This is not a healthy choice. Your tuna sandwich is only