Being that I lack potassium I could eat tuna, salmon, and yogurt. If you have too much potassium in your body you can develop a disease called hyperkalemia, which is where you have high potassium in your blood.
Iron is an essential element for blood production. About 70 percent of your body's iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin. Eating red meat, and beans is a good way for me to get more iron in my diet. Having too much iron in the diet can cause hemochromatosis which happens when too much iron builds up in the body.
Magnesium is a cofactor in more than 300 enzyme systems that regulate different biochemical reactions in the body, including protein synthesis, muscle and nerve function, blood glucose control, and blood pressure regulation. If I ate more dark leafy greens and seeds that would help boost my magnesium levels. There is no proven problem that happens when you eat too much