5 'Healthy' Foods You Can Overdose On

Carrots. Carrots are known for their high beta-carotene content, which is essential for vision and immune system health. Bananas. Bananas are rich in potassium, but excessive consumption can be harmful, especially for those with kidney damage. Water. Too much water can cause hyponatremia, an electrolyte imbalance caused by low sodium levels in the body. Tuna. Tuna, a nutritious fish with high Vitamin B12 and omega-3 fatty acids, contains methylmercury, a chemical found in smaller fish. Brazil Nuts. Brazil nuts, rich in heart-healthy monounsaturated fats and selenium, can be beneficial in small doses but can be toxic when overdoed.