4. Spinach (Nitrates and Oxalates)
Spinach is a superfood packed with iron, fiber, and vitamins. However, it contains high levels of oxalates and nitrates, which, in large amounts or under certain conditions, can cause health problems. Oxalates can contribute to kidney stones, while nitrates may convert to nitrites and affect oxygen delivery in the blood.
This is particularly concerning when spinach is reheated or stored improperly. Reheating spinach that’s already been cooked can increase nitrite content, especially if it’s kept at room temperature for a while. Babies and young children are most vulnerable to these effects.
People with kidney issues or a history of stones are often advised to moderate their spinach intake. Excessive consumption can lead to a buildup of oxalic acid, reducing the absorption of calcium and iron.
That said, spinach remains incredibly healthy when eaten fresh or lightly cooked and in balanced portions. Don’t avoid it altogether, but avoid overconsumption and reheating, especially for baby food.
