5 Healthy foods that can be harmful if you eat too much of them

Red Meat, Oysters, And White Beans

All three are top sources of iron, which plays an essential role in delivering oxygen to your muscles. And while too little iron can leave you feeling weak and tired, getting too much can lead to liver failure.

Of course, plenty of people struggle to get enough of the mineral in their diets. So iron overload tends to be pretty rare, especially if your only source of iron is food, says Cording. But if you’re taking an iron supplement? It might be worth talking to a dietician. “It’s important to know what your needs are and get a handle on how to balance food sources and supplements,” says Cording.