Humans can eat acorns, but they are not safe to eat raw due to their high tannin content, which is bitter and can be toxic in large amounts. The tannins reduce nutrient absorption and may cause liver and kidney damage if consumed excessively. However, acorns can be made safe and edible by properly preparing them, usually by soaking or boiling to leach out the tannins. After this process, acorns are nutritious and can be eaten roasted or ground into flour for baking. Acorns have historically been consumed by various societies and remain abundant in the wild. They are rich in fiber, antioxidants, iron, and manganese. Eating properly prepared acorns may benefit gut health and provide antioxidant effects. However, some people may be allergic to acorns, as they are tree nuts. Collecting and preparing acorns can be time-consuming, but foragers find them a sustainable, nutritious food source.
