If your body doesn't get enough iron or B12 over a long time, you might feel foggy-headed and less motivated to get things done.

This study found that kids with low iron had trouble thinking and learning, and when they got iron treatment, they got better. This supports the idea that not having enough iron can make your brain feel foggy and less motivated.

When kids don’t have enough iron, their brains don’t work as well—but giving them iron supplements helps them think clearer and pay better attention, which means low iron can make you feel mentally foggy and less motivated.

This study shows that not having enough iron can make it harder for kids to think clearly and stay motivated, which supports the idea that low levels of important nutrients like iron can mess with your brain power.