Severe iron deficiency can lead to pica, a condition where you want to eat things with no nutritional value. Both Peterson and Davis cite ice as a common craving. But people with pica might also crave ...

Falling short on vitamin D isn’t something to brush off, either. Vitamin D deficiency has been linked to a slew of health ...

Vitamin E is an antioxidant that's essential for eye health. A deficiency can lead to vision loss over time.