According to the National Health and Nutrition Examination Survey, absolute and functional iron deficiency both affect a large percentage of adults in the US -- around 14% and 15%, respectively.

Factor II deficiency is a rare bleeding disorder. Symptoms can vary from mild to severe. It may be inherited or a result of other factors, such as medication disease or an autoimmune response.

Severe iron deficiency anemia can cause hair loss. This includes androgenetic alopecia or pattern hair loss. Iron deficiency anemia occurs when a person does not have enough iron in their system.

Protein deficiency due to a low protein intake in the diet is unusual in the U.S. According to the Dietary Guidelines for Americans 2020-2025, a healthful eating pattern includes a variety of ...

Vitamin K deficiency is rare. This vitamin is made naturally by bacteria in the gut and is found in several food sources, namely leafy green vegetables and vegetable oils. Not getting enough vitamin K ...

Iodine deficiency is a nutritional imbalance that happens when you don't have enough iodine in your diet. Iodine affects your ability to produce thyroid hormone, which can lead to a number of health ...

This guideline technical document outlines the evaluation of the available information on arsenic with the intent of updating the guideline value for arsenic in drinking water. The purpose of this ...