Symptoms, Classic

What Is Vitamin B3 (Niacin)? Niacin is an essential water-soluble B vitamin that is required by all cells of the body. During digestion of food containing it, niacin (the form in food) is changed in the small intestines to the active form niacinamide (niacin ...

What Is Vitamin B6 (Pyridoxine)? Pyridoxine is an essential vitamin that is required for the health of nerves, bones, blood, arteries, blood sugar, the immune system and metabolism of proteins. Two important functions of pyridoxine involve coenzymes that are involved ...

What Is Vitamin C? Vitamin C, also called ascorbic acid or ascorbate, is an essential water soluble vitamin. Fresh supplies of vitamin C are required every day to perform vital roles throughout the body among which are the production of ...

What Is Vitamin D? Vitamin D is the principle regulator of calcium homeostasis (balance) in the body.  This “vitamin” is really a prohormone, meaning it acts like a hormone but is not. Vitamin D does, however, contain cholesterol in its molecular ...

What Is Vitamin E? Vitamin E is not a single vitamin but naturally occurs as a fat-soluble vitamin family that consists of at least 8 distinct molecules. These molecules include 4 tocopherols (alpha, beta, gamma, and delta) and 4 tocotrienols ...

What Is Vitamin K? Vitamin K is a family of fat-soluble vitamins, called K vitamers, that exists in three forms: K1 is a natural form found in plants (phylloquinone); K2, found in some animal foods, is synthesized in the intestine ...

What Is Vomiting? Vomiting is the regurgitation of swallowed food back out of the mouth. What Is Vomiting In Celiac Disease and/or Gluten Sensitivity?

What Is Unexpected Weight Loss? Unexpected weight loss is unintentional loss of body mass composition or inability to gain weight marked by decreased serum proteins and increased stool fat.1 What Is Unexpected Weight Loss In Celiac Disease and/or Gluten Sensitivity? ...

What Is Zinc? Zinc is an essential trace mineral that is involved in numerous aspects of cellular metabolism, being essential for activation of almost 200 enzymes that have vital roles in the body. Q: What happens when enzymes do not ...

What Is Zincemia? Zincemia means the zinc level in blood plasma is too low to meet metabolic needs of the body for this mineral. Q: How important is a normal blood level of zinc? A: A low blood level of ...