Typically, reports of deficiency symptoms are common if there is widespread deficiency of a nutrient. (whfoods.org)
Because of the central role of vitamin B1 to energy metabolism, deficiency of this nutrient impairs nearly every important function in the body. (whfoods.org)
Due to variations in how triage is programmed, deficiency of a nutrient during pregnancy may present with somewhat different symptoms than deficiency during another period of life. (perfecthealthdiet.com)