The word vitamin is derived from 2 words that is Vita means vital to the body and Amine that is the initial vitamins discovered are amine in nature, so scientist gave name vitamine but later they came to know that all vitamins are not amines, therefore they removed the letter ‘E’ from vitamine and gave the name vitamin

Definition:

Vitamins are organic micronutrients, essential for growth and development, generally not produced in the body(there are exceptions) hence supplied through diet. To know more about definition and classification please watch the video below.

Classification of water soluble vitamins

Water-soluble vitamins are vitamin B-complex and vitamin C.
Examples for B-Complex vitamins are Thiamine(B1), Riboflavin(B2), Niacin(B3), Pantothenic acid(B5), Pyridoxine(B6), Biotin, Folic acid and Cobalamine(B12).

Thiamine [B1]

Sources of Thiamine

Sources of thiamine include outer coverings of food grains like rice, wheat, oilseeds, nuts, whole cereals, pulses, green peas, salmon, meat liver and egg.

RDA

Recommended dietary allowance[RDA] is about 1-1.5mg/day.

Coenzyme form or Active form:

Active form or coenzyme form of thiamine is TPP and TTP.

Functions:

Thiamine is an essential vitamin required by the body and plays a very important role in carbohydrate metabolism, hence maintaining cellular function.

Deficiency:

Thiamine deficiency status is known as Beriberi can affect the nervous system and heart. If the heart is involved then we call it as wet beriberi because of edema. Dry beriberi is with peripheral neuropathy without the involvement of the heart. In chronic alcoholics, the involvement of the central nervous system called cerebral beriberi. Infantile beriberi is beriberi in infants born to mothers suffering from thiamine deficiency.

For deeper understandings on thiamine like sources, metabolic functions and deficiency disorders please watch below video.