Thiamine – Genetic Variations in Need for B1

Thiamine (vitamin B1) is a water-soluble vitamin that serves as a cofactor in the metabolism of carbohydrates, branch chain amino acids, and fatty acids. It is essential, meaning you have to get it from food. Not to mention, ATP production, used in every cell for energy, requires thiamine.
The importance of thiamine:
Severe deficiency of thiamine leads to beriberi, and less severe deficiency can cause fatigue, gut issues, headaches, and irritability.[ref]

Symptoms of beriberi include emotio...