Vitamin B-1 (Thiamine)

Functions: 

• Facilitate growth and maintenance of nerve and muscle tissue
• Contributes body release energy from carbohydrates
• Promotes normal appetite

Deficiency

• Beriberi: fatigue, weakness, nerve disorders, mental confusion, apathy, heart irregularity and failure, swelling

Recommended Requirement 

• 1.2 mg
• Oral doses of 500 mg/d or less are considered as safe. But don't take without your doctors prescription.
• High intake are rapidly excreted by kidneys. Toxicity not known. 

Sources

• Wheat germ, Pork, Whole and enriched cereal grains, dried beans, milk and milk products, seafood