[Interrelationship between manganese, vitamin B1 and the level of pyruvic acid]

Addition of manganese to the diets promotes an increase of the total thiamine content in the blood and the liver, heart and brain tissues. This trace element appreciably changes the correlation between different thiamine fractions. The free vitamin B1 level in the blood and tissues decreases, while the level of its bound form (pyrophosphatic) increases. All the administered manganese doses induced a statistically significant reduction of pyruvic acid concentration in the blood.