Selenium deficiency occurs in the some critical group of people.
Symptoms of selenium deficiency are present only in people who live in areas where there is little selenium in the soil. Some parts of Europe, U.S., New Zealand and China are places where there is small amount of selenium in the soil. More!
Role of folic acid for humans
This vitamin is involved in the biosynthesis of nitrogen bases, nucleic acids (and thus in the synthesis of DNA), creatine, methionine and serine amino acid. More!
Is vitamin B15 useful or harmful for humans?
While some believe that this vitamin is »miracle« in a positive sense (especially in the former Soviet Union), others forbid it (in the U.S.). More!
Vitamin B12 is associated with anemia.
The history of vitamin B12 studing is closely related to the examination of the causes of anemia and develop methods for its treatment. More!
Deficiency and excess of fluoride cause the teeth problems!
Fluoride helps strengthen tooth enamel, but its excess leed to enamel fluorosis. More!