| Factor | Name | Sources | Role | Disease related to the deficiency |
|---|---|---|---|---|
| Vitamin B2 | Riboflavin | vegetables, yeast, milk | Factor involved in oxidation-reduction reactions. | Normochromic normocytic anemia |
| Vitamin B3 | Niacin | meat, beer yeast, cereals | It is involved particularly in the DNA repair process, in the production of steroid hormones and is necessary for cellular oxidation-reduction reactions. | Pellagra |
| Vitamin B6 | Pyridoxin | meat, vegetables | It is a cofactor in several enzymatic reactions involving the metabolism of amino acids, glucose and lipids. | Pellagra (indirectly) |
| Vitamin B9 | Folic acid | kidney, liver, green leafy vegetables, legumes, eggs | Its principal biological role is related to the synthesis of DNA and RNA and in the prevention of genetic alterations. | Megaloblastic anemia |
| Vitamin B12 | Cobalamin | meat, milk, eggs | It is involved in the cells metabolism with several functions such as DNA synthesis, regulatory functions of the nervous system or in the amino acid metabolism. | Pernicious anemia |
| Iron | Iron | meat, vegetables | It carries oxygen in the hemoglobin, in the myoglobin and is also involved in several enzymatic reactions. | Iron-deficiency anemia |
| Zinc | Zinc | Animal-sourced foods and some vegetables | It is involved in various biological reactions in the human body, from cell growth to normal immune function to wound healing. | Different physiological alterations |