| Vitamin | Source | Function | Deficiency symptoms |
|---|
| WATER-SOLUBLE | | | |
| B1 (thiamin) | Liver, legumes, whole grains | Coenzyme in cellular respiration | Beriberi, loss of appetite, fatigue |
| B2 (riboflavin) | Dairy, meat, eggs, green leafy vegetables | Coenzyme in FAD | Lesions in corners of mouth, eye irritation, skin disorders |
| B3 (niacin) | Meat, fowl, liver, yeast | Coenzyme in NAD and NADP | Pellagra, skin disorders, diarrhea, mental disorders |
| B5 (pantothenic acid) | Liver, eggs, yeast | Found in acetyl CoA | Adrenal problems, reproductive problems |
| B6 (pyridoxine) | Liver, whole grains, dairy foods | Coenzyme in amino acid metabolism | Anemia, slow growth, skin problems, convulsions |
| B7 (biotin) | Liver, yeast, bacteria in gut | Found in coenzymes | Skin problems, loss of hair |
| B12 (cobalamin) | Liver, meat, dairy foods, eggs | Formation of nucleic acids, proteins, red blood cells | Pernicious anemia |
| Folic acid | Vegetables, eggs, liver, whole grains | Coenzyme in formation of heme and nucleotides | Anemia |
| C (ascorbic acid) | Citrus fruits, tomatoes, potatoes | Formation of connective tissues; antioxidant | Scurvy, slow healing, poor bone growth |
| FAT-SOLUBLE | | | |
| A (retinol) | Fruits, vegetables, liver, dairy | Found in visual pigments | Night blindness |
| D (calciferol) | Fortified milk, fish oils, sunshine | Absorption of calcium and phosphate | Rickets |
| E (tocopherol) | Meat, dairy foods, whole grains | Muscle maintenance, antioxidant | Anemia |
| K (menadione) | Intestinal bacteria, liver | Blood clotting | Blood clotting problems |