The 13 essential vitamins are: Vitamins A, C, D, E, and K, the six B vitamins, biotin and folate/folic acid.
The 14 essential minerals are: calcium, sodium, phosphorus, potassium, magnesium, chloride, iron, sulfur, zinc, iodine, fluoride, cobalt, copper, selenium and manganese.
While most multivitamins will contain these ingredients, each one is formulated with different relative quantities – usually to focus on a particular nutritional deficiency or need. Check with your doctor before beginning a multivitamin regimen to see which vitamins and minerals are most important for your personal health.