Final answer:
Water-soluble vitamins, such as the eight B vitamins and vitamin C, are not stored in the body and are easily excreted. Excess intake of water-soluble vitamins is rare but can occur with excessive use of vitamin supplements.
Step-by-step explanation:
Water-soluble vitamins, including the eight B vitamins and vitamin C, are absorbed with water in the gastrointestinal tract. These vitamins move easily through bodily fluids, which are water based, so they are not stored in the body. Excess water-soluble vitamins are excreted in the urine. Therefore, hypervitaminosis of water-soluble vitamins rarely occurs, except with an excess of vitamin supplements.