water-soluble vitamin (role) CHEBI:27314 wasserloesliche Vitamine water-soluble vitamin water-soluble vitamins Any vitamin that dissolves in water and readily absorbed into tissues for immediate use. Unlike the fat-soluble vitamins, they are not stored in the body and need to be replenished regularly in the diet and will rarely accumulate to toxic levels since they are quickly excreted from the body via urine. chebi_ontology vitamin (role)