FACT: It can take the body anywhere from 12-48 hours to digest solid foods completely. IV therapy is an immediate way for you to feel the effects of all the essential nutrients, compared to when ingested. Once the IV is inserted, the vitamin infusion goes directly into the bloodstream. The body then uses the vitamins and minerals to perform and facilitate many essential functions, including regulating metabolism, creating red blood cells, and maintaining the immune system. You may feel the physical effects, such as increased energy, right away depending on your nutritional and hydration levels. In some cases, you may even see better skin complexion and improved mood for subsequent days.