IV vitamin therapy is rapidly absorbed by the body. The contents of the IV solution are then easily utilized by the body. The nutrients are introduced directly to the circulatory system, and are able to reach the organs at a rapid rate. Oral vitamins are synthesized by different organs before you can utilize them. IV vitamins don't need to pass the liver - a process called "first pass." Because of this, the stress put on the liver is lessened. What's great about IV vitamin therapy is that it results in "tissue saturation." In this process, the nutrients are brought forth to the areas where they are needed, without loss, since they don't pass by the liver anymore. Over time, the intestines' capacity for absorption is lessened. There is also a decrease in the production of pancreatic enzymes and hydrochloric acid, which aide in processing food which contains the nutrients we need. As a result, nutritional deficiencies take place, especially in older people. Oral vitamins are not advisable because they need to pass through the said organs. This is why IV vitamin therapy is recommended for people who suffer from the natural effects of the aging process. The result is immediate.