Intravenous therapy is an elective, adjunctive treatment in which the delivery of vitamins, minerals, amino acids and antioxidants to a patient by way of the intravenous, or parenteral, route of administration. The purpose of intravenous therapy is to deliver these nutrients in high concentrations to the body tissues and cells in a manner which bypasses the GI tract (i.e., the oral route of administration). All nutrients taken via the oral route (by mouth) once absorbed into the bloodstream of the small intestine are transported immediately to the liver by way of the portal vein. In the liver, they must “undergo screening” by liver enzymes which in some cases will render them less effective or even ineffective. This screening process is known as the “1st-pass effect”*. IV Therapy allows for the delivery of high concentrations of nutrients to the body tissues/cells without the 1st-pass effect.
*although typically used to describe this process with external drugs/pharmaceuticals, this principle holds true for the vast majority of substances taken orally.
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