IV is short for intravenous, which means inside the vein. Fluids and medicines are delivered into the vein through a catheter (a hollow plastic tube). Our VitaFit IVs consist of 250-1000 ml of fluid along with a mixture of vitamins, minerals and antioxidants. IVs are the fastest way to deliver fluids and vitamins throughout the body with 100% absorption into the bloodstream and take about 45-60 min to infuse. A VitaFit Shot is a quick 15-second injection that delivers a smaller amount of vitamins and aminos into the muscle. There is no IV access required with VitaFit Shots. The dosages of vitamins also differ due to smaller volumes can be injected into the muscle, although the absorption rate is almost equal to that of IV going directly into the bloodstream.