Without IV therapy, the body can absorb most vitamins and nutrients through food. However, with foods having lower nutritional value than ever before due to pesticides, growth hormones and additives in addition to other factors that can affect the body's ability to absorb nutrients most people only get between 40-70% of their nutrients. Some barriers to absorption include: age, metabolism, health status, medications, and alcohol consumption. By receiving a liquid IV, vitamins and nutrients enter the bloodstream immediately. Bypassing any digestive or absorption issues. The IV process requires less time to work, normally between 30-60 minutes to get a 1 liter bag of fluid in.