Oil is not easily absorbed by the human body since we are primarily composed of water. The body does however have a natural mechanism for breaking apart oil and absorbing it into the bloodstream. The problem is that much of the oil passes through the digestive system before the body can fully absorb the oil. The mechanism the body uses is similar to emulsification. The body will pull the oil apart using bile and capture it inside a small bubble-like structure composed of bile salts. These small bubbles have greater surface area aiding the enzymatic activity of pancreatic lipase which further breaks the bubbles down allowing easy absorption into the bloodstream. When we capture drug molecules inside nanometer-sized bubbles the body does not need to act on the bubbles to achieve absorption. The drug is then more readily absorbed by the body.