Also the liver is involved in any toxic substances we put into our body and this includes artificial sweeteners, artificial colors, preservatives, and so forth. Our body does not excrete all those toxins and keeps them running through us (they have to go somewhere), so the liver has to jump into action. Now the liver can only do so much before it gets overwhelmed (as we see with the buildup of fatty deposits from high intakes of High Fructose Corn Syrups), but did you know the liver is also an important fat burning organ? It is responsible for making key enzymes that help to release fat from fat cells to be used as energy in the body. But a sick liver will mean an impaired fat burning process and a body primed for increased weight gain.