What is the main function of liver?

Answer 1

There is just isn't one main function of the liver. You can't live without it.
The liver is a metabolically active organ responsible for many vital life functions. The primary functions of the liver are:
Bile production and excretion
Excretion of bilirubin, cholesterol, hormones, and drugs Metabolism of fats, proteins, and carbohydrates
Enzyme activation Storage of glycogen, vitamins, and minerals
Synthesis of plasma proteins, such as albumin, and clotting factors
Blood detoxification and purification

Answer 2

produce bile, filter and remove toxins in the blood, break down fats (bile) and produce cholesterol. Not a complete list.

Answer 3

To remove toxins from the body.