Liver – the Largest Filter and the Largest Gland in our Body Your liver cleanses the blood of toxins, fights infections, creates bile, breaks down fats and participates in the excretion of digestive (metabolic) waste. Proteins, fats, and carbohydrates are processed through it. The liver produces bile acids, bilirubin, and cholesterol. In addition, the liver stores vitamins A, D, E and B12, as well as iron. From that, you can see how necessary the importance of a healthy liver