Optimal nutrition is the best (biochemically and practically) nutritional model for a human. Among all nutritional models optimal diet the least overstrain the liver, therefore, it should be used by patients with all liver diseases including cirrhosis of liver.
Saturated fats (animal fat) of long chains is not directed to the liver but straight to the blood, because they are suitable to all tissues. All the rest of chemical compounds except vitamins which are dissolved in fat must be processed by the liver.
What liver doesn't like?
The liver doesn't like too much proteins. The proteins should be the highest biological value (e.g. yolk of egg), which require the least of work and energy to adapt to the need of the body.
Proteins of low value (e.g. bean, pea) are very little similar to human protein, their adoption to the need of body requires a great amount of work, energy, vitamins and mineral elements.
The requirement of protein during optimal diet is 2 - 3 times smaller than the requirements in other nutritional model and remains in the limit of 30-40g for the adult person, not 110-120g consumed (with harm) by the average person or 160-200g consumed by the so-called elite. The process of over consumption of proteins by liver requires a lot energy and loss of the substantial amount of hydrogen, which body can't burn but have to discharge with nitrogen. To discharge one particle of nitrogen the body has to use 4- particles of hydrogen but when nitrogen is discharged with ammonia only 2-particles of hydrogen are required.
Synthesis of urea requires presence of ammonia, carbon dioxide, 6 amino acids, 5 enzymes ("motors") a lot energy from the high-energy compound as ATP and also magnesium. This is very hard work for liver. If the consumption of protein is considerable, the liver is more over loaded.
Therefore, consumption of proteins should be low but they should be of high biological value. The liver doesn't like sugar (carbohydrates), not when the consumption of carbohydrates is substantial and not when consumption is very low but when the consumption is average. The liver doesn't most like when in the diet the energy from carbohydrates is kept in the limit of 35 - 40%.
When carbohydrates are main sources of energy for a man, the liver is charged a little. Production of the glucose and glycogen from carbohydrates is very simple for the liver.
The body knows that fat is 40 times better than glucose ( for this amount the free fatty acid is quicker absorbed in the blood than glucose) and never discharges fat and if has to glucose is discharged instead.
When 35 - 40% of energy is obtained from carbohydrates, the liver must transform most of the carbohydrates into fat and mainly into triglycerides and cholesterol. When the consumption of sugar and proteins are low (average about 50g using optimal diet and 25 - 40g proteins) the liver is healthy. An owner of this liver is also healthy and he is not ill on any bacterial or virus diseases. In principle without exception, people who observe the optimal diet for few years do not become ill on any flu, cold or other infection diseases.

Dr Jan Kwasniewski