Smalets contains many useful substances:
Vitamin B4 prevents the appearance of sclerosis and improves heart function
Vitamin E strengthens the walls of capillaries and blood vessels,
Vitamin D slows down the growth of cancer cells 
Selenium protects the tissues of the eye from free radicals, participates in the process of cell growth.
Zinc improves the supply of oxygen to the retina, helps to improve the structure of the optic nerve.