This is possible if the omelette has been cooked using unhealthy fat e.g. if you are eating in a restaurant that has cooked its vegetables using bacon fat. You will also have to consider the eggs size. Small eggs will contain about 54 Calories whereas jumbo eggs will contain about 90 calories.
The kidneys and liver can make hormones that stimulate other organs. When sunlight strikes the skin, the skin makes a chemical that the liver changes into a form of vitamin D. This vitamin D moves from the liver to the kidneys courtesy of the bloodstream. In the kidneys it becomes a hormone called calcitriol.
How do the kidneys and urinary system work? The body takes nutrients from food and converts them to energy. After the body has taken the food components that it needs, waste products are left behind in the bowel and in the blood. The kidney and urinary systems help the body to eliminate liquid waste called urea, and to keep chemicals, such as potassium and sodium, and water in balance. Urea is produced when foods containing protein, such as meat, poultry, and certain vegetables, are broken down in the body.