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Porphyrias are a group of genetic disorders caused by problems with how your body makes a substance called heme. Heme is found

A peptic ulcer is a sore in the lining of your stomach or your duodenum, the first part of your small intestine.

Most people have four pea-sized glands, called parathyroid glands, on the thyroid gland in the neck. Though their names are similar, the

The pancreas is a large gland behind the stomach and close to the first part of the small intestine. It secretes digestive

Overactive bladder is a condition in which the bladder squeezes urine out at the wrong time. You may have overactive bladder if

An ostomy is surgery to create an opening (stoma) from an area inside the body to the outside. It treats certain diseases

Obesity means having too much body fat. It is different from being overweight, which means weighing too much. Both terms mean that

Good nutrition is important in keeping people healthy throughout their lives – when they are babies, toddlers, children, adults, and then older

Metabolism is the process your body uses to get or make energy from the food you eat. Food is made up of

Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. You cannot

What is cholesterol? Cholesterol is a waxy, fat-like substance that’s found in all the cells in your body. Your liver makes cholesterol,

Lactose intolerance means that you cannot digest foods with lactose in them. Lactose is the sugar found in milk and foods made