Mastoidectomy is a surgical procedure that removes part or all of the glandular tissue from the upper portion of your stomach (mammary glands) which produces milk for nourishment. A mastoidectomy may be required if you have a condition called lactose intolerance. Mastoids are located just above your liver and pancreas. They produce mucus, which helps keep these organs healthy.

The mastoid glands are located on either side of the small intestine. Milk production occurs when the hormones secreted by these glands stimulate the mammary ducts to contract and empty their contents into your digestive tract. If you cannot digest milk products, then you will not get enough nutrition from them.

Lactose intolerance is a common problem among children and adults alike, but it can also affect those with other food allergies such as asthma or hay fever.

Lactose intolerance is a disease characterized by symptoms like diarrhea, gas, bloating, cramps and nausea. Symptoms usually begin within hours of eating dairy products containing lactose. These include yogurt, cheese, ice cream and milk tea.

Other foods that contain lactose include cottage cheese and sour cream. People with lactose intolerance typically do not experience any negative effects from consuming milk products containing less than 1% of the sugar found in table sugar (table sugar).

Prevalence of lactose intolerance is around 75% on a global scale. It is more common among people of Asian and Native American decent, as well as most black people. This is due to the fact that their ancestors had a genetic mutation which stopped them from being able to properly digest milk.

In the US alone it is believed that around 50 million people suffer from some form of the condition.

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