A person has metabolic syndrome when they have a combination of three or more certain health risks. These health risks include:
- high blood pressure
- high blood sugar levels
- excess body weight
- low levels of “good” cholesterol (HDL)
- high levels of triglycerides (a type of fat found in the blood)
Each of these factors alone can increase a person’s risk of developing diabetes, heart disease and stroke. However, the risk is much higher when these factors are found in combination.
Approximately one-quarter of Americans have this condition, although the rate is higher for certain groups of people. For example, people of American Indian and South Asian descent have higher rates of metabolic syndrome than Caucasians.
Other major risk factors that may lead to the development of metabolic syndrome include:
- age (the risk of metabolic syndrome increases as you get older)
- a family history of type 2 diabetes
- other medical conditions including high blood pressure, heart or blood vessel disease, and polycystic ovarian syndrome (a condition where a woman’s body produces too much male hormones)
Metabolic syndrome is believed to develop due to insulin resistance. Insulin is a hormone that is produced by the pancreas (an organ located near the stomach). It helps blood sugar enter cells, where it is used for energy. With insulin resistance, the body fails to recognize the insulin that is produced, causing the sugar to accumulate in the blood instead of being absorbed into other cells. Because blood sugar levels remain high, the pancreas keeps producing more and more insulin, leading to high insulin levels. While blood sugar levels are not high enough to be classified as diabetes, they do increase the risk of developing serious health problems.
Scientists are not certain why insulin resistance develops but they believe it may be partly inherited. They do know, however, that being overweight and inactive contributes to the development of metabolic syndrome.
Symptoms and Complications
In general, few people have any noticeable signs or symptoms. However, the main characteristics of metabolic syndrome are:
- excess body weight (usually around the stomach)
- high blood pressure
- low level of “good” cholesterol in the blood
- high level of triglycerides (fats) in the blood
- resistance to insulin (high blood sugar)
Although you may not notice any changes in the way you feel, having metabolic syndrome dramatically increases the risk of serious health problems including diabetes, heart disease, and stroke. In fact, the more health risks you have, the more likely you are to develop these conditions.
Making the Diagnosis
In order to diagnose your condition, your doctor will likely ask about your medical history, perform a physical examination, and analyze your blood.
If you have 3 out of 5 of the following health risks, it is likely that you have metabolic syndrome:
- excess body weight (waist circumference greater than 40 inches (102 cm) for men and greater than 35 inches (88 cm) for women
- high blood pressure – 130/85 mm Hg or higher
- high levels of triglycerides (blood fats) – 150 mg/dL (1.7 mmol/L) or higher
- low levels of “good” cholesterol (HDL) – less than 40 mg/dL (1 mmol/L) for men and less than 50 mg/dL (1.3 mmol/L) for women
- high levels of fasting blood sugar (glucose) – 100 mg/dL (5.6 mmol/L) or higher
Treatment and Prevention
The goal of treating metabolic syndrome is to prevent the development of diabetes, heart disease, and stroke. Your doctor will first suggest lifestyle modifications such as exercising for 30 minutes most days of the week. One study showed that individuals who are physically active (30 minutes of activity at least once per week) have half the risk of developing metabolic syndrome than those who are inactive. Your doctor may also suggest eating a healthy diet to promote weight loss and normal blood cholesterol and fat levels.
Seeing your doctor for routine checkups and checking your blood glucose levels, blood pressure, blood cholesterol, and weight will help you monitor your health.
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