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Cholesterol often wrong target in heart disease risk

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Everyone has heard that high cholesterol is bad for heart health. But as it turns out, the association between cholesterol and cardiovascular disease has been somewhat misrepresented. Doctors are starting to accept that cholesterol levels do not necessarily predict risk for heart disease as much as we thought. Consider the following:

  • 75 percent of  people  who have heart attacks have normal cholesterol.
  • Older  patients  with lower cholesterol have a higher risk of death than those with higher cholesterol.
  • Countries with higher average cholesterol than Americans such as the Swiss or Spanish have less heart disease.
  • Recent evidence shows that it is likely statins' ability to lower inflammation that accounts for the benefits of statins, not their ability to lower cholesterol.

We need cholesterol!

Cholesterol is a fat-like substance found in every cell in the human body. The liver makes 75 percent of cholesterol. Cholesterol helps produce cell membranes, vitamin D, and vital hormones, and is needed for neurological function. Put bluntly, we would die without it.

The cholesterol players

When we measure cholesterol levels, we are actually measuring the lipoproteins LDL and HDL. We refer to them as cholesterol, but they are actually small packages of fat and protein that help move cholesterol throughout the body.

High-density lipoprotein — HDL

This is considered "good" cholesterol. It helps keep cholesterol away from your arteries and removes excess arterial plaque.

Low-density lipoprotein — LDL

This is considered "bad" cholesterol. It can build up in the arteries, forming plaque that narrows the arteries and makes them less flexible (atherosclerosis).

Also important are:

Triglycerides

Elevated levels of this dangerous fat have been linked to heart disease and diabetes. Levels rise from eating too many sugars and grains, smoking, being physically inactive, excessive drinking and being overweight.

Lipoprotein (a) or Lp(a)

Lp(a) is made up of an LDL part plus a protein (apoprotein a). Elevated Lp(a) levels are a very strong risk for heart disease.

When testing cholesterol, total cholesterol is not as important as:

  • Levels of HDL "good" cholesterol versus LDL "bad" cholesterol
  • Triglyceride levels
  • The ratio of triglycerides to HDL
  • The ratio of total cholesterol to HDL

In order for cholesterol to cause disease, it has to damage the arterial walls. There are small and large particles of LDL, HDL, and triglycerides. Large particles are practically harmless, while small, dense particles are the dangerous ones, lodging in the arterial walls, causing damage and inflammation. The resulting "scar" is called plaque. Repeated trauma causes a buildup of plaque and chronic inflammation while your risk of high blood pressure and heart attack increases.

The biggest culprits in high cholesterol? Sugar and bad fats!

Although we've been taught that a high-fat diet causes problems with cholesterol, the type of fat you eat is more important than the quantity. Trans fats, or hydrogenated and saturated fats, promote abnormal cholesterol, while omega-3 fats and monounsaturated fats actually improve the type of cholesterol in our bodies. Eat your good fats, your body needs them!

The surprise: the biggest source of abnormal cholesterol isn't dietary fat, but  sugar. Sugar (and refined carbs, including processed white foods), drives good cholesterol down and triglycerides up. It causes those small particles, encouraging dangerous plaque buildup, and can lead to heart disease and metabolic syndrome or "pre-diabetes." Doctors are starting to admit that sugar, not dietary fat, is the bigger cause of most heart attacks.

So, the real concern isn’t really the amount of total cholesterol you have, but the type of fats, sugar, and refined carbohydrates in your diet that lead to abnormal cholesterol production.

Inflammation promotes heart disease

Systemic  inflammation  plays a key role in heart disease and, in fact, most all chronic illnesses. Systemic inflammation can arise from poor diet, a sedentary lifestyle, stress, allergies, and more. Research at Harvard has shown that people with high levels of systemic inflammation (measured by a test called C-reactive protein, or CRP) had higher risk for heart disease than those with high cholesterol, while normal cholesterol was not protective to those with high CRP.

Clearly, multiple factors come together to determine your risk for heart disease, including diet, lifestyle, and environment. If you are concerned about your heart health, contact my office for a comprehensive evaluation to help reveal the factors that may increase your risk for heart disease.

Meet the Author

Dr. Matz DC

Dr. Boyle D.A.C.M., LAc., DiplOM. is the founder of the Holistic Wellness Center of the Carolinas where he is the Director of Functional Medicine. He holds a Diplomate in Oriental Medicine and is acupuncture physician and primary care physician in the state of Florida. His post-graduate focus has been in the fields of functional neurology, functional immunology, and functional endocrinology.

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