A Cardiologist Explains What People Get Wrong About High Cholesterol

Dr. Oliver Guttmann has learned to expect the shocked look. A consultant cardiologist at The Wellington Hospital, he regularly sits across from patients who look the picture of health, only to hear that their LDL, or “bad” cholesterol, is dangerously high. It’s a moment that catches people off guard, because high cholesterol rarely announces itself. There are no symptoms to warn you, which is exactly why so many misconceptions about it have taken hold.

Dr. Guttmann says one of the most persistent misconceptions is that a slim build or a regular gym habit protects against high cholesterol. “Some people exercise every day,” he says, “but they eat unhealthy things like takeaways, fried foods, cheese, pastries, butter and processed meats.” Cholesterol depends on liver function, diet, and family history, not just calorie intake. A person can stay slim while eating foods loaded with saturated fat, which drives LDL upward.

The CDC notes cholesterol itself is not inherently harmful; the body needs it to build cells and produce hormones, and it travels through the bloodstream on proteins called lipoproteins. HDL carries excess cholesterol back to the liver to be cleared, while LDL can deposit into artery walls and form plaque. Over time, that buildup narrows blood vessels and restricts circulation, which can trigger angina, a heart attack, or a stroke.

Why One Test Isn’t the Whole Story

A normal total cholesterol reading does not guarantee good heart health. Total cholesterol combines HDL, LDL, non-HDL, and triglycerides, each playing a different role. Dr. Guttmann says LDL matters most, since it drives plaque buildup in the coronary arteries. He also stresses the ratio between LDL and HDL, not just individual numbers. Someone with a normal total score can still have high LDL paired with low HDL, a combination that raises real concern.

Getting a clear cholesterol result years ago does not mean current levels are still fine. Menopause, shifts in diet, and simple aging can all move the numbers over time. Dr. Guttmann notes that treatment guidelines have grown more cautious as understanding improves. Doctors once started statins only when a patient’s 10-year risk score topped 20 percent; the threshold now sits at 10 percent, reflecting a more proactive approach to prevention.

The CDC confirms there are typically no warning signs at all, though some people eventually develop xanthomas, yellowish cholesterol deposits that can appear on the skin. Because symptoms are so rare until damage has already occurred, the CDC recommends adults get their cholesterol checked at least every five years unless a doctor advises otherwise. Catching an imbalance early gives far more room to adjust diet, activity, or medication before arteries sustain lasting damage.

Genetics, Hormones, and What Your Numbers Really Mean

Familial hypercholesterolemia, an inherited condition causing extremely high LDL from birth, affects roughly one in 250 to one in 500 people, yet fewer than one in 10 UK cases are identified. Dr. Guttmann recently treated a 36-year-old woman who suffered a heart attack; her mother had needed a heart bypass at the same age. The CDC notes that a family history of high cholesterol raises the odds of this inherited condition, making early testing worthwhile.

Hormonal shifts hit women especially hard. Dr. Guttmann explains that LDL levels rise by roughly 23 percent after menopause, since hormones had been offering some protection beforehand. That helps explain why women tend to have heart attacks later in life than men on average. Once hormone levels change, lipid profiles and cardiovascular risk shift along with them, making post-menopausal screening particularly important even for women with previously normal results.

Very high HDL, usually seen as the “good” cholesterol, isn’t automatically reassuring, according to Dr. Guttmann. He says he can hardly recall warning a patient that their levels were too high. Occasionally, such spikes mean the HDL has become dysfunctional and stopped clearing cholesterol effectively. For most people, raising HDL and lowering LDL remains the right goal, and the “good” and “bad” labels still hold up as useful shorthand even as researchers refine the fuller picture.

Diet, Medication, and What Actually Works

Eggs carry an outsized reputation for raising cholesterol, but Dr. Guttmann says the real culprit is saturated fat, not the dietary cholesterol found in yolks. Research shows dietary cholesterol has a smaller effect on blood cholesterol than once assumed. One study even found that eating one to six eggs weekly was linked to a lower risk of cardiovascular death later in life, provided the rest of the diet stays low in saturated fat.

Starting statins is not a license to eat freely. Dr. Guttmann says the medication changes a patient’s lipid profile, but cannot cancel out an unhealthy diet layered on top of it. Some patients try to fix high cholesterol through diet alone; he typically gives them three to six months before reassessing. Even committed patients who exercise and eat well can still carry high cholesterol due to genetics, meaning statins remain necessary despite the effort.

For the CDC, cholesterol management is a mix of habits and, when needed, medication. This includes eating fewer saturated fats, favoring fiber-rich foods, staying active, avoiding tobacco, and getting tested at least every 5 years. People with familial hypercholesterolemia, existing cardiovascular disease, or diabetes may need statins regardless of lifestyle. Dr. Guttmann adds that patients on medication still benefit from managing weight, sleep, and stress, since no single fix replaces long-term attention to heart health.