High cholesterol is sneaky. Like high blood pressure, it usually has no symptoms, which is why nearly 40% of U.S. adults don’t know they have it. Left untreated, it can quietly raise your risk of heart attack, stroke, chest pain, and peripheral artery disease.

How do you catch something you can’t feel? Know your numbers.

According to preventive cardiologists at places like Johns Hopkins Medicine, routine blood work is the most reliable way to spot high cholesterol early. Numbers matter but doctors also look at your overall cardiovascular risk, not just a single test result.

Your annual lipid panel measures:

• HDL (“good” cholesterol): Helps remove excess cholesterol. Aim for 60+ mg/dL

• LDL (“bad” cholesterol): Causes plaque buildup in arteries. Aim for under 100 mg/dL

• Triglycerides: A common blood fat. Aim for under 150 mg/dL

• Total cholesterol: A snapshot of all cholesterol in your blood

What cholesterol really is (and why you need it). Cholesterol isn’t the villain it’s made out to be. Your body needs it to:

• Build cells

• Produce hormones

• Make vitamin D

• Help digest fats

Problems start when too much LDL circulates in your blood. It sticks to artery walls, forming plaque that narrows and stiffens arteries (atherosclerosis), increasing the risk of heart attack or stroke—and not just in the heart, but throughout the body.

Experts at Cleveland Clinic warn that many people with inherited high cholesterol are never diagnosed, even though levels are elevated from birth. High cholesterol also raises the risk of strokes, mini-strokes, vascular dementia, and circulation problems in the legs. How to know if you are at risk:

• Poor diet, inactivity, smoking, or excess alcohol

• Aging (your liver clears LDL less efficiently)

• Conditions like diabetes or kidney disease

• Family history of high cholesterol or early heart disease

If that’s not enough, medications may be added. While statins are still common, newer options now exist, and combination treatments are increasingly used. Prevention is powerful. When treating high cholesterol, doctors usually start with lifestyle changes:

• Heart-healthy eating

• Regular exercise

• Weight loss (even 5–10% helps)

A major study in The New England Journal of Medicine found that people at high genetic risk cut their heart disease risk nearly in half by maintaining a healthy lifestyle. The American Heart Association recommends:

• Limiting saturated fat

• Avoiding trans fats

• Getting 150 minutes of moderate exercise weekly

• Quitting smoking or vaping

Bottom line: Don’t wait for symptoms because symptoms often mean damage is already done. A simple blood test, smart lifestyle choices, and early action can protect your heart for decades to come.