What to Know About the New Cholesterol Guidelines

America's leading heart organizations have released their first major update to cholesterol guidance since 2018. Some of the changes may affect which tests you get and what numbers your doctor aims for. Here's what's new and what it means for you.

Why Your Cholesterol Numbers Matter

Heart disease is still the leading cause of death in the United States, and LDL cholesterol (the “bad” cholesterol) is one of the biggest risk factors you can actually change. The more LDL in your blood, and the more years your arteries are exposed to it, the higher your risk of heart attack and stroke.

Many of you also get an annual health check here in Japan that reports your cholesterol, sometimes with flags that don't line up with what you'd hear from a US doctor. So when the major US heart organizations update their guidance, it's worth knowing what changed and how to read your own results.

What the New Guideline Covers

Earlier this year, the American College of Cardiology and the American Heart Association, together with several partner medical societies, released a new guideline on managing blood cholesterol (the clinical term is dyslipidemia). It's the first full update since 2018 and draws on nearly a decade of new research, including newer cholesterol-lowering medications and better tools for estimating risk.

A recent JAMA report by Jennifer Abbasi walked through the biggest changes. Here's our plain-English summary.

What's Different This Time

A few changes stand out for everyday patients:

• LDL targets are back. The 2018 guideline focused mostly on lowering LDL by a percentage. The new guideline returns to specific numeric goals, with lower targets for people at higher risk. For example, people who already have heart disease or are at very high risk are generally aimed well below 70 mg/dL, and in some cases below 55 mg/dL.
• A new risk calculator. Doctors are now encouraged to use the PREVENT calculator, which factors in things like kidney function and can estimate your 30-year risk, not just your 10-year risk. That helps catch younger adults whose risk is building quietly.
• More treatment options. When a statin alone doesn't get LDL to goal, the guideline gives clearer direction on adding other medications, such as ezetimibe or the newer injectable cholesterol-lowering drugs.

New Tests Worth Knowing About

• Lipoprotein(a), or Lp(a). The guideline recommends checking Lp(a) at least once in every adult's lifetime. Lp(a) is a largely inherited type of cholesterol particle that raises heart risk, and roughly 1 in 5 people have elevated levels without knowing it. It isn't part of a standard cholesterol panel or a typical Japanese health check.
• Apolipoprotein B, or apoB. This test counts the actual number of artery-clogging particles in your blood. It can be especially helpful for people with high triglycerides, diabetes, or excess weight, where LDL alone may underestimate risk.
• Coronary artery calcium (CAC) scan. A quick, low-dose CT scan that looks for calcium in the heart arteries. It's useful when it's unclear whether someone would benefit from medication.

A Few Things Worth Keeping in Mind

• Guidelines are a framework, not a prescription. Your doctor will weigh your full health picture, family history, and preferences, not just one number.
• A high Lp(a) result doesn't come with a dedicated pill yet. There's currently no approved medication that specifically targets it. What it does change is how aggressively we manage your other risk factors, like LDL and blood pressure.
• Japanese and US targets don't always match. Japan's own cholesterol guidelines use somewhat different cut points, so a result flagged on your health check may be read differently by a US-trained physician, and vice versa.
• Coverage for newer tests varies. Lp(a), apoB, and CAC scans aren't always covered the same way by every plan, so it's worth checking before you test.

What You Can Actually Do

• Know your LDL number, not just your total cholesterol. LDL is the number the new targets are built around.
• Ask about a one-time Lp(a) test. If you've never had it checked, especially with a family history of early heart attack or stroke, this is an easy conversation to start.
• Bring your Japanese health check results. Japan reports cholesterol in mg/dL, the same units used in the US, so we can compare your numbers directly against the new targets.
• Ask for your long-term risk, not just your 10-year risk. The 30-year estimate can be eye-opening for adults in their 30s and 40s.
• Don't stop a statin on your own. If you're having side effects like muscle aches, talk with us first. A different dose, a different statin, or an add-on medication often solves the problem.
• Keep the foundation strong. Regular activity, not smoking, and a diet built on fish, soy, vegetables, and whole grains (a lot of what traditional Japanese cooking already does well) still matter at every risk level.

If it's been a while since your last cholesterol check, or you've never had your Lp(a) tested, now is a great time to come in. We'll go over your numbers together.

Partnering in your care,

Dr. Kenji Taylor, MD

Torii Health & Iris Dental and Medical