What Your Cholesterol Panel Isn't Telling You: New Heart Health Tests You Should Know About
If your doctor tells you your cholesterol looks "good," you might assume your heart is safe. But groundbreaking new guidelines released in March 2026 by the American College of Cardiology (ACC) and the American Heart Association (AHA) are changing what "good" means — and they're introducing tests that most patients have never heard of.
We want to break down what these new guidelines mean for you.
The old way of checking your heart risk
For decades, heart disease risk was assessed primarily through your standard cholesterol panel: total cholesterol, LDL ("bad" cholesterol), HDL ("good" cholesterol), and triglycerides. While these numbers still matter, we now know they don't tell the whole story.
As the lead researcher behind the new guidelines put it: having healthy LDL or HDL cholesterol isn't necessarily a "get out of jail free" card. There are people with normal cholesterol who have significant hidden cardiovascular risk — and these new tests can find it.
What's new: the tests your doctor may now recommend
1. Lp(a) — the once-in-a-lifetime test everyone should have
Lipoprotein(a), or Lp(a), is a type of cholesterol particle that is almost entirely determined by your genetics. The new guidelines recommend that every adult have their Lp(a) measured at least once in their lifetime.
Why it matters: A high Lp(a) — defined as 125 nmol/L or higher — is associated with a roughly 1.4-fold increased long-term risk of heart attack or stroke. At 250 nmol/L or higher, that risk at least doubles. Unlike LDL cholesterol, Lp(a) doesn't respond much to diet or exercise — it's largely genetic. Knowing your number helps your doctor understand your true baseline risk and decide if more aggressive treatment is needed.
The good news: because Lp(a) is genetically stable, you only need to test it once. If your number is normal, you don't need to repeat it. If it's elevated, it helps us tailor your treatment plan.
2. ApoB — a more precise picture of your risk
Apolipoprotein B (ApoB) is a protein found on every harmful cholesterol particle in your blood. While LDL measures the amount of cholesterol, ApoB counts the actual number of dangerous particles — which can be a more accurate risk marker, especially for people with diabetes, high triglycerides, or metabolic syndrome.
Who needs ApoB testing?The new guidelines recommend ApoB testing for patients who have already met their LDL and non-HDL cholesterol goals but may still have residual risk — particularly those with elevated triglycerides, type 2 diabetes, or cardiovascular-kidney-metabolic syndrome. Think of it as a second layer of reassurance, or a reason to intensify treatment when standard cholesterol numbers look acceptable but the full picture isn't clear.
3. CAC score — the tiebreaker test
A Coronary Artery Calcium (CAC) scan is a quick, non-invasive CT scan that measures calcium deposits in the walls of your coronary arteries. Calcium in the arteries is a sign of plaque buildup — atherosclerosis — even before any symptoms appear.
The new guidelines give CAC scoring a strong recommendation (Class 1) for men over 40 and women over 45 who are at borderline or intermediate risk for heart attack or stroke, when there is uncertainty about whether to start statin therapy.
How to interpret your score:A CAC score of zero means no visible calcium — and is associated with very low near-term cardiovascular risk. Any score above zero supports a goal of keeping LDL below 100 mg/dL. A score of 100 or higher is a clear signal to start treatment and aim for LDL below 70 mg/dL. Think of CAC scoring as the best "tiebreaker" when the decision to start cholesterol medication isn't clear-cut.
4. CT coronary angiography — seeing plaque directly
For select patients — particularly those with symptoms or specific risk factors — a CT coronary angiography (CTA) can actually visualize coronary artery plaque directly. This is a step beyond CAC scoring, providing more detailed information about whether plaque is present and how significant it is. Your doctor will determine if this level of imaging is appropriate for your situation.
New cholesterol targets — lower is better
The 2026 guidelines also bring back specific LDL targets, which were removed from earlier guidelines. Here's what they now recommend:
Borderline or intermediate risk (no prior heart attack or stroke): LDL goal below 100 mg/dL
High risk: LDL goal below 70 mg/dL
Very high risk (prior heart attack, stroke, or multiple risk factors): LDL goal below 55 mg/dL
What this means for you
These new guidelines are a significant step forward in personalized preventive cardiology. Not every patient needs every test — but many people who have been told their cholesterol is "fine" may benefit from a more complete picture.
At Plasencia Family Medicine, we use the new ACC/AHA framework — what the guidelines call the CPR model: Calculate your 10-year risk, Personalize it to your unique situation, and Reclassify with targeted testing like Lp(a), ApoB, or CAC when needed. This is exactly the kind of proactive, individualized care we believe every patient deserves.
This blog is written to educate and inform — not to replace the personalized care of your physician. Every patient is different, and what's right for one person may not be right for another. Please talk to Dr. Daly, Dr. Plasencia, or your own healthcare provider before making any medical decisions based on what you read here.
Have questions about your cholesterol numbers or whether you need an Lp(a) or CAC score? Call us at (989) 791-3401 or schedule an appointment on MyChart. We're accepting new patients and would love to help you understand your heart health from the inside out.