A total cholesterol level of 5.7 mmol/L (about 222 mg/dL) is above the recommended healthy range. Both the NHS and the British Heart Foundation set the desirable level for healthy adults below 5.0 mmol/L, which means 5.7 sits roughly 14% above that threshold. It’s not dramatically high, but it’s high enough to warrant attention and, depending on your other risk factors, possible action.
What 5.7 mmol/L Actually Means
Total cholesterol is the sum of several types of cholesterol circulating in your blood: LDL (often called “bad” cholesterol), HDL (“good” cholesterol), and a portion of your triglycerides. A reading of 5.7 tells you the overall number is elevated, but it doesn’t tell you the full story. Two people can both have a total cholesterol of 5.7 and face very different levels of risk depending on how that number breaks down.
For example, if your HDL is high (above 1.2 mmol/L for women, above 1.0 mmol/L for men), it’s doing a good job of clearing cholesterol from your arteries. A 5.7 total with strong HDL is a different situation from 5.7 with low HDL and high LDL. This is why doctors increasingly focus on non-HDL cholesterol, which is simply your total cholesterol minus your HDL. The healthy target for non-HDL cholesterol is below 4.0 mmol/L.
If you’ve already had a heart attack or stroke, the target is considerably tighter. The British Heart Foundation recommends a total cholesterol below 4.0 mmol/L for people with existing cardiovascular disease, making 5.7 significantly above goal in that context.
Why Total Cholesterol Alone Isn’t Enough
Modern cardiovascular guidelines have shifted away from treating total cholesterol as the primary number to manage. The focus now is on LDL cholesterol and your overall 10-year risk of a cardiovascular event. That risk calculation factors in your age, blood pressure, smoking status, whether you have diabetes, and your cholesterol breakdown, not just one number on a lab report.
Under the latest American College of Cardiology and American Heart Association guidelines, adults aged 30 to 79 are sorted into risk categories: low (under 3%), borderline (3% to under 5%), intermediate (5% to under 10%), and high (10% or above). Where you land on that scale matters far more than whether your total cholesterol crosses a single threshold. Someone at low risk with a total cholesterol of 5.7 may only need lifestyle changes. Someone at intermediate or high risk with the same number may benefit from medication.
So when you look at your results, ask about your LDL, your HDL, and your non-HDL cholesterol individually. These give a much clearer picture than the total alone.
What Drives Cholesterol to 5.7
Cholesterol levels reflect a combination of genetics and lifestyle. Your liver produces most of the cholesterol in your body, and some people are genetically wired to produce more. If close relatives have high cholesterol or early heart disease, your 5.7 may be partly inherited.
On the lifestyle side, diets high in saturated fat (fatty cuts of meat, full-fat dairy, butter, pastries) raise LDL cholesterol most consistently. Lack of physical activity, carrying excess weight around the midsection, and smoking all push the numbers in the wrong direction. Smoking doesn’t raise LDL directly, but it lowers HDL, which shifts the overall balance toward higher risk. Age also plays a role: cholesterol levels tend to rise naturally through middle age.
How Much Lifestyle Changes Can Lower It
For a level of 5.7, lifestyle changes alone can often bring you back below 5.0, especially if diet is a major contributor. The numbers are encouraging. Cutting saturated fat to less than 7% of your daily calories can reduce LDL cholesterol by 8% to 10%. Adding plant sterols (found in fortified spreads, nuts, and seeds) at about 2 grams per day can lower LDL by another 5% to 15%. These effects stack, meaning combining several dietary shifts produces a bigger drop than any single change.
Regular aerobic exercise, even moderate activity like brisk walking for 30 minutes most days, reliably raises HDL while modestly lowering LDL. Losing excess weight has a similar dual benefit. Research from the American Heart Association suggests that adopting a comprehensive healthy lifestyle can reduce cardiovascular risk by roughly 50%, even in people with a genetic predisposition to heart disease. That’s a striking number, and it applies to people in exactly the range you’re in.
Practical changes that tend to have the biggest impact include swapping butter for olive oil, eating oily fish twice a week, increasing soluble fiber from oats and beans, and reducing processed foods high in saturated and trans fats.
When Medication Enters the Picture
Whether a cholesterol of 5.7 leads to a prescription depends almost entirely on your broader risk profile. For someone at low 10-year cardiovascular risk with an LDL below about 4.1 mmol/L and a 30-year risk under 10%, the recommendation is lifestyle counseling rather than medication. For someone at intermediate risk (5% to 10% over 10 years), guidelines recommend at least a moderate-intensity statin to bring LDL down by 30% to 49%. At high risk (10% or above), more aggressive treatment is standard.
The decision isn’t purely about the cholesterol number on your lab report. It’s about what that number means alongside everything else going on in your body. A 42-year-old nonsmoker with normal blood pressure and a total cholesterol of 5.7 is in a very different position from a 58-year-old smoker with the same reading and borderline diabetes.
What to Look at on Your Results
When you get a cholesterol test, you’ll typically see four or five numbers. Here’s what healthy ranges look like for adults:
- Total cholesterol: below 5.0 mmol/L
- HDL cholesterol: above 1.0 mmol/L for men, above 1.2 mmol/L for women (higher is better)
- Non-HDL cholesterol: below 4.0 mmol/L
- LDL cholesterol: below 2.6 mmol/L (about 100 mg/dL) for most adults, lower if you have existing heart disease
Your total of 5.7 is above the general guideline, but the numbers that matter most for treatment decisions are your LDL and non-HDL. If your HDL is robust and your LDL is only mildly elevated, dietary changes and exercise may be all you need to bring things into a healthier range. If your LDL is the primary driver of that 5.7, the conversation may move toward medication sooner, particularly if you have other risk factors working against you.