You go for your annual check-up. The doctor checks your cholesterol, your blood pressure, maybe your blood sugar. Everything comes back 'normal'. You leave feeling reassured. Six months later you have a heart attack. This is not a hypothetical. It happens every day.
The standard blood panel most GPs run is a legacy system. It was designed decades ago, when we understood far less about cardiovascular disease. It catches some things. It misses others. And the thing it most consistently misses is the one that matters most for men over 40.
THE MARKER: TRIGLYCERIDE-TO-HDL RATIO
Your doctor almost certainly checks your total cholesterol and your LDL. But the number with the strongest predictive power for insulin resistance — the root cause of most metabolic disease — is your triglyceride-to-HDL ratio. You calculate it by dividing your triglycerides by your HDL cholesterol. A ratio below 1.5 is good. Above 3.0 is a serious warning sign. Above 5.0 means you are in trouble.
"A normal LDL with a high triglyceride-to-HDL ratio is not a clean bill of health. It is a missed diagnosis."
Why this ratio matters
High triglycerides combined with low HDL is the signature pattern of insulin resistance. Your cells have stopped responding efficiently to insulin, so your liver compensates by pumping out more triglycerides. Your HDL drops because it's being consumed faster than it's being produced. This pattern predicts cardiovascular disease more accurately than LDL alone in most studies of middle-aged men.
THREE OTHER MARKERS WORTH REQUESTING
- Fasting insulin. Your fasting glucose can look normal for years while your insulin is sky-high — your pancreas working overtime to compensate. Fasting insulin catches insulin resistance a decade before glucose does.
- HbA1c. A three-month average of your blood sugar levels. More useful than a single fasting glucose reading because it can't be gamed by a good day.
- hsCRP (high-sensitivity C-reactive protein). A marker of systemic inflammation. Elevated hsCRP is independently associated with heart attack risk, separate from cholesterol.
- Testosterone (total and free). Chronically low testosterone in men over 40 is associated with fatigue, fat gain, muscle loss, and depression — and it's almost never checked unless you specifically ask.
WHAT TO DO WITH THIS
At your next appointment, ask your GP to add fasting insulin, HbA1c, hsCRP, and a full lipid panel (not just total cholesterol) to your blood request. Most will agree. If yours won't, private testing for all four markers costs less than £100 in the UK.
The numbers are only useful if you act on them. But you can't act on numbers you don't have. Get the full picture. Most of the men I work with are shocked by what they find when they look properly.