The cholesterol story you've been told is outdated
Maybe you've heard that not all cholesterol is bad. If you've had your blood checked recently, your doctor probably praised your HDL cholesterol and warned you about your LDL. HDL, high-density lipoprotein, is the "good" one; LDL, low-density lipoprotein, is the "bad" one. A lipoprotein is just a bundle of protein and cholesterol that travels through your bloodstream. Here’s what the doctors suggest: Raise the good, lower the bad. Simple, right?
Well, yes. It's simple. And it's wrong.
Our ideas about "good" and "bad" cholesterol need a serious upgrade. Take HDL, for instance. A major 2011 study found that raising HDL levels does nothing to reduce your chances of a heart attack, a stroke, or death. So much for "more is always better." And lowering LDL isn't the clean win it's made out to be either, because focusing on the total amount of HDL and LDL misses the more important question: what kind of cholesterol is actually in your blood. Some "good" HDL can be harmful. Some "bad" LDL can be harmless. The type matters more than the label.
In fact, doctors now have a better way to measure your risk than sorting cholesterol into buckets at all. Instead of totaling up HDL and LDL, they can count the actual number of artery-clogging particles floating in your bloodstream. Studies comparing this particle count to the old HDL/LDL numbers, across hundreds of thousands of people, keep finding the same thing: the count predicts heart disease better than the old labels ever did. The good-versus-bad framework isn't just oversimplified — it's already being quietly replaced.
Which brings us to saturated fat, the bogeyman of cardiovascular health. Found in meat, dairy, eggs, along with coconut and palm oils, "artery-clogging saturated fat" has become the default label for all of such fat. There must be a good reason for that reputation, right?
Once again, the science says: not really. The claim that saturated fat clogs your arteries has never been fully proven. It rests on the assumption that LDL is always bad — an assumption we've just seen doesn't hold up. In truth, saturated fat can improve the composition of your cholesterol: it tends to lower the hard, dense particles that seem to matter most and raise the larger, more protective ones. That confuses anyone still thinking in terms of "good" HDL and "bad" LDL, since saturated fat does raise total LDL — which should, by the old logic, mean more heart disease. But a major analysis pooling data on more than 300,000 people tested that exact hypothesis and found no link between saturated fat intake and cardiovascular disease.
Of course, none of this means saturated fat gets an unconditional pass. Moderation is key. What you eat instead matters just as much as the fat itself. Swap your excess butter for sugar and white bread, and you haven't done your heart any favors. Swap it for olive oil, nuts, or fish, and the benefit is real and consistent.
The upshot: "good" and "bad" cholesterol was always a story simple enough to fit on a lab report, and that's exactly why it was never quite true. Your heart doesn't care about labels. It cares about particles, proportions, and what's actually on your plate.
Thank you for reading/listening. My work across personal development, success, philosophy, health, personal finance, and spirituality is completely open-source and free from corporate ads. If these insights brought value to your life today, please consider supporting the platform:
- ☕ Buy Me a Coffee (For a quick, one-time gesture of appreciation)
- 🌱 Become a Sustaining Patron (To join my monthly supporting circle on Ghost)
