You’ve had a blood test. Your GP has mentioned something about your cholesterol being “a little high” and suggested you cut back on saturated fat and red meat. Maybe they’ve recommended medication. Maybe they’ve said to come back in six months and see how things look.
And you’ve walked away with a blood test result full of numbers and acronyms, but very little idea of what any of it actually means, and even less idea what to do about it.
You’re not alone. Cholesterol is one of the most commonly tested and least well-explained areas of routine health screening. As a Registered Nutrition Practitioner, I sit with people every week who’ve been handed a number, given a vague instruction, and left to work the rest out themselves.
Most people know they have an LDL number and that lower is supposedly better. Few people understand what LDL actually is, why it might be elevated, whether it’s the type that matters, or what the other markers on their results are even measuring.
This blog is your plain-language guide to all of it: what each marker actually means, why the standard NHS panel can miss the most important detail, and what to do next if your results have you worried.
If you’d rather skip the reading and just get your numbers properly looked at, book a free 20-minute call and we’ll talk you through where to start.
Why your total cholesterol number is almost meaningless on its own
The first number most people look at – and the one that tends to cause the most anxiety – is total cholesterol. In the UK, anything above 5.0 mmol/L is often flagged as elevated. If yours says 5.8 or 6.2, the instinct is to panic.
Here’s what’s worth knowing:
- Total cholesterol is a sum.
- It adds together all the cholesterol-carrying particles in your blood, including the protective ones, the neutral ones, and the potentially problematic ones – and gives you a single figure.
- That figure, without context, tells you almost nothing useful about your cardiovascular risk.
So don’t panic, because stress is a risk factor. That we know for sure.
Think of it like being told the total number of vehicles on a motorway without knowing how many are ambulances, lorries, or family cars. The number exists. It doesn’t tell you whether there’s a problem or who’s involved.
What actually matters is the ratio and distribution of those particles. Specifically: how much of your total cholesterol is HDL (the “good” one), how much is LDL (the “bad” one), and what type of LDL it is. A total cholesterol of 6.0 mmol/L with slightly high HDL and large, buoyant LDL particles carries very different implications from a total of 6.0 mmol/L with low HDL and lots of small, dense LDL.
So is 6 high cholesterol? In isolation, it’s a number worth exploring, but not a verdict. The number needs a story around it, and that story is exactly what a proper cholesterol consultation gives you.
LDL cholesterol – what it is, what it doesn’t tell you, and why particle size matters
LDL stands for low-density lipoprotein. It’s often called “bad cholesterol,” but I believe this shorthand does more harm than good because it scares people without giving them the details behind it.
LDL isn’t actually cholesterol; it’s a transport vehicle that carries cholesterol from the liver to the cells and tissues that need it. It’s the direction of travel that gives it its bad name. But the problem isn’t LDL existing. The problem is when there’s too much of it, when it’s the wrong type, or when it becomes oxidised – a process that turns it from a neutral carrier into something that can trigger inflammation in artery walls.
(Worth reading alongside: Is your heart healthy? 5 health markers that will help you decide.)
LDL-C vs LDL-P: what your test is actually measuring
The LDL figure on your standard blood test is LDL-C, which reflects concentration. In other words, the amount of cholesterol that is being carried by LDL particles (LDL-P). What it doesn’t tell you is how many LDL particles there are, or how large or small they are.
Here’s why it matters:
- A small number of large, buoyant LDL particles carrying a lot of cholesterol can produce a high LDL-C reading, but relatively low cardiovascular risk
- A large number of small, dense LDL particles, each carrying less cholesterol, can produce the same LDL-C reading, but a significantly higher risk
- Small dense particles penetrate artery walls more easily, remain in circulation longer, and oxidise more readily
Two people. Same number. Very different risk.
What is a safe LDL level?
The honest answer is that there’s no universal safe level, because the number doesn’t capture the full picture. An LDL-C of 3.5 mmol/L with predominantly large, buoyant particles in the context of excellent metabolic health looks very different from an LDL-C of 3.5 mmol/L with predominantly small, dense particles in the context of insulin resistance and elevated inflammation.
This is exactly the kind of nuance we walk people through in a 1-1 nutrition consultation: your numbers, your context, what’s actually driving them.
ApoB: the metric that brings some clarity
ApoB (apolipoprotein B) is a protein that sits on the surface of every single atherogenic (plaque-forming) lipoprotein particle. Every LDL particle carries exactly one ApoB molecule. This means ApoB gives you a direct count of the total number of potentially harmful particles in your blood, regardless of how much cholesterol each carries.
It’s a more precise measure of risk than LDL-C, and increasingly, it’s the metric that cardiovascular specialists prefer. If you’ve never had your ApoB tested, it’s worth asking about. Or ask us, we run these tests with clients regularly.
Or book your free call and we’ll talk you through the private panels we run with clients.
HDL cholesterol – the “good cholesterol” with a complicated story
HDL (high-density lipoprotein) is the particle responsible for reverse cholesterol transport: collecting excess cholesterol from tissues and arterial walls and carrying it back to the liver for processing and excretion. This is why higher HDL has long been associated with lower cardiovascular risk, and why it gets called the “good cholesterol”.
But the story is more nuanced than the label suggests.
HDL function vs HDL level
Having a high HDL number doesn’t automatically mean your HDL is working well. In some contexts (particularly in people with chronic inflammation, metabolic dysfunction, or obesity), HDL can become dysfunctional. It loses its ability to carry out reverse cholesterol transport efficiently and, in some cases, can become pro-inflammatory. A high HDL level in these circumstances is less protective than it appears.
This is why some people with high HDL still develop cardiovascular disease, and why the naming convention, this time “good cholesterol”, is once again not helpful.
What is a good HDL level?
In general terms, above 1.6 mmol/L for women and above 1.4 mmol/L for men is considered ideal. Below 1.0 mmol/L is associated with increased risk. But as with LDL, context matters. HDL needs to be read alongside triglycerides, insulin markers, and inflammatory markers to tell a complete story.
How do you raise HDL?
Exercise is the most consistently effective intervention, particularly sustained aerobic activity. Quitting smoking improves HDL meaningfully within weeks. Reducing refined carbohydrates and increasing omega-3 fatty acids and other healthy fats both support HDL levels. Diet and lifestyle can make a huge difference to cholesterol balance, and a structured personalised nutrition programme is the fastest way to get there with someone in your corner.
Triglycerides – the underrated marker most people overlook
Triglycerides are the main form of fat circulating in your bloodstream and stored in your fat cells. They appear on almost every standard lipid panel (although not always), but they’re often given less attention than cholesterol, which is a mistake, because they’re among the most informative markers on the page.
What causes high triglycerides?
This is where the most common misconception lives. Triglycerides are not primarily driven by dietary fat. Saturated and trans fats can play a role, but they’re driven predominantly by carbohydrates and alcohol.
When you consume more carbohydrate than your cells can immediately use for energy – particularly refined carbohydrates, high starch and sugar – the liver converts the excess into triglycerides and packages them into VLDL particles for transport and storage. Alcohol has the same effect and is one of the most potent drivers of elevated triglycerides.
Insulin resistance amplifies this process significantly. When cells become less responsive to insulin, the liver continues to produce and release triglycerides even without excess caloric intake, meaning triglyceride levels can be elevated even in people who eat well if the underlying metabolic dysfunction is present.
Below 1.0 mmol/L is optimal. Above 1.7 mmol/L warrants attention. Above 5.0 mmol/L represents a significant risk.
The triglyceride:HDL ratio – your insulin resistance proxy
One of the most clinically useful calculations you can do with a standard lipid panel requires no additional testing: divide your triglyceride level by your HDL level. In UK units (mmol/L), a ratio below 1.0 is excellent. Above 1.5 suggests developing metabolic dysfunction. Above 2.0 is a strong indicator of insulin resistance.
This ratio matters because the combination of high triglycerides and low HDL is a lipid pattern that can be driven by insulin resistance – and it correlates closely with the presence of small, dense LDL particles, even when LDL-C looks completely normal.
(For the full picture of how blood sugar and cholesterol are connected, see cardio-metabolic health: why your blood sugar, cholesterol and blood pressure are the same problem.)
LDL particle size – the distinction your standard blood test misses
We’ve touched on this above, but it deserves its own section because this is the part of the cholesterol story that most people never hear, and it’s arguably the most important.
Why can two people have the same LDL-C with very different risks?
Imagine two people both have an LDL-C reading of 3.8 mmol/L.
One has a pattern A profile: large, buoyant LDL particles, good HDL levels, triglycerides below 1.0, and no insulin resistance.
The other has a pattern B profile: small, dense LDL particles, low-normal HDL, triglycerides above 1.8, and elevated fasting insulin. Same LDL-C number. Very different cardiovascular risk.
Small, dense LDL particles are more dangerous for three reasons:
- They slip through arterial walls more easily
- They persist in circulation longer because LDL receptors clear large particles more efficiently
- They are significantly more susceptible to oxidation, which triggers the inflammatory cascade that leads to plaque formation
How does insulin resistance drive the dangerous pattern?
When insulin resistance is present, the liver overproduces VLDL. As those VLDL particles are broken down in the bloodstream, they produce a higher proportion of small, dense LDL rather than large, buoyant LDL. This is why improving blood sugar balance and insulin sensitivity is so often more effective at shifting the lipid pattern than dietary fat restriction, because it addresses the underlying mechanism driving the problem.
A standard GP blood test will not tell you your LDL particle size. The advanced testing that we run with clients does, alongside ApoB, sdLDL, oxidised LDL, fasting insulin, homocysteine and more.
What to ask your GP and what to consider testing privately
Your GP is working within a system designed for population-level risk management. A standard lipid panel is what NICE guidelines support for routine screening – and for good reason. But if you want a complete picture, there are additional markers worth knowing about.
What to ask your GP for:
- ApoB – increasingly available on the NHS, but not always. Worth requesting if your LDL-C is borderline or if you have a family history of cardiovascular disease.
- Lp(a) – NICE now recommends this be tested at least once in a lifetime; if you haven’t had it, ask. It’s a genetic marker and an independent cardiovascular risk factor that lifestyle cannot meaningfully change.
- HbA1c – if not recently tested, this gives a three-month average of blood sugar control and is directly relevant to how your lipid picture should be interpreted.
- hsCRP – not always available on the NHS, but worth requesting. It reveals the inflammatory context around your cholesterol results. (hs stands for high sensitivity. Standard CRP is more commonly tested.)
These require private testing, but frequently change the picture:
- Fasting insulin – one of the earliest markers of metabolic dysfunction. However, it is not routinely available on the NHS, but frequently the most important number in the room.
- sdLDL – requires a specialist lipid panel; tells you what type of LDL you actually have.
- Full ApoB alongside standard lipids.
- Oxidised LDL – particularly relevant where inflammation is already indicated.
- A comprehensive cardio-metabolic panel that brings all of the above together – and anything your GP can’t do.
If you’d like to skip the back-and-forth and have all of this run, interpreted and turned into a plan in one go, our Wellness Check is built for exactly that.
How Integral Wellness interprets your cholesterol results differently
A number on a page is a starting point. At Integral Wellness, we look at what’s behind it.
That means running a comprehensive cardio-metabolic panel that goes well beyond the standard GP screen and includes ApoB, Lp(a), sdLDL, oxidised LDL, homocysteine, hsCRP, fasting insulin, and HbA1c. It means understanding the metabolic context: how your blood sugar, insulin, and inflammatory load are interacting with your cholesterol picture. And it means taking your genetics into account, including nutrigenomic testing for the variants that affect how you make, clear, and respond to cholesterol.
The goal isn’t to give you a better number. It’s to give you an accurate picture of what’s actually driving your results, and a genuinely personalised plan to address it.
This is the work we do every day. Whether you’re:
- Currently on statins and want to understand what’s really going on beneath the managed number,
- Looking to avoid medication and want to know what’s genuinely worth doing for your specific biology,
- Carrying a family history of cardio-metabolic disease and want to understand before it becomes your own story,
our Cholesterol Nutrition Programmes are personalised and designed to take you from worried number on a page to I know what’s happening and what to do about it.
If you’d like to see what that’s looked like for other people, Dave, who is medication-free at 69, and Sue brought her blood pressure back into range without statins. Both started with exactly the kind of conversation we’d have on a free call.
