Understanding and managing high cholesterol
A raised cholesterol result is common, manageable, and rarely cause for alarm on its own. This page explains what your numbers mean, why they matter, and the changes that make the biggest difference.
The short version. Cholesterol is a fatty substance your body needs, but too much of the wrong type, over many years, can build up in your arteries and raise your risk of heart attack and stroke. The good news is that cholesterol responds well to changes in what you eat and how you live — and where it doesn't, effective medication is available. Importantly, your cholesterol is only one piece of your overall cardiovascular risk, which is why your GP looks at the whole picture rather than a single number.
What your numbers mean
A cholesterol blood test (a lipid profile) reports several values, not just one. They travel through your blood in different particles, and they don't all do the same thing — which is why "high cholesterol" is a slight oversimplification. Here is what each line on your result refers to.
Why the targets say "general". There is no single correct cholesterol level for everyone. The right LDL target for you depends on your overall cardiovascular risk — someone who has had a heart attack or has diabetes will be aimed considerably lower than someone with no other risk factors. Treat the figures above as orientation, not as your personal goal, which your GP will set with you.
It's about more than cholesterol
Cholesterol rarely causes problems in isolation. What matters is your total cardiovascular risk — the combined likelihood, over the next ten years, of a heart attack or stroke. Your GP estimates this using a tool such as QRISK, which weighs your cholesterol alongside several other factors:
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Age and sex — risk rises with age and differs between men and women.
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Blood pressure — raised blood pressure compounds the effect of cholesterol.
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Smoking — one of the single most powerful and most reversible risk factors.
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Diabetes — meaningfully raises risk and lowers the cholesterol targets we aim for.
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Family history — heart disease in a parent or sibling at a young age is significant.
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Weight, activity and diet — each independently influences your risk.
This is why two people with identical cholesterol can be given very different advice. It also means that lowering risk is rarely about one number — improving blood pressure, stopping smoking and increasing activity all count, even before cholesterol changes.
Managing it through lifestyle
For most people, lifestyle changes are the foundation of cholesterol management and the first step before any medication is considered. The changes below are listed roughly in order of how much evidence supports them.
A Mediterranean-style diet
THE SINGLE MOST EFFECTIVE DIETARY PATTERN
Rather than focusing on one "superfood," the Mediterranean pattern is a whole way of eating that has the best evidence for reducing cardiovascular events. In the landmark PREDIMED trial, this approach reduced major cardiovascular events by around 30% compared with a low-fat diet. The core principles:
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Plenty of vegetables, fruit, wholegrains and legumes at the centre of most meals.
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Extra-virgin olive oil as your main fat, in place of butter and other saturated fats.
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Nuts and seeds — a daily handful (walnuts, almonds) is associated with better lipid profiles.
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Fish, especially oily fish (salmon, mackerel, sardines) two or more times a week.
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Less red and processed meat, and fewer refined and ultra-processed foods.
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Moderation with alcohol rather than the wine being a "health food."
Learn more: the Irish Heart Foundation has a clear, practical guide to the Mediterranean diet and how to follow it — irishheart.ie — the Mediterranean diet.
Plant stanols and sterols — Benecol
A MEASURABLE, EVIDENCE-BASED LDL REDUCTION
Plant stanols and sterols are naturally occurring compounds that partially block the absorption of cholesterol from the gut. Taken consistently at the recommended dose — around 2 grams per day, the amount in one Benecol "shot" or two to three portions of the fortified spreads, yoghurts or drinks — they lower LDL cholesterol by roughly 7–10% within a few weeks.
A few practical points worth knowing:
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The effect depends on taking them daily and with food; the benefit fades if you stop.
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They work in addition to, not instead of, a good diet — and can be combined with statins for a further effect.
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They are not suitable for everyone — they should be avoided in pregnancy and in a rare inherited condition called sitosterolaemia. If unsure, check with your GP or pharmacist.
Soluble fibre
AN EASY, UNDERRATED WIN
Soluble fibre binds cholesterol in the gut and helps remove it. Increasing your intake is one of the simplest dietary changes with a genuine LDL-lowering effect. Good sources include oats and barley (rich in beta-glucan), beans, lentils and chickpeas, apples, pears and citrus, and psyllium husk. Aiming for porridge in the morning and a daily serving of legumes is an achievable target.
The fats you choose
SWAP, DON'T JUST CUT
What raises LDL most is not dietary cholesterol itself but saturated and trans fats. The most effective move is to replace them with unsaturated fats rather than simply eating less fat overall.
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Reduce butter, fatty and processed meats, pastries, cakes and deep-fried foods.
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Avoid trans fats — found in some processed and shop-bought baked goods.
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Choose instead olive and rapeseed oils, oily fish, nuts, seeds and avocado.
Activity, weight, smoking and alcohol
THE WIDER LEVERS
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Physical activity — aim for at least 150 minutes of moderate activity a week. It raises protective HDL, lowers triglycerides and improves overall risk.
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Weight — even modest weight loss improves triglycerides and LDL if you are carrying excess weight.
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Smoking — stopping is one of the most powerful single steps you can take for your heart, lowering HDL loss and overall risk quickly.
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Alcohol — keeping within recommended limits helps, particularly with triglycerides.
When lifestyle isn't enough
Lifestyle is the foundation, but for some people it isn't sufficient on its own — particularly those at higher overall risk, those who have already had a cardiovascular event, or those with a strong inherited tendency to high cholesterol. In these situations medication is not a failure of willpower; it reflects the level of risk.
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Statins are the best-established cholesterol-lowering medicines, with decades of evidence that they reduce heart attacks and strokes. Most people tolerate them well.
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Ezetimibe reduces cholesterol absorption and is often added to, or used alongside, a statin.
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Newer injectable treatments are available for selected people who need further reduction.
Familial hypercholesterolaemia — worth knowing about
A small but important number of people inherit a tendency to very high cholesterol from birth, called familial hypercholesterolaemia (FH). It is more common than often assumed and substantially raises lifelong risk, but responds well to treatment once identified. Very high cholesterol readings, or a family history of heart disease at a young age, should always be assessed rather than managed by diet alone.
Find out more
The Irish Heart Foundation offers clear, reliable guidance on cholesterol and heart health, including practical eating advice and recipes: irishheart.ie — Cholesterol
This resource is intended as general information for patients with raised cholesterol.
The information above is provided for general guidance only and does not replace individual medical advice. Cholesterol targets and treatment decisions depend on your personal cardiovascular risk and should be made with your GP. Reference values quoted are general adult guides and may differ from the targets set for you. Do not start, stop or change any medication on the basis of this page. Last reviewed: June 2026.