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Why diet matters

Triglycerides and cholesterol are both blood lipids, but they do not respond to food in exactly the same way. LDL cholesterol tends to rise with diets high in saturated fat and trans fat, while triglycerides are especially affected by excess calories, refined carbohydrates, sugary drinks and alcohol. The encouraging part is that everyday food choices can improve both at the same time.

What changes help lower LDL cholesterol?

MedlinePlus explains that saturated fat is the main dietary driver of higher blood cholesterol, so a common recommendation is to eat less of it and use healthier unsaturated fats instead. In practical terms, that means more olive oil, nuts, seeds, beans and lentils, and fewer fatty meats, butter, cream and ultra-processed snack foods. Soluble fibre also matters because it helps reduce cholesterol absorption in the digestive tract. Good sources include oats, barley, beans, lentils, apples, citrus fruit and psyllium.

What helps lower triglycerides?

Triglycerides are strongly influenced by your total calorie balance. If you often eat more energy than your body uses, especially from sugar, white flour, sweet drinks or alcohol, triglycerides can rise. HEART UK emphasises cutting back on added sugar and refined carbohydrates, choosing whole grains instead, limiting alcohol and aiming for a healthy weight. Regular exercise also helps, but diet is often the biggest day-to-day lever.

Foods worth building meals around

A useful pattern is a mostly plant-forward plate: vegetables, pulses, whole grains, fruit, nuts, seeds and healthy fats. A breakfast of oats with berries, a lentil soup at lunch, and a dinner based on beans, tofu or tempeh with vegetables and brown rice is a simple example. If you eat dairy, choose lower-fat options more often. Portfolio-style foods such as oats, soy foods, almonds and legumes can be especially helpful for LDL cholesterol.

Foods and habits that often get in the way

Common problems include fried foods, pastries, processed meats, cream-heavy sauces, large portions of refined starch and frequent sugary drinks. Alcohol deserves a special mention because it can push triglycerides up quickly in some people. That does not mean every person needs the same diet, but if your triglycerides are high, alcohol is worth discussing honestly with your clinician.

Think patterns, not perfection

You do not need a “detox” or a crash diet. The best plan is the one you can follow consistently. Start with two or three changes: switch breakfast to oats, add beans or lentils several times a week, cook more often with olive oil, and cut down on sweet drinks and late-night snacking. If your numbers are very high, especially triglycerides, medical treatment may also be needed, so use food as part of a bigger plan rather than the only tool.

For evidence-based guidance, see MedlinePlus on cholesterol, HEART UK on triglycerides and Mayo Clinic’s guide to cholesterol-friendly foods.

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How to lower cholesterol through diet

Many people believe that the trend towards low cholesterol diets comes from young people dieting themselves to death, but this is not so. Keeping cholesterol levels in check is not only a matter of appearance but also of health. High cholesterol levels can cause a host of complications and diseases, including heart attack and stroke, which can even cause death.

Problems such as hypertension, heart disease and diabetes come to mind. This is especially relevant for older people and those in middle age, because cholesterol levels tend to rise with age and the body’s processes, especially digestion and the conversion of fats to energy, slow down. This is perhaps why doctors often ask older people, especially those with weight issues, to reduce the saturated fat and cholesterol they eat.

What is cholesterol?

People have been talking about cholesterol, but do they know what it is and how it affects the body? Because of the rising number of heart problems in the country, cholesterol has become a public enemy. Everybody thinks that cholesterol is bad.

Actually, not all cholesterol is bad for the body. In fact, our bodies need cholesterol to make bile salts. It is also a main ingredient in maintaining hormonal balance and in the production of vitamin D. Things become troublesome when the levels get too high and the cholesterol builds up in the arteries, making it hard for the blood to flow and the heart to pump.

There are two kinds of cholesterol, the good and the bad. LDL is the bad kind. It sticks to the artery walls and forms plaques that eventually narrow the passage. Saturated fats and trans fats raise LDL, and they are often found in packaged foods such as potato snacks and baked goods.

HDL, on the other hand, is the good kind and helps to lower LDL levels. It picks up LDL cholesterol from the artery walls and carries it to the liver, where it is removed from the body. Unlike LDL, HDL is not something you eat: your body makes it. Regular exercise, not smoking and healthy fats, such as those in nuts, fish and olive oil, help keep HDL levels up.

People who need to lower their LDL levels are also advised to eat plenty of fruit because of the fiber it provides. Oats, cereals and legumes are also great sources of soluble fiber, which can help combat the rise of LDL cholesterol and so reduce the risk of heart disease.

Factors that affect cholesterol levels

Contrary to popular opinion, it is not only food that matters when dealing with high cholesterol levels. There are actually a lot of factors that affect the condition. One of them is age and gender: levels tend to rise as we get older. Another is physical activity. Exercise can help lower LDL cholesterol and raise HDL, and it also strengthens the body and tones the muscles. Genetics, weight and smoking play a role too.

Lowering cholesterol levels

From what was said above, it seems wise to lower cholesterol levels, if one has the discipline to see it through. Just eat right and exercise regularly, limit packaged and fried foods, and you are on your way to lower cholesterol levels.

Exercise and cholesterol: how physical activity helps

Cholesterol is a substance found in every human body. It is one of the many things the body produces in order to function properly.

Unfortunately, a diet high in sugar, saturated fat and alcohol can do more harm than good. Over time it raises the risk of high blood pressure, diabetes, heart attack and stroke.

The good news is that there are ways to prevent this before it happens. It takes some effort and hard work, especially as the body becomes less forgiving with age.

Why exercise helps

Along with eating less and improving your diet, exercise is one of the most effective ways to improve your cholesterol. Regular activity raises your heart rate, helps with weight control, raises HDL (the good cholesterol) and can modestly lower LDL and triglycerides.

Getting started safely

Those who have not exercised before should first talk to a doctor to find out what is safe. People with a heart condition may not be able to do strenuous exercise and may need low-impact activities such as walking, stretching or light weights.

If the doctor says the patient can do more intense exercise, options include running, swimming, aerobics and cycling. The right type of activity depends on several factors, not only medical history, but also gender, age and weight.

The doctor can recommend an activity, and the person can pass this on to a fitness instructor so they know what is safe. From there, an exercise program can be made, and all the patient has to do is follow it.

After a month or two, there are often improvements in good and bad cholesterol levels, as well as some weight loss.

Exercise works best together with a healthy diet, and it does not replace medication. If your doctor has prescribed a cholesterol-lowering drug, keep taking it and ask before making changes; for many people, medicine and exercise work together to lower cholesterol.

Easy ways to be more active

If you do not have time to go to a gym, there are other ways to work your muscles and raise your heart rate. For starters, you can go for a brisk walk early in the morning or before work.

Some companies and hospitals encourage people to walk up one or two flights of stairs instead of taking the elevator. If your workplace has a big parking lot, you can park a little further from the door and walk the extra distance.

During any exercise, it is best to drink plenty of water. This prevents dehydration, which can lead to exhaustion. Instead of going to the fountain every few minutes, bring a water bottle.

This saves time and lets you keep pace with the group activity or the work you are doing on the machine.

Someone once said that health is wealth. By exercising, you can improve your cholesterol and lower your risk of heart disease, unlike those who know the dangers but never make any lifestyle changes.

The old version of this post said that high cholesterol is linked to a long list of diseases, that most people eat a diet high in saturated fat and “LDL,” and that a low-cholesterol diet plan should not be a fad. The advice to treat the diet as a long-term habit is good, but LDL is not a food, so I have rewritten the post to follow what health agencies actually recommend.

Why follow a low-cholesterol diet plan?

MedlinePlus explains that too much LDL (“bad”) cholesterol in the blood can build up on artery walls and raise your risk of coronary artery disease. The old post called heart disease the number one killer in the U.S., and that is still true: the CDC reports that heart disease was the leading cause of death in 2023. Food is one of the main things you can change. According to the National Heart, Lung, and Blood Institute, the Therapeutic Lifestyle Changes (TLC) and DASH eating plans can help you lower your LDL.

What does the TLC plan ask for?

The numbers from MedlinePlus are a good guide for a plan:

Get 25 to 35 percent of your daily calories from fat, with less than 7 percent from saturated fat (about 13 grams on a 2,000-calorie diet). Eat less than 200 milligrams of dietary cholesterol a day. Aim for 10 to 25 grams of soluble fiber. Include about 2 grams of plant stanols and sterols, omega-3 fish twice a week, and no more than 2,300 mg of sodium a day. Limiting salt will not lower cholesterol, but it lowers blood pressure and heart risk.

Which foods do the work?

The old post says that fiber “soaks up” cholesterol and carries it out of the body, and names apples, oranges, pears, oats and carrots. MedlinePlus describes it this way: soluble fiber helps prevent your digestive tract from absorbing cholesterol. Its list of high-fiber foods includes oatmeal and oat bran, apples, bananas, oranges, pears, prunes, kidney beans, lentils and chickpeas. Carrots are a healthy vegetable, but they are not on that list. Saturated fat, found in some meats, dairy products, baked goods and fried foods, raises LDL more than anything else in your diet, so swap it for unsaturated oils such as olive or canola oil. For specific meals, see how a good diet can lower cholesterol: one example day.

What could one week look like?

This is my own template, not a prescription, and portion sizes depend on your calorie needs. Start the day with oatmeal and fruit. For lunch, have lentil or bean soup with a salad. Eat fish such as salmon or canned tuna twice a week. Make vegetables half the dinner plate, and snack on an apple or a handful of nuts. Keep dessert occasional. The NHLBI recommends preparing foods with little or no salt and eating a variety of nuts. For a longer list of foods to choose, read how to lower cholesterol through diet.

Is diet enough?

Sometimes it is not. The NHLBI says that your provider may also recommend medicines, and that adults with overweight can lower LDL and raise HDL by losing 3 to 5 percent of their body weight. Genes, other conditions and some medicines also affect cholesterol. Ask for a test, and use understanding your cholesterol numbers to read the results. For more recipes and swaps, see MedlinePlus on lowering cholesterol with diet.

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A cholesterol test report is full of numbers, and it is easy to feel lost. Knowing what each one means makes it much simpler to see where you stand and what, if anything, to change. Here is a plain guide to the main numbers, with the levels that MedlinePlus lists as healthy for most adults.

What does a cholesterol test measure?

A standard blood test, called a lipid panel, shows your total cholesterol, LDL cholesterol, HDL cholesterol and triglycerides. LDL is often called “bad” cholesterol because it is the main source of cholesterol buildup and blockage in the arteries. HDL is the “good” kind, because it helps remove cholesterol from your arteries. Triglycerides are not cholesterol, but they are another type of fat in the blood, and they can also raise your risk of heart disease. Some reports also give a non-HDL number, which is your total cholesterol minus your HDL.

Your doctor may ask you to fast for 9 to 12 hours before the test, which means nothing but water. Follow the instructions you are given.

What are healthy levels?

MedlinePlus gives these general targets for adults aged 20 and older, measured in milligrams per deciliter (mg/dL): total cholesterol under 200, non-HDL under 130, and LDL under 100. HDL of 60 or more is best, and below 40 in men or below 50 in women is considered low. Triglycerides are normal below 150, borderline high at 150 to 199 and high at 200 or more. Your own targets may differ with your age, blood pressure, weight, family history and other conditions, so ask your doctor what they should be for you.

Why does the balance matter?

Having a lot of LDL and little HDL is what puts you at risk. Over time, extra LDL helps form plaque on artery walls, which can narrow them, and this can lead to heart attack or stroke. A high number is not a diagnosis of anything by itself, but it is a warning that is worth acting on while you can still do so with food and exercise.

How can you improve your numbers?

There are four main routes, and they usually work best together.

Eat for your heart. Eat less saturated fat from fatty meat, butter and full-fat dairy, and more fish, fruit, nuts, oats and vegetables. See our guides on how to lower cholesterol through diet and a diet to lower cholesterol.

Move more. Regular physical activity lowers LDL and triglycerides and raises HDL. Our post on exercise and cholesterol explains how much to aim for.

Aim for a healthy weight. The National Heart, Lung, and Blood Institute notes that adults with overweight or obesity can lower LDL and raise HDL by losing only 3% to 5% of their weight.

Take medicine if your doctor recommends it. Several kinds exist, including statins, ezetimibe and bile acid sequestrants. Read more in our post on when lifestyle is enough and when medicine helps. Some of these drugs have side effects, so your doctor should explain them to you before prescribing.

How often should you get tested?

Practice varies with your age and risk, but according to MedlinePlus, younger adults aged 21 to 65 should generally have the test every 5 years, and men aged 45 to 65 and women aged 55 to 65 every 1 to 2 years. People older than 65 should be tested every year. If cholesterol problems, early heart disease or diabetes run in your family, your doctor may suggest testing sooner or more often. A regular checkup costs far less than treating a heart attack, and it gives you the chance to prevent one.