LDL stands for Low-Density Lipoproteins. This type of cholesterol is produced by the liver and is instrumental in the creation of cell walls, hormones, and digestive juices. However, when your LDL level is high, it can start to form a plaque-like substance on the walls of your cardiovascular system, blocking the natural flow of blood and leaving you at severe risk for heart attack and stroke. Put simply, LDL is the bad kind of cholesterol. But fear not – there are several ways in which you can lower your LDL cholesterol and encourage the development of High-Density Lipoproteins (good cholesterol), which actually function to limit the level of LDL cholesterol in your system.
The most important mechanism by which HDL exerts its antiatherogenic role is the removal of excess cholesterol from peripheral cells and its transport to the liver, a process commonly termed the reverse cholesterol transport system (RCT). Several proteins are involved in this process, including ATP-binding cassette transporter 1, LCAT, CETP, and hepatic triglyceride lipase (see Pathophysiology). [25]
It’s harder to increase HDL or "good" cholesterol than it is to lower LDL or total cholesterol. It’s estimated that up to 80 percent of the variation in HDL from person to person is due to genetic factors. But the following steps have been shown to boost HDL—and they are worth taking because they also lower total cholesterol and help protect the heart in many ways beyond their effect on HDL.

Trans fats increase your LDL cholesterol, reduce your HDL levels and raise your risk of developing heart disease, stroke, diabetes and other chronic conditions. Trans fats lurk in fried foods, stick margarine, cookies, crackers, cakes, pie crusts and frozen pizza. Today, some food manufacturers are removing them from their products, but the only way to tell if a product is trans fat-free is to read labels while you’re shopping. Avoid products that list “partially hydrogenated oil” in the ingredients, since this is just a sneaky name for trans fats.
In a Canadian study, drinking a few glasses of orange juice every day for four weeks increased participants’ HDL by 21 percent, possibly due to a flavonoid called hesperidin that appears extremely HDL-friendly. Subsequent research found that tangerine juice may be even more effective. Unfortunately, that much juice will add hundreds of excess sugar calories to your diet. So stick to a glass a day and be satisfied with lesser results. Or you can buy hesperidin as a supplement, though it won’t replace the many beneficial nutrients of orange juice (and certainly won’t taste as good).
In fact, moderate alcohol consumption has actually been linked with higher levels of HDL cholesterol. (6) Moderate consumption for healthy adults is one alcoholic drink per day for women of all ages and men over 65 and up to two drinks per day for mean 65 and under. Organic red wine is a smart choice, but don’t start drinking just to improve HDL levels because overdoing does much more harm than good — both for cholesterol levels and your overall health.
Ground-breaking research published in the Journal of the American Medical Association (JAMA) studied nearly 9,000 European patients. All had previously suffered heart attacks. The trial found that those who reduced their LDL levels to an average 81 with high-dose statins significantly reduced their risk of major coronary events like heart attacks and strokes at the 4.8 year follow-up compared to patients who reduced their LDL to 104 on usual-dose statin therapy.
HDL particles are heterogeneous. They can be classified as a larger, less dense HDL2 or a smaller, denser HDL3. [16] Normally, most of the plasma HDL is found in HDL3. [17] To add to the complexity of HDL classification, HDL is composed of 4 apolipoproteins per particle. HDL may be composed of apo A-I and apo A-II or of apo A-I alone. HDL2 is usually made up only of apo A-I, while HDL3 contains a combination of apo A-I and apo A-II. HDL particles that are less dense than HDL2 are rich in apo E.
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Are you pouring up a glass of OJ in the morning? Is your daily caffeine fix a fountain coke at the local gas station? What about that fruity cocktail tempting you at happy hour? Eliminating sweetened beverages from the daily routine is one of the easiest ways to cut thousands of calories or more per week, but will also put years on your life. Water is the best form of hydration and can be flavored with citrus, tropical fruits, and herbs to create a refreshing spa-like oasis that will increase HDL levels when it replaces your typical sugar-sweetened beverages.
Get Moving – Want healthy HDL levels? It’s time to lace up those sneakers and start exercising! Being physically active is essential for a healthy heart. Many types of exercise will help raise your HDL cholesterol, including high-intensity exercise, aerobic exercise, and strength training. Shoot to exercise most days out of the week for at least 30 minutes each session to experience the benefits.
Starting a simple exercise routine is another way to help lower your elevated LDL cholesterol level. And if you compound working out with the dietary tips listed above, you could potentially lower your LDL level by over 37 percent and increase your HDL cholesterol by over 5 percent in just two months. Not to mention the added benefits of losing weight, decreased stress, and higher energy, exercising is an all-around great activity to incorporate into your life. Aim for 30 minutes of physical activity, four to five times each week, and you’ll be well on your way.
HDL serves as a chemical shuttle that transports excess cholesterol from peripheral tissues to the liver. This pathway is called the RCT system. In this system, plasma HDL takes up cholesterol from the peripheral tissues, such as fibroblasts and macrophages. (A study by El Khoury et al indicated that in persons with HALP, macrophages have an increased plasma cholesterol efflux capacity. [18] ) This may occur by passive diffusion or may be mediated by the adenosine triphosphate (ATP)–binding cassette transporter 1. The latter interacts directly with free apo A-I, generating nascent, or so-called discoidal, HDL. Cholesterol undergoes esterification by lecithin-cholesterol acyltransferase (LCAT) to produce cholesteryl ester, which results in the production of the mature spherical HDL. Cholesterol is also taken up from triglyceride-rich lipoproteins in a process mediated by a phospholipid transfer protein (ie, CETP). [19, 20, 21, 22]
Typically, a fasting plasma lipid profile is ordered to measure LDL, HDL, total cholesterol, and triglyceride levels. Lipids in plasma and in isolated lipoprotein fractions are quantified by enzymatic methods. Prior consumption of food has little effect on the determination of HDL, with postprandial blood samples usually yielding results that can be well interpreted. [14, 2] Current clinically available techniques can determine the cholesterol content, but not the biologic function, of HDL particles. [2]
8. Foods fortified with sterols and stanols. Sterols and stanols extracted from plants gum up the body's ability to absorb cholesterol from food. Companies are adding them to foods ranging from margarine and granola bars to orange juice and chocolate. They're also available as supplements. Getting 2 grams of plant sterols or stanols a day can lower LDL cholesterol by about 10%.
You've probably heard that fried foods of all kinds, hydrogenated oils, and full-fat dairy products are cholesterol bombs that are best avoided (and not just by those watching their cholesterol levels). The American Heart Association recommends that everyone restrict these foods, as they contain trans and saturated fats, the "bad" kind that raises LDL cholesterol and leads to plaque buildup in the arteries.