Have you been told that your cholesterol levels are elevated and aren’t sure what that actually means? Would you like to know whether cholesterol is really bad for you? Or are you wondering how to improve your blood lipid levels and counteract high cholesterol?
This post explains what cholesterol actually is and which factors affect cholesterol levels. You’ll also find practical recommendations related to cholesterol.
Note: The information in this post does not replace a conversation with a medical professional. Therefore, speak with a qualified healthcare professional for advice tailored to your individual health situation. The information in this post can help you prepare for or follow up on that conversation.
The role of cholesterol in the body
As a fat-like substance, cholesterol belongs to the lipid family (commonly referred to as fats) and is often described as a blood lipid. Unlike many other fats, healthy individuals can produce most of their cholesterol themselves through the body’s own synthesis processes. Only about one-third needs to come from food.
Like other lipids, cholesterol serves several important functions in the body. For example, it provides energy and is an essential component of cell membranes. It is also involved in many metabolic processes, including vitamin D production and the production of sex hormones. Cholesterol plays a key role in another metabolic process as well: it is the primary building block of bile acids, which are necessary for healthy and efficient fat digestion.
Now that you have a better understanding of why cholesterol is essential for the body, it’s important to know that excessive cholesterol levels can have significant negative effects on health. The following sections explain how that can happen.
Understanding “good” & “bad” cholesterol
Cholesterol and other fats circulating in the body need to be packaged for transport through the bloodstream because they are not water-soluble. This job is carried out by lipoproteins, which are water-soluble fat-protein complexes that form a transport shell around fats. The two main types are high-density lipoprotein (HDL) and low-density lipoprotein (LDL).
High-density lipoprotein (HDL)
HDL cholesterol helps transport excess cholesterol from tissues and blood vessel walls back to the liver, where it can be processed and removed from the body. Because it helps clear cholesterol, HDL is associated with several health benefits. These include protecting blood vessels from fatty deposits and lowering the risk of heart attacks, strokes, and other arterial diseases. For this reason, HDL is often referred to as “good” cholesterol.
Low-density lipoprotein (LDL)
LDL cholesterol serves the opposite function by transporting cholesterol from the liver to other tissues and blood vessels.
However, when LDL levels become too high, they can contribute to a variety of health problems, including an increased risk of atherosclerosis. This condition occurs when fatty substances gradually build up inside blood vessels. These deposits, known as plaques, narrow and block blood vessels over time, making it more difficult for blood to flow through them. As a result, arteries can become obstructed, potentially leading to coronary artery disease, heart attack, or stroke.
Because of these effects, LDL is commonly known as “bad” cholesterol.
Factors that contribute to high cholesterol
High blood lipid levels, especially elevated total cholesterol and LDL cholesterol, can pose serious health risks. In fact, they are among the most significant risk factors for cardiovascular disease, which remains one of the leading causes of death in many countries.
That’s why it’s important to take elevated cholesterol levels seriously, have them monitored and treated by healthcare professionals, and influence the factors that are within your control whenever possible.
But is diet the only cause of high cholesterol? The following sections outline the most common reasons for elevated blood lipid levels.
When is cholesterol considered high? When measuring cholesterol, both total cholesterol and the individual HDL and LDL values play a role, as does the relationship between these values. Total cholesterol alone provides limited information. If you’ve only been given your total cholesterol value, consider asking your medical professional for a more detailed explanation.
Taking individual circumstances into account, healthy adults should generally have a total cholesterol level below 200 mg/dL. Depending on sex, HDL cholesterol should be above 40-45 mg/dL. Recommended LDL levels depend largely on a person’s overall health status. While healthy individuals should generally aim for less than approximately 115 mg/dL, people at higher risk often need significantly lower levels, ranging from below 55-100 mg/dL, depending on their risk profile.
Physical causes
Some cholesterol-related factors are difficult or impossible to control. These include:
- genetic predisposition and inherited disorders
- age and hormonal changes, e.g., early menopause
- liver disease, kidney disease, and hypothyroidism
- bile duct obstruction
- taking certain medications
Tip: If one or more of these factors may be contributing to your elevated cholesterol levels, discuss appropriate next steps with your medical professional. Together, you can explore options such as adjusting medications, considering alternative treatments, or finding other ways to manage your symptoms.
Lifestyle-related causes
Alongside factors that are largely outside your control, there are also influences you can actively change. Your lifestyle plays a major role in determining your blood lipid levels. Key factors include:
- diet: Diets high in saturated fats and trans fats are associated with a variety of negative health effects. In addition to promoting inflammation, they raise LDL cholesterol levels and can negatively affect blood vessel health.
- nicotine and alcohol consumption: Even moderate amounts of alcohol may increase blood lipid levels. Tobacco use lowers HDL cholesterol and accelerates the development of atherosclerosis by further narrowing blood vessels.
- physical inactivity and excess weight: Both factors can contribute to high cholesterol levels, especially when combined with other lifestyle-related influences.
Recommendations for lowering cholesterol
The lifestyle factors associated with high cholesterol also point to practical ways to lower it. Naturally, this is a process that takes time and depends on daily habits. Be patient with yourself and the progress you make.
The key is to start with sustainable changes, integrate them into your routine, and build on them over time. The following areas are particularly important:
- make long-term dietary changes: A heart-healthy diet does not eliminate fats altogether. Instead, it emphasizes health-promoting fats, particularly unsaturated and polyunsaturated fatty acids, in appropriate amounts. Focus on sustainable dietary habits rather than short-term diets.
- reduce alcohol and tobacco use: Even if it feels challenging, giving up alcohol and tobacco products can be a real game changer for your health. Drinking less alcohol can help you reduce calorie intake and lose excess body fat, while avoiding tobacco lowers the risk of heart attack, stroke, and other diseases. Although it may not be easy, sticking with these changes is worth it. Many people notice positive effects within just a few weeks.
- become physically active: Regular exercise improves metabolism, helps burn calories, and lowers the risk of cardiovascular disease and diabetes. Endurance activities, in particular, appear to have positive effects by increasing HDL cholesterol and lowering LDL cholesterol at the same time. Daily movement is highly beneficial, e.g., cycling, running, or swimming.
Note: If your cholesterol levels are moderately to significantly elevated, professional guidance can be especially valuable. Stay in regular contact with your medical professional and consider involving other qualified professionals when needed, such as through nutrition counseling or addiction counseling.
You’ve now learned a great deal about cholesterol and can better understand medical information on this topic. Did any of the information about cholesterol and blood lipids surprise you? Or were there aspects that were different from what you previously believed?
The key takeaway is this: cholesterol only becomes a health concern when there is too much of it in the body, especially LDL cholesterol. With the right medical support, professional guidance, and lifestyle changes, many people can significantly improve their cholesterol levels and lower their health risks. So don’t hesitate to seek support if you’re unsure about your situation. We wish you all the best for the future!
You can find additional information on this topic here:
Bundeszentrum für Ernährung (BZfE) (2018). Herzgesund leben: Cholesterinbewusst essen (Art.-Nr. 1301, 6. Aufl.). Bundesanstalt für Landwirtschaft und Ernährung. https://www.ble-medienservice.de/1301-6-herzgesund-leben-cholesterinbewusst-essen.html
Deutsche Gesellschaft für Ernährung e. V. (2014, Dezember). Sekundäre Pflanzenstoffe und ihre Wirkung auf die Gesundheit. https://www.dge.de/wissenschaft/fachinformationen/sekundaere-pflanzenstoffe-und-die-gesundheit/
Deutsche Herzstiftung (o. D.). Cholesterin: alles, was Sie wissen müssen. https://herzstiftung.de/ihre-herzgesundheit/gesund-bleiben/cholesterin