Elevated cholesterol levels, particularly high LDL cholesterol, are among the most important modifiable risk factors for atherosclerosis, heart attack, and stroke. Cholesterol is essential for cell membranes, hormones, and bile acids, but an imbalance in the blood promotes plaque buildup in the arteries. Many people have borderline or elevated levels, often without symptoms. Early detection through laboratory values and targeted dietary changes can lower levels and significantly reduce cardiovascular risk. The following information is based on current European and German guidelines (ESC/EAS focused update 2025, DGK implementation, DEGAM, and DDG).
Which Cholesterol Values Are Relevant and What Do They Mean?
Cholesterol status is determined by several parameters in the blood, which together assess risk. Values are measured after fasting (at least 9–12 hours).
The key blood values are:
- LDL Cholesterol ("bad" cholesterol): Transports cholesterol into the arteries and promotes deposits. It is the primary target parameter. Therapy goals depend on individual cardiovascular risk (low, medium, high, very high – calculated, for example, with SCORE2 or in case of pre-existing conditions).
- Low risk: < 116 mg/dl (< 3.0 mmol/l)
- Medium risk: < 100 mg/dl (< 2.6 mmol/l)
- High risk: < 70 mg/dl (< 1.8 mmol/l) and at least a 50% reduction from baseline
- Very high risk (e.g., after heart attack, stroke, diabetes with complications, familial hypercholesterolemia): < 55 mg/dl (< 1.4 mmol/l) and at least a 50% reduction
- Total Cholesterol: Includes all fractions. Often used as a rough marker; values below 200 mg/dl (< 5.2 mmol/l) are considered desirable for low risk, but play a subordinate role compared to LDL.
- HDL Cholesterol ("good" cholesterol): Transports cholesterol from the arteries back to the liver. Higher values are protective.
- Men: ? 40 mg/dl (? 1.0 mmol/l)
- Women: ? 45 mg/dl (? 1.2 mmol/l)
There is no upper limit; very high values are not always beneficial. - Triglycerides: Neutral fats, often elevated with overweight, diabetes, or high alcohol consumption.
- Desirable: < 150 mg/dl (< 1.7 mmol/l)
- Borderline: 150–199 mg/dl
- High: ? 200 mg/dl (increased risk, especially with low HDL)
Risk categories consider age, sex, smoking, blood pressure, diabetes, pre-existing conditions, and other factors. In Germany, professional societies recommend an individual risk assessment; very high values (e.g., LDL > 190 mg/dl) often indicate familial hypercholesterolemia and require early evaluation.
Elevated levels affect a large portion of the population in Germany, especially from middle age onwards. Normalization or significant reduction often halves the risk of cardiovascular events.
What diet can lower cholesterol levels?
Lifestyle measures, especially diet, are the first step and can lower LDL cholesterol by 10–30%, depending on the baseline value and implementation. Guidelines emphasize a calorie-conscious, heart-healthy diet with a focus on fat quality, fiber, and plant-based foods. The effect, with consistent implementation, is comparable to low-dose statins, but often not sufficient on its own in high-risk cases.
Proven evidence-based approaches:
- Reduce saturated and trans fats: Saturated fats (animal products like butter, fatty meat, sausage, cream, cheese, palm and coconut oil) and trans fats (processed baked goods, fried foods) are the most LDL-raising. Reduce these to < 10% (ideally < 7%) of total energy. Replace with unsaturated fats.
- Increase unsaturated fats: Prefer monounsaturated (olive oil, canola oil, avocados, nuts) and polyunsaturated fats (fatty sea fish like salmon, mackerel, herring; flaxseed oil, walnut oil). Omega-3-rich fish lower triglycerides and protect the heart.
- Increase fiber-rich foods: Soluble fibers (β-glucans in oats, barley; pectins in apples, pears; in legumes, vegetables) bind bile acids and promote cholesterol excretion. At least 25–30 g of fiber daily; whole grains, lentils, beans, and oatmeal have proven LDL-lowering effects.
- Plant sterols and stanols: In fortified products (e.g., certain margarines, yogurt), they block cholesterol absorption in the intestine. 2 g daily can lower LDL by 8–10%.
- Prioritize the Mediterranean diet: Rich in vegetables, fruits, whole grains, legumes, nuts, fish, olive oil; low in red/processed meat and sweets. Lowers LDL, triglycerides, and overall risk by up to 30–50% in studies.
- Reduce sugar and sugary drinks: Promote triglycerides and overweight. Avoid soft drinks, sweets; drink water and unsweetened teas instead.
- Weight loss for overweight individuals: Even a 5–10% weight loss noticeably improves the lipid profile, especially with abdominal fat.
Additional tips: Control portions, eat regular meals, moderate exercise for at least 150 minutes per week (e.g., brisk walking). Moderate alcohol consumption (max. 10–20 g/day); better to avoid if triglycerides are high. Supplements (vitamins, antioxidants) are not recommended for cholesterol lowering, as there is no evidence of cardiovascular benefit.
Combined with not smoking and blood pressure control, the effects are amplified. In intervention studies, values normalize or improve in many affected individuals through lifestyle changes alone.
Conclusion and Recommendations
Elevated cholesterol levels are common but manageable. LDL cholesterol is the key parameter – depending on the risk, strict targets apply, down to below 55 mg/dl. Dietary changes (less saturated fat, more fiber, Mediterranean diet) effectively lower levels and reduce cardiovascular risk in the long term. Start with achievable steps: oats for breakfast, olive oil instead of butter, more vegetables and fish. Have your levels checked regularly and discuss your individual risk and, if necessary, medication (e.g., statins) with your doctor. Early and consistent action protects your blood vessels long-term – for a longer, healthier life.
