Desirable total cholesterol is under 200 mg/dL (under 5.2 mmol/L). Levels of 200–239 mg/dL (5.2–6.2 mmol/L) are considered borderline high, and 240 mg/dL (6.2 mmol/L) or above is high. Targets may vary with individual risk factors and treatment goals; discuss personalized targets with your clinician. Routine screening and lifestyle measures—diet, exercise, and smoking cessation—help manage cholesterol.

High total cholesterol increases atherosclerosis risk: fatty plaques build up in artery walls, narrowing vessels and reducing blood flow. That raises risk of coronary artery disease, angina, heart attack, stroke and peripheral artery disease. Over time, uncontrolled cholesterol can cause chronic heart damage and reduced organ function. Lifestyle changes and medications can lower cholesterol and cut these cardiovascular risks.

Yes. Total cholesterol equals HDL + LDL + VLDL (VLDL is often estimated as triglycerides/5), so it includes both HDL (protective) and LDL (atherogenic). Total cholesterol alone doesn’t show the balance of good versus bad lipoproteins — clinicians also look at LDL, HDL, triglycerides, non‑HDL cholesterol and ratios to assess cardiovascular risk. The VLDL estimate assumes fasting blood and may be inaccurate with very high triglycerides.

High cholesterol in children is caused by inherited conditions (familial hypercholesterolemia), unhealthy diets high in saturated and trans fats, excess weight and inactivity, and certain medical problems (diabetes, hypothyroidism, kidney disease) or medications. Family history, poor eating patterns, and lack of exercise are major contributors. Early recognition allows lifestyle changes and treatment to reduce future heart disease risk.

Lower total cholesterol by adopting a heart-healthy diet: reduce saturated and trans fats, eat more soluble fiber (oats, beans, fruits), increase vegetables, nuts, fatty fish, and plant sterols. Maintain healthy weight, exercise (150 min/week moderate), quit smoking, limit alcohol, and control blood pressure and diabetes. If lifestyle changes aren’t enough, discuss statins or other medications with your clinician and get regular lipid checks.

Drinking water does not directly lower LDL cholesterol. Adequate hydration supports metabolism and helps with weight management; replacing sugary drinks with water can reduce calorie intake and may improve triglycerides and overall lipid profile over time. Long-term cholesterol control depends on diet, exercise, and, when needed, medications. Discuss personalised strategies with your healthcare provider.