Total Cholesterol
Sum of all cholesterol fractions in the blood – entry point into the lipid profile
Also known as
Definition
Total cholesterol is the sum of all cholesterol fractions in the blood: LDL cholesterol (~70%), HDL cholesterol (~20%), and VLDL cholesterol (~10%). Cholesterol is essential for cell membranes, steroid hormone synthesis, vitamin D production, and bile acid formation. As a standalone marker, total cholesterol is less informative than a full lipid profile, since a high value may be driven by favorable HDL.
| Parameter | Value |
|---|---|
| Unit | mmol/l (mg/dl) |
| Reference Range | Desirable: < 5.2 mmol/l (< 200 mg/dl) | Borderline: 5.2–6.2 mmol/l (200–240 mg/dl) | High: > 6.2 mmol/l (> 240 mg/dl) |
| Optimal Range (lab2go) | 4.5–5.5 mmol/l (lab2go Optimum Zone — total cholesterol alone is minimally informative; more important is LDL < 3.0 mmol/l + high HDL) |
Conversion: 1 mmol/l = 38.67 mg/dl. US labs report in mg/dl (desirable < 200 mg/dl).
↓ What a low value means
Total cholesterol < 3.0 mmol/l (< 116 mg/dl) occurs in severe malnutrition, hyperthyroidism, severe liver disease, or malabsorption. Extremely low values (< 2.5 mmol/l) are associated with elevated total mortality, depression, and hemorrhagic stroke.
↑ What a high value means
Hypercholesterolemia increases atherosclerosis risk, though the predictive value of total cholesterol alone is limited. Familial hypercholesterolemia (FH): total cholesterol > 7.5 mmol/l. Secondary causes: hypothyroidism, kidney disease, diabetes, obesity, high saturated fat diet.
✓ How to optimize this marker
Diet: Mediterranean diet, oats (beta-glucan), plant sterols (~2 g/day lower LDL by ~10%), omega-3 fatty acids. Exercise raises HDL. Smoking cessation. Weight reduction. Statins for high cardiovascular risk despite lifestyle change. Optimizing total cholesterol alone has little benefit without evaluating individual fractions.
When to test
Fasting lipid profile every 5 years from age 35 (cardiology recommendation); earlier with family heart disease history, diabetes, hypertension, or obesity. Always with LDL, HDL, triglycerides, and ideally ApoB for complete risk assessment.
Frequently asked questions
Is it true that high total cholesterol is not necessarily bad? +
Conditionally yes. High total cholesterol from high HDL ('good cholesterol') is viewed differently than high total cholesterol from elevated LDL. The TC/HDL ratio (< 3.5 desirable) and especially ApoB are better risk markers than total cholesterol alone. Some FH patients with LDL > 5 mmol/l simultaneously have elevated HDL.
Which foods really raise cholesterol? +
Saturated fatty acids (red meat, butter, coconut fat, palm oil) raise LDL cholesterol most strongly. Trans fats (industrially hydrogenated) raise LDL and lower HDL. Dietary cholesterol (eggs) has minimal effect in most people — genetic 'hyper-responders' react more strongly.
Does coffee raise cholesterol? +
Filtered coffee has minimal effect on cholesterol. Unfiltered coffee (French press, espresso, boiled coffee) contains cafestol and kahweol — diterpenes that can significantly raise LDL cholesterol (up to +20% with high consumption). The strongest effect is seen with boiled coffee.
Sources
Last Reviewed: May 28, 2026 · sina
This information is for orientation only and does not replace medical advice. Reference ranges can vary by laboratory, method and country.