Total Cholesterol
Total cholesterol is the sum of LDL + HDL + ~20% of triglycerides. It's a coarse marker — the LDL and HDL fractions matter more than the headline number.
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What it measures
Total cholesterol is what a basic lipid screen measures first. It bundles LDL (atherogenic), HDL (protective) and a fraction of the triglyceride-rich particles into one number. A person can have a high total cholesterol with elevated HDL and a clean lipid profile, or a normal total cholesterol with high LDL and low HDL — same number, very different cardiovascular risk. Modern guidelines focus on LDL or non-HDL cholesterol for risk stratification; total cholesterol is now mostly a screening trigger to order the full panel.
What a high value can mean
- High LDL component — the most common reason total cholesterol is elevated.
- High HDL — paradoxically raises total cholesterol while reducing risk.
- Familial hypercholesterolaemia — values >300 mg/dL warrant genetic evaluation.
- Hypothyroidism, nephrotic syndrome, cholestasis — secondary causes worth excluding.
What a low value can mean
- Severe liver disease — impaired synthesis.
- Hyperthyroidism — accelerated clearance.
- Malnutrition, malabsorption.
- Usually benign or favourable in isolation.
When to discuss with a doctor
Total cholesterol ≥200 mg/dL is the threshold for ordering a full lipid panel (LDL, HDL, triglycerides). Decisions about statin therapy and lifestyle change are made on the FULL panel plus a 10-year cardiovascular risk score — not on total cholesterol alone. Mediora.AI surfaces the breakdown so the headline number is interpreted in context.