Cholesterol Testing Methods: Blood Draw, Fingerstick & Saliva Compared

Cholesterol Testing Options

Method	Procedure	Measures	Accuracy	Use Case
Venous Blood (Standard)	Phlebotomy → lab	Total, LDL-C, HDL-C, TG, non-HDL, apoB	Gold standard	Diagnosis, monitoring, risk assessment
Fingerstick (POC)	Lancet → test strip → analyzer	Total, HDL, TG (calc LDL)	Good (±10–15%)	Screening, health fairs, pharmacy
Saliva	Spit tube → lab	Total cholesterol only	Limited correlation	Research, not clinical standard

Key Factors Affecting Levels

• Diet: Saturated/trans fat ↑LDL; fiber, plant sterols, omega-3 ↓LDL.
• Exercise: Aerobic ↑HDL, ↓TG; resistance training helps.
• Weight: 5–10% loss → significant lipid improvement.
• Smoking: ↓HDL, oxidizes LDL → cessation critical.
• Alcohol: Moderate ↑HDL; excess ↑TG, liver fat.
• Meds: Statins, ezetimibe, PCSK9i ↓LDL; beta-blockers, thiazides, OCPs may ↑TG/↓HDL.
• Conditions: Hypothyroidism, nephrotic syndrome, diabetes ↑LDL/TG.

Fasting Requirements

Traditional: 9–12h fast. Non-fasting now acceptable for screening (TG slightly higher, LDL calculated). Fasting preferred for hypertriglyceridemia monitoring.

Discuss optimal testing strategy with your provider.