How Smoking and Alcohol Impact Blood Test Accuracy

Explore how smoking and drinking can alter blood test results, leading to incorrect diagnoses and concerns.

Lifestyle Habits Matter

Lifestyle Habits Matter

Smoking and alcohol consumption can significantly skew blood test results, leading to misdiagnosis or unnecessary concern.

Alcohol Disrupts Liver Function Tests

Alcohol Disrupts Liver Function Tests

Drinking before a test elevates liver enzymes, possibly indicating liver damage.

GGT: The Alcohol Red Flag

GGT: The Alcohol Red Flag

GGT levels spike after moderate drinking, marking it a sensitive indicator for recent alcohol intake.

Triglycerides Can Spike

Triglycerides Can Spike

Alcohol increases triglyceride levels, distorting lipid profile results and cardiovascular assessments.

Chronic Alcohol Use Alters Blood Cells

Chronic Alcohol Use Alters Blood Cells

High MCV in a CBC may indicate long-term alcohol use due to bone marrow toxicity.

Direct Alcohol Detection Tests Exist

Direct Alcohol Detection Tests Exist

EtG and PEth tests can detect alcohol for up to 3 weeks after drinking.

Smoking Triggers Inflammatory Markers

Smoking Triggers Inflammatory Markers

Smokers often show elevated blood levels that may mimic infection or other conditions.

CEA: A Tumor Marker Affected by Smoking

CEA: A Tumor Marker Affected by Smoking

Smoking raises CEA levels, potentially causing false positives in cancer screenings.

Pre-Test Abstinence is Crucial

Avoid alcohol for 24–72 hours and smoking for 8–12 hours before a blood test for accuracy.