TC/HDL Ratio


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Lipid tests measure blood levels of total cholesterol, HDL (good cholesterol), non-HDL cholesterol, and sometimes triglycerides. These tests help assess the risk of heart disease. It's vital for adults, especially those with heart disease risk factors, to get tested. Preparation often involves fasting for 10-14 hours. Results include various measurements, with specific levels indicating healthy or high cholesterol. The ratio of total cholesterol to HDL can also be calculated, providing further insights into heart disease risk. Discussing results with a healthcare professional is crucial for understanding and managing cholesterol levels effectively.

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Purpose of the test

Cholesterol tests aim to measure the levels of different types of cholesterol in the blood. This includes total cholesterol, HDL (good cholesterol), non-HDL cholesterol (which encompasses all the 'bad' cholesterol types), and sometimes triglycerides. The ratio of total cholesterol to HDL cholesterol (TC:HDL ratio) can also be determined. This ratio provides insights into one's risk for heart disease. The objective is to ensure that cholesterol levels are within the recommended range to prevent cardiovascular diseases and other related health issues.

Who Should Get Tested

Everyone, especially adults, should be aware of their cholesterol levels. Regular cholesterol testing is crucial for individuals with risk factors for heart disease, such as a family history of heart disease, high blood pressure, smoking, obesity, or other health conditions like diabetes. Women may experience changes in cholesterol levels during pregnancy and menopause, so they should be tested accordingly. It's also essential for those who have a history of high cholesterol or are on cholesterol-lowering medications.

Blood Test Preparation Guidelines
Time of day
It is recommended to schedule your appointment for blood tests in the morning hours between 7:00-10:00.
It is recommended to fast for approximately 12 hours before blood sampling. The last meal of the previous day should ideally be consumed around 6:00 p.m. On the day before the test, avoid heavy and fatty meals as well as alcohol.
Stay hydrated
Drinking water prior to testing can help with sample collection.
Other factors
Tests should not be performed after a sleepless night or intense physical activity. It is recommended to avoid exercise and stress immediately before blood collection and to not smoke. A short rest is recommended.
Medications and supplements:
Blood samples should be collected before the morning dose. Some drugs can interfere with test results. Consult with your doctor whether you can delay your dose because of lab tests.
Biotin supplements:
High doses of biotin supplements can affect test results, causing false elevation or reduction. It's recommended to avoid taking biotin for at least 72 hours before blood collection. If you are taking biotin, inform the personnel collecting the blood so that they can provide specific instructions.
Interpreting Test Results

Cholesterol test results will include various measurements. A healthy total cholesterol level is below 5.0 mmol/L. HDL cholesterol levels should ideally be above 1.0 mmol/L for men and above 1.2 mmol/L for women. The TC:HDL ratio should be as low as possible, with anything above 6 considered high. Non-HDL cholesterol should be below 4.0 mmol/L. If triglycerides are measured, fasting levels should ideally be below 1.7mmol/L. It's essential to discuss the results with a healthcare professional to understand their implications and get recommendations for any necessary lifestyle changes or treatments.

AI-Powered Insights and Expert Validation
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Expert Doctor Confirmation
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Language Model and Trusted Sources
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