Is it necessary to fast before a liver function test?

Dec 30, 2024 Source: Cainiu Health

Dr. Gao Jun

Introduction

When undergoing liver function tests, it is generally necessary to remain fasting to ensure the accuracy of the test results. After eating, food is metabolized by the liver, which may cause changes in the concentration of certain components in the blood. Particularly after consuming high-protein or high-fat meals, liver enzymes such as transaminases and serum proteins may increase, potentially leading to inaccurate test results.

Generally, a liver function test requires fasting. The detailed explanation is as follows:

After eating, food is metabolized by the liver, and some nutrients may enter the bloodstream, potentially altering blood concentration and even affecting blood quality. Moreover, consuming high-protein or high-fat foods might cause elevated levels of alkaline phosphatase, gamma-glutamyl transferase (GGT), other transaminases, and serum proteins in the liver, which could interfere with the accuracy of the test results. Therefore, it is usually recommended to fast for 8–12 hours before the test to ensure accurate results.

In addition to fasting, patients should also control their physical activity before undergoing a liver function test and avoid strenuous exercise such as running or jumping rope. Furthermore, regular monitoring is necessary after the test, and any discomfort should be promptly reported to a physician.

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How much does a liver function test cost at a hospital?

The cost of liver function tests typically ranges from 50 to 500 yuan per session, but the exact price may be affected by factors such as specific test items, regional living expenses, individual circumstances, discounts for special groups, and hospital promotional activities. Basic tests are less expensive, while comprehensive panels cost more. Testing fees tend to be lower in areas with a lower cost of living and higher in more expensive regions. Patients with medical insurance usually pay less due to higher reimbursement rates, whereas those without insurance may face higher costs.

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How much does a liver function test cost?

The cost of liver function tests may range from 100 to 500 yuan per session, but it could be affected by factors such as the specific test items, testing methods, regional differences, additional services, and special circumstances. Generally, basic tests, traditional methods, cities of lower tiers, and absence of special circumstances may result in lower costs. Conversely, the costs may increase.

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Is a liver function test done by drawing blood?

Under normal circumstances, a blood sample needs to be drawn to test liver function. It is important to maintain good lifestyle habits, ensure adequate sleep, and reduce the frequency of staying up late and alcohol consumption to alleviate the burden on the liver. At the same time, maintaining a balanced diet with proper nutrition, consuming more fresh vegetables and fruits, and reducing intake of greasy, high-calorie, and high-fat foods can help maintain normal liver function.

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How much does a liver function test cost at the hospital?

The cost of liver function tests typically ranges from 50 to 500 yuan per session, but the exact price may vary depending on factors such as the type of examination, regional differences, urgency, special populations, and promotional offers. Regardless of the price, decisions should be made based on individual circumstances, and tests should be conducted at正规 hospitals to ensure accuracy.