Can I eat durian before having a blood test for a complete blood count?
Generally, it is not recommended to eat durian before having blood drawn for a complete blood count (CBC). The detailed explanation is as follows:

Durian contains relatively high levels of sugar. If the CBC includes blood glucose testing, and the patient has diabetes or needs to monitor fasting blood glucose levels, consuming durian before the blood draw may lead to elevated blood sugar levels. Additionally, components in durian may affect liver metabolism to some extent. Although this effect is usually minor and may not necessarily appear in a CBC, consuming large amounts of durian before the blood draw might interfere with the test results. Moreover, if the patient is allergic to durian, eating it before the blood draw could trigger an allergic reaction, potentially affecting the CBC results—for example, by increasing the white blood cell count.
It is recommended to consult with a doctor or healthcare professional before blood collection and follow their instructions for preparation, to ensure accurate test results and personal health safety. In daily life, maintaining a balanced diet and healthy lifestyle habits, and avoiding excessive consumption of high-sugar and high-fat foods, can help maintain good blood health.