Can you drink herbal tea the night before a fasting blood test ie mint or cranberry tea?

It's best to avoid any herbal teas the night before a fasting blood test, including mint and cranberry tea. Here's why:

* Some herbs can affect blood sugar levels: Some herbs, like ginseng and licorice root, can impact blood sugar levels, which could interfere with the accuracy of your fasting blood test.

* Some herbs can interact with medications: Even if the herb itself doesn't directly affect your blood sugar, it could interact with medications you're taking, potentially causing inaccurate test results.

* Some herbs can have diuretic effects: This can affect the concentration of your blood, leading to inaccurate results.

The safest option is to stick to plain water the night before your test.

Talk to your doctor or the lab technician: If you have any concerns or questions about what you can and can't consume before your fasting blood test, be sure to contact them directly. They can provide you with the most accurate and personalized guidance.