how long to fast before blood tests

The typical recommended fasting time before a blood test is 8 to 12 hours. During this fasting period, you should avoid eating and drinking anything except plain water. Some specific tests, such as those for glucose, triglycerides, and iron levels, especially require fasting to ensure accurate results. It is also advised to avoid alcohol for 24 hours before the test and to refrain from smoking, chewing gum, or exercising during the fast. Drinking plenty of water is encouraged to stay hydrated and facilitate blood drawing. Scheduling the blood test early in the morning is preferred so that most of the fasting time occurs during sleep, making it easier to fast. Always follow the specific instructions given by your healthcare provider as fasting requirements may vary depending on the type of blood tests ordered.