I have to go to the doctors tomorrow for a blood test , A fasting sugar test so i need to fast but?

I had a blood test yesterday and was told to not to eat and to drink only water for 12 hours, but that was for a cholesterol test

The usual advice is to fast from midnight.

it is enough time to fast, infact you can still have something else before 10pm tonight, tomorrow morning you can only drink water or black tea with no sugar. If you are a smoker do not smoke before the blood test as it affects the levels, after your first blood test you will have to drink some lucozade and wait 2 hours for the next blood test - this is to see the level of your sugar after the drink and on how quick it rises. If the results come back as diabetes you will get a blood test every 6 months and you will get an appointment for the podiatrist and the dietitian every year and the renal specialist for your eyes.

A fasting blood test means not having your breakfast before having this blood test,so not having anything after 12midight,I had this test done to see if I was diabetic( I was)..you could always take a couple of biscuits with you if want or just go home and have your breakfast which I did ,but then I had to go back 2 hours after to do another blood test to see what my sugar levels were after eating breakfast,hope this helps annd good luck

A fasting blood test would mean you not eating overnight, my friend, so 13 hours would be sufficient. The pathology laboratory that I use has a continually running video within the department indicating that they prefer someone who is to have a fasting blood test should not have eaten over the previous 10 hours. As J B states, you should NOT have anything to eat or drink, except for plain water, prior to the blood test being carried out. I wish you well, dear lady.

Fasting means 8 hours or somewhat longer, depending on your appointment time. Fasting is routinely done as part of blood tests. If your father is diabetic they need to know that and should always be included in your history.

JB is correct.

Mea, Fasting blood sugar (FBS) measures blood glucose after you have not eaten for at least 8 hours. It is often the first test done to check for prediabetes and diabetes. As mentioned by many of the answers above, eat or drink nothing after midnight until after you have had your test completed. A result of 70 to 99 mg/dL (3.9 to 5.5 mmol/L) indicates Normal Fasting Glucose. A result showing from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) indicates Impaired Fasting Glucose (pre-diabetes). A result of 126 mg/dL (7.0 mmol/L) and above – and if discovered, this would be tested on more than one future testing occasion – indicates Diabetes. ALL ANSWERS SHOULD BE THOROUGHLY RESEARCHED, IN ANY FORUM AND ESPECIALLY IN THIS ONE. - MANY ANSWERS ARE FLAWED. It is extremely important to obtain an accurate diagnosis before trying to find a cure. Many diseases and conditions share common symptoms. The information provided here should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Hope this helps matador 89