how long should you fast before a glucose tolerance test
Generally, before a lipid or a glucose tolerance test, youâll be told to fast for eight hours. However, your healthcare provider may advise you differently. Always follow his/her instructions to the letter.enerally, before a lipid or a glucose tolerance test, youâll be told to fast for eight hours. However, your healthcare provider may advise you differently. Always follow his/her instructions to the letter.