PCP has recommended glucose tolerance test to determine if low sugar

was the culprit of collapse - episodes of severe weakness, dizziness, difficulty in breating... My blood work came back all normal including protein. PCP has ruled out low protein and suggested this BG test. I am concerned since we are not suppose to have sugar (had roux-en-y 8 months ago). In addition, even if tolerance is abnormally low, what could be done for me anyway? What does one do to raise blood glucose levels? Eat sweets? Have sent a message to my surgeon and am hopeful he will comment and advise me .... in the meantime, any suggestions would be appreciated. Thank you.

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