MY SUGAR LEVEL IS LOW AFTER HAVING FOOD. FASTING SUGAR IS PERFECT BUT AFTER TAKING FOOD IT IS DIPPING. I HAVE DONE ALL TESTS INCLUDING G.T.T. AND RESULTS ARE SUGAR F 93 AND 1/2 HOUR AFTER TAKING 75 GM GLUCOSE IT IS 105, 1 HR.-76, 1.5 HR.-75, 2 HR. -75, 2.5 HR.-68, 3 HR.-67. INSULIN FASTING IS 4.9. C-PEPTIDE TEST IS .76 (NORMAL RANGE 1.10 -5.0). ALL OTHER TESTS LIKE LFT, KFT,ESR, CBC, THYROID, U/SOUND WHOLE ABDOMEN ARE NORMAL. DOCTORS ARE NOT ABLE TO DIAGNOSE THE EXACT CAUSE. WHEN MY SUGAR LEVEL GOES DOWN I FEEL ALL SYMPTOMS OF LOW BLOOD SUGAR LEVEL. PLEASE ADVICE WHAT CAN BE THE EXACT CAUSE OF THIS KIND OF A PROBLEM.