Individuals on a ketogenic diet may fail an oral glucose tolerance test (OGTT) if they consume carbohydrates within 24-72 hours prior.

“if you take these people like you take someone on a ketogenic diet and we need to get into this and actually clarify what we're talking about here with this glucose oh and you feed them carbohydrates for 24 to 72 hours they will ace a hyperglycemic a you glycemic hyperinsulinemic clamp they will they were a Sano GTT because what is happening here and I'll just go ahead and explain this to people so in slow carbohydrate diet states and there are papers which show that pregnant mothers who undergo OG TTS oral glucose-tolerance test which are not you glycemic hyperinsulinemic clamps but they are a big bolus of glucose in the form of a glue Cola solution they can fail these if they have a low carb meal the night before”