How can I test to see if my blood sugar increases in response to ingesting x?

You’ll need a blood glucometer to test the glucose in your blood, and you are going to chart a Glucose curve in response to that food.

1. Start at least 2 hours after your last food (4 if you are type 2 diabetic), and at least 2 hours after you have woken up.  
2. Take a Time 0 measurement – this is your baseline.  
3. Eat the food in question, and set your alarm to 30 mins.
4. Take a Time 30 measurement – this is your glucose spike from that food
5. Take a Time 60 measurement – this should show your glucose coming back to baseline
6. If not at baseline take another test every hour until you are close to your baseline