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Re: R: Spaghetti spikes Blood Glucose after 3-7hours. Yes, in these cases (pizza/spaghetti) using an insulin pump is extremely useful. You can split your bolus into 2, 3 or even 4 parts and take the insulin gradually.
An hour after eating the bagel, the concentration of glucose in Suzy's blood might rise to 220 mg/dl, while Tom's blood sugar might rise to 275 mg/dl. During the second hour after eating, Suzy's blood sugar might drift down to 180 mg/dl, while Tom's might keep climbing to 340 mg/dl --a value very close to that which a person would reach if their body produced no insulin at all. During the third hour, Tom's blood sugar might finally start coming down while Suzy's would be close to a normal value.