I am answering this question with respect to type 1 diabetes.
But the answer is yes, one can do that but there are consequences.
Insulin is expensive.
Excess use of insulin can lead to insulin resistance, which can lead to type 2 diabetes
overlying type 1 diabetes. That usually means more insulin is required.
Such habits will lead to significant weight gain. Insulin doesn t destroy glucose, it causes
it to be stored, frequently as fat.
Excess consumption of carbohydrates, like sugar, will make it more difficult to keep
blood glucose in the normal range.
This will lead to some serious health consequences.
Yes, a diabetic can account for an occasional candy bar with a higher bolus of insulin.
But it should be a very rare occasion and not something that is done every day.
Insulin should be a part of good blood glucose control along with diet and exercise. And
that should be part of a plan set up by an endocrinologist and diabetic nutritionist, not
amateurs.
More info...
https://www.quora.com/Can-a-diabetic-eat-a-lot-of-sugar-and-just-take-more-insulin
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