7 doctors weighed in:
If I brush my teeth during fasting for my A1c test, will it give a false reading?
7 doctors weighed in

Dr. Quang Nguyen
Internal Medicine - Endocrinology
3 doctors agree
In brief: No worries
A1c does not require fasting.
That's the beauty of the test. It's not affected by what you eat before the test.

In brief: No worries
A1c does not require fasting.
That's the beauty of the test. It's not affected by what you eat before the test.
Dr. Quang Nguyen
Dr. Quang Nguyen
Thank
Dr. Guy DaSilva
Preventive Medicine
1 doctor agrees
In brief: HbA1c & toothbrushin
The hemoglobin A1c is a measure of glycation found in blood tests.
It is a combination of sugars meshing with proteins on the cell surface. It determines how your body processed sugar over a three month period. It is not a measure of sugar itself. Therefore, it will not be affected by teeth brushing.

In brief: HbA1c & toothbrushin
The hemoglobin A1c is a measure of glycation found in blood tests.
It is a combination of sugars meshing with proteins on the cell surface. It determines how your body processed sugar over a three month period. It is not a measure of sugar itself. Therefore, it will not be affected by teeth brushing.
Dr. Guy DaSilva
Dr. Guy DaSilva
Thank
Dr. Heidi Nelson
Dentistry
In brief: Not at all
Not at all. The a1c measures blood sugar over a period of time, not the agents in your toothpaste.
The flavoring agents in toothpaste are not sugar in any case. As a side comment, you could brush as effectively with no toothpaste, with mouth rinse or with baking soda and water.

In brief: Not at all
Not at all. The a1c measures blood sugar over a period of time, not the agents in your toothpaste.
The flavoring agents in toothpaste are not sugar in any case. As a side comment, you could brush as effectively with no toothpaste, with mouth rinse or with baking soda and water.
Dr. Heidi Nelson
Dr. Heidi Nelson
Thank
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