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A member asked:
Can a canker sore be a sign of a food allergy?
A doctor has provided 1 answer
Canker sore: Canker sores can be caused by a sensitivity to certain chemicals, most commonly SLS, an common ingredient in many toothpastes. Check the labels and try an SLS free toothpaste. Trauma, autoimmune, Vitamin deficiency can also be causes.
Answered 9/19/2016
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