Recurrent Aphthous Ulceration: Vitamin B1, B2 and B6 Status

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https://pubmed.ncbi.nlm.nih.gov/1941656/

Heathline explains Xylitol

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https://www.healthline.com/nutrition/xylitol-101

WebMD sums up Xylitol

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https://www.webmd.com/vitamins/ai/ingredientmono-996/xylitol