Erythritol
Human Gut Microbiota Does Not Ferment Erythritol
by Eva Arrigoni, Fred Brouns, & Renato Amado
2005

Earlier in vitro experiments showed that erythritol remained unfermented for a fermentation period of 12 h. However, kaking all fermentation parameters into account, erythritol turned out to be completely resistant to bacterial attack within 24h, thus excluding an adaptation within that period.

Since under in vivo conditions more easily fermentable substrates enter the colon continuously, it seems very unlikely that erythritol will be fermented in vivo.

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