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This elevated level for many days, actually suggests it's not an intake problem:

> Witkowski et al. note that the vast majority of their study participants were enrolled prior to erythritol becoming a common sweetener and food additive. This, combined with the authors’ finding that erythritol levels remain well above the cohort ranges for at least a day after consumption, suggests that none of the cohort patients were consuming erythritol in their diets, and that the levels measured in fasting plasma samples were instead the result of endogenous production

[1] https://peterattiamd.com/more-hype-than-substance-erythritol...