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. 2022 Aug 15;23(16):9160. doi: 10.3390/ijms23169160

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Comparison of serotonin pathway metabolites based on the presence of ulceration. (a) comparison of 5-hydroxyindole-3-acetic acid level relative to tryptophan concentration, based on the presence of ulceration, p = 0.223; (b) comparison of 5,6-dihydroxyindole-2-carboxylic acid level relative to tryptophan concentration, based on the presence of ulceration, p = 0.171; (c) comparison of 5-hydroxyindole-3-acetic acid level relative to 5,6-dihydroxyindole-2-carboxylic acid concentration, based on the presence of ulceration, p = 0.210.