Fermented Gold Kiwi Improves Gastrointestinal Motility and Functional Constipation: An Animal Study and Human Randomized Clinical Test
2024
Jihye Choi | Hwal Choi | Yuseong Jang | Hyeon-Gi Paik | Hyuck-Se Kwon | Seon Mi Shin | Jeung Seung Lee | Bumseok Kim | Jungkee Kwon
Constipation is a functional disorder of the gastrointestinal system characterized by difficult bowel movements, infrequent defecation, reduced water content, and hard stools. This study aims to evaluate the preventive effects of fermented gold kiwis (FGK) on loperamide-induced constipation in rats and investigate its efficacy in improving constipation symptoms in human patients through a randomized clinical trial. In the animal study, FGK was administered orally at doses of 50, 125, and 250 mg/kg to constipated rats for two weeks, resulting in significant improvements in constipation parameters. FGK increased serum serotonin and acetylcholine levels and suppressed increases in serum dopamine concentration. FGK also upregulated mRNA expression of the serotonin-synthesizing receptors 5-HT3R and 5-HT4R and suppressed the expression of the dopamine 2-receptor (D2R) in the duodenum. Furthermore, FGK inhibited inflammatory cytokines such as tumor necrosis factor (TNF)-&alpha:, interleukin (IL)-1&beta:, and IL-6. In the clinical trials, the improvement in constipation symptoms was evaluated using the gastrointestinal symptom rating scale (GSRS). Clinical trial participants reported significant improvements in constipation symptoms after receiving FGK. These findings suggest that FGK effectively relieves constipation in both animals and humans, indicating its potential as an effective dietary supplement.
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