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Mol Nutr Food Res. 2018 Nov 14:e1800512. doi: 10.1002/mnfr.201800512. [Epub ahead of print]

Body Mass Index as a Determinant of Systemic Exposure to Gallotannin Metabolites during 6-Week Consumption of Mango (Mangifera indica L.) and Modulation of Intestinal Microbiota in Lean and Obese Individuals.

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Department of Nutrition and Food Science, Texas A&M University, College Station, 77843, TX, USA.
Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, 77843, TX, USA.
Center for Translational Research in Aging and Longevity, Department of Health and Kinesiology, Texas A&M University, College Station, 77843, TX, USA.
Therapeutic Microbiology Laboratory, Department of Molecular Virology and Microbiology, Alkek Center for Metagenomics and Microbiome Research, Baylor College of Medicine, Houston, 77030, TX, USA.



This human clinical pilot trial investigated pharmacokinetics of gallotannin-metabolites and modulation of intestinal microbiota in healthy lean and obese individuals after 6 weeks of daily mango consumption.


Participants are divided into three groups: Lean Mango (LM: n = 12; BMI = 22.9 kg m-2 ), Obese Mango (OM: n = 9; BMI = 34.6 kg m-2 ), and Lean Control (LC: n = 11; BMI = 22.1 kg m-2 ). LM and OM consumed 400 g of mango per day for 6 weeks. LC consumed mango only on Days 0 and 42. After 6 weeks, LM experienced increased systemic exposure (AUC0-8h ) to gallotannin-metabolites, 1.4-fold (p = 0.043). The greatest increase is 4-O-methyl-gallic acid, 3.3-fold (p = 0.0026). Cumulative urinary excretion of gallotannin-metabolites significantly increased in LM and OM, but not LC. For OM, qPCR data show increased levels of tannase-producing Lactococcus lactis and decreased levels of Clostridium leptum and Bacteroides thetaiotaomicron, bacteria associated with obesity. LM experienced an increased trend of fecal levels of butyric (1.3-fold; p = 0.09) and valeric acids (1.5-fold; p = 0.056). Plasma endotoxins showed a decreased trend in LM and OM.


Continuous mango intake significantly increased systemic exposure to gallotannin- metabolites and induced an increased trend for fecal short-chain fatty acids in lean but not obese individuals. This pharmacokinetic discrepancy may result in BMI-associated reduced gallotannin-derived health benefits.


bioavailability; gallotannins; human clinical intervention; intestinal microbiota; mango


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