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Clin Gastroenterol Hepatol. 2015 Sep;13(9):1625-1632.e1. doi: 10.1016/j.cgh.2015.02.044. Epub 2015 Mar 10.

Differences in Weight Loss Between Persons on Standard Balanced vs Nutrigenetic Diets in a Randomized Controlled Trial.

Author information

1
Division of Endocrinology, University of California, San Diego.
2
School of Medicine, University of California, San Diego.
3
VA San Diego Health System, La Jolla, CA.
4
Department of Psychiatry, University of California, San Diego.
5
Division of Gastroenterology, University of California, San Diego.
#
Contributed equally

Abstract

BACKGROUND & AIMS:

Many companies provide genetic tests for obesity-related polymorphisms (nutrigenetics) and make dietary recommendations for weight loss that are based on the results. We performed a randomized controlled trial to determine whether more participants who followed a nutrigenetic-guided diet lost ≥5% of their body weight than participants on a standard balanced diet for 8 and 24 weeks.

METHODS:

We performed a prospective study of 51 obese or overweight U.S. veterans on an established weight management program at the Veterans Administration San Diego Healthcare System (the MOVE! program). Participants were randomly assigned to groups placed on a nutrigenetic-guided diet (balanced, low-carbohydrate, low-fat, or Mediterranean; n = 30) or a standard balanced diet (n = 21). Nutrigenetic diets were selected on the basis of results from the Pathway FIT test.

RESULTS:

There was no significant difference in the percentage of participants on the balanced diet vs the nutrigenetic-guided diet who lost 5% of their body weight at 8 weeks (35.0% ± 20.9% vs 26.9% ± 17.1%, respectively; P = .28) or at 24 weeks. Both groups had difficulty adhering to the diets. However, adherence to the nutrigenetic-guided diet correlated with weight loss (r = 0.74; P = 4.0 × 10(-5)), but not adherence to standard therapy (r = 0.34; P = .23). Participants who had low-risk polymorphisms for obesity lost more weight than all other participants at 8 weeks (5.0% vs 2.9%, respectively; P = .02) and had significantly greater reductions in body mass index (6.4% vs 3.6%, respectively; P = .03) and waist circumference (6.5% vs 2.6%, respectively; P = .02) at 24 weeks.

CONCLUSIONS:

In a prospective study, a nutrigenetic-based diet did not increase weight loss compared with a standard balanced diet. However, genetic features can identify individuals most likely to benefit from a balanced diet weight loss strategy; these findings require further investigation. ClinicalTrials.gov number: NCT01859403.

KEYWORDS:

BMI; Diet; Nutrigenomics; Personalized Medicine

PMID:
25769412
PMCID:
PMC4546861
DOI:
10.1016/j.cgh.2015.02.044
[Indexed for MEDLINE]
Free PMC Article

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