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Am J Clin Nutr. 2015 Oct;102(4):922-32. doi: 10.3945/ajcn.115.113613. Epub 2015 Aug 12.

Paleolithic nutrition for metabolic syndrome: systematic review and meta-analysis.

Author information

1
Bahrain Branch of Cochrane, Awali, Bahrain; and emanheimer@ebsco.com.
2
Departments of Dermatology and.
3
Bahrain Branch of Cochrane, Awali, Bahrain; and.
4
Internal Medicine, Section Endocrinology, Leiden University Medical Centre, Leiden, Netherlands.

Abstract

BACKGROUND:

Paleolithic nutrition, which has attracted substantial public attention lately because of its putative health benefits, differs radically from dietary patterns currently recommended in guidelines, particularly in terms of its recommendation to exclude grains, dairy, and nutritional products of industry.

OBJECTIVE:

We evaluated whether a Paleolithic nutritional pattern improves risk factors for chronic disease more than do other dietary interventions.

DESIGN:

We conducted a systematic review of randomized controlled trials (RCTs) that compared the Paleolithic nutritional pattern with any other dietary pattern in participants with one or more of the 5 components of metabolic syndrome. Two reviewers independently extracted study data and assessed risk of bias. Outcome data were extracted from the first measurement time point (≤6 mo). A random-effects model was used to estimate the average intervention effect. The quality of the evidence was rated with the use of the Grading of Recommendations Assessment, Development and Evaluation approach.

RESULTS:

Four RCTs that involved 159 participants were included. The 4 control diets were based on distinct national nutrition guidelines but were broadly similar. Paleolithic nutrition resulted in greater short-term improvements than did the control diets (random-effects model) for waist circumference (mean difference: -2.38 cm; 95% CI: -4.73, -0.04 cm), triglycerides (-0.40 mmol/L; 95% CI: -0.76, -0.04 mmol/L), systolic blood pressure (-3.64 mm Hg; 95% CI: -7.36, 0.08 mm Hg), diastolic blood pressure (-2.48 mm Hg; 95% CI: -4.98, 0.02 mm Hg), HDL cholesterol (0.12 mmol/L; 95% CI: -0.03, 0.28 mmol/L), and fasting blood sugar (-0.16 mmol/L; 95% CI: -0.44, 0.11 mmol/L). The quality of the evidence for each of the 5 metabolic components was moderate. The home-delivery (n = 1) and dietary recommendation (n = 3) RCTs showed similar effects with the exception of greater improvements in triglycerides relative to the control with the home delivery. None of the RCTs evaluated an improvement in quality of life.

CONCLUSIONS:

The Paleolithic diet resulted in greater short-term improvements in metabolic syndrome components than did guideline-based control diets. The available data warrant additional evaluations of the health benefits of Paleolithic nutrition. This systematic review was registered at PROSPERO (www.crd.york.ac.uk/PROSPERO) as CRD42014015119.

KEYWORDS:

GRADE; Paleolithic diet; cardiovascular risk; meta-analysis; metabolic syndrome; randomized controlled trials; systematic review

Comment in

PMID:
26269362
PMCID:
PMC4588744
DOI:
10.3945/ajcn.115.113613
[Indexed for MEDLINE]
Free PMC Article

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