…according to an article at American Journal of Clinical Nutrition.
“Metabolic syndrome” may be a new term for you. It’s a collection of clinical features that are associated with increased future risk of type 2 diabetes and atherosclerotic complications such as heart attack and stroke. One in six Americans has metabolic syndrome. Diagnosis requires at least three of the following five conditions:
- high blood pressure (130/85 or higher, or using a high blood pressure medication)
- low HDL cholesterol: under 40 mg/dl (1.03 mmol/l) in a man, under 50 mg/dl (1.28 mmol/l) in a women (or either sex taking a cholesterol-lowering drug)
- triglycerides over 150 mg/dl (1.70 mmol/l) (or taking a cholesterol-lowering drug)
- abdominal fat: waist circumference 40 inches (102 cm) or greater in a man, 35 inches (89 cm) or greater in a woman
fasting blood glucose over 100 mg/dl (5.55 mmol/l)
- fasting blood glucose over 100 mg/dl (5.55 mmol/l)
I don’t plan on reading the full text of the report because it’s a meta-analysis and I’ve likely reviewed the four component studies here already. Here are the results:
Four RCTs [randomized controlled trials] 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.
Ways to improve or cure metabolic syndrome include the paleo diet, Mediterranean diet, low-carb diets, ketogenic diets, and exercise. Losing excess fat weight with any reasonable diet would probably work. Enhance effectiveness with exercise.
Steve Parker, M.D.
Reference:Eric W Manheimer, Esther J van Zuuren, Zbys Fedorowicz, and Hanno Pijl. Paleolithic nutrition for metabolic syndrome: systematic review and meta-analysis. AJCN. First published August 12, 2015, doi: 10.3945/ajcn.115.113613
Thanks for that link, charles. After reading Evelyn’s comments, I’m sorta glad I didn’t take the time to read the meta-analysis.