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"A large 10-year study found that half of all fatal heart disease cases and a quarter of all non-fatal cases are linked to being overweight and having a high body mass index (BMI) or large waist. Body mass index and waist circumference are well known risk factors for cardiovascular diseases but the Dutch researchers said their work showed BMI and waist size could actually help predict the risk of dying from or developing heart disease."

Plasma 25-hydroxyvitamin d is associated with markers of the insulin resistant phenotype in nondiabetic adults. Liu E, Meigs JB, Pittas AG, McKeown NM, Economos CD, Booth SL, Jacques PF. J Nutr. 2009 Feb;139(2):329-34. Epub 2008 Dec 23. PMID: 19106328 doi:10.3945/jn.108.093831 After adjusting for age and sex, plasma 25(OH)D was positively associated with ISI(0,120), plasma adiponectin, and HDL cholesterol and inversely associated with plasma triacylglycerol, but these associations were no longer significant after further adjustment for BMI, waist circumference, and current smoking status. 25(OH)D and 2-h post-OGTT glucose were not associated. Among adults without diabetes, vitamin D status was inversely associated with surrogate fasting measures of insulin resistance. These results suggest that vitamin D status may be an important determinant for type 2 diabetes mellitus.

A Palaeolithic diet improves glucose tolerance more than a Mediterranean-like diet in individuals with ischaemic heart disease. Lindeberg S, Jönsson T, Granfeldt Y, Borgstrand E, Soffman J, Sjöström K, Ahrén B. Diabetologia. 2007 Sep;50(9):1795-807. Epub 2007 Jun 22. PMID: 17583796 DOI: 10.1007/s00125-007-0716-y Conclusions/interpretation A Palaeolithic diet may improve glucose tolerance independently of decreased waist circumference.