12 January - 20 June 2016

Vitamin D and obesity

19 June 13

A long term study in Spain into the relationship between obesity and vitamin D has been reported in European Journal of Clinical Nutrition.  The so-called Pizarra study was a prospective, population-based study undertaken in southern Spain. The baseline study was undertaken during 1996–1998, with the inclusion of 1226 subjects. Of the initial cohort, 988 subjects were re-evaluated in 2002–2004, and 961 subjects were re-evaluated later in 2005–2007. At both the baseline and the follow-up visits, all the participants underwent an interview and a standardized clinical examination. Measurements were made of weight, height, waist and hip circumferences. The BMI was calculated as weight in kg divided by the square of the height in metres. A BMI greater than or equal to 30 kg/m2 was considered as obese. The same methodology was used for the baseline and the follow-up studies. Blood samples were also taken. The results suggested that lower 25-hydroxyvitamin D values in obese subjects may not have been secondary to obesity, but may precede obesity. Similar studies have reported a high prevalence of vitamin D deficiency in obese subjects, as well as significantly lower 25-hydroxyvitamin D values in obese than in non-obese subjects. The Spanish group claims this relationship disappears after the model is adjusted for sex, age, season, iPTH values and the diagnosis of diabetes. Thus, whilst the cause and effect relationship between obesity and vitamin D still remains unclear, the Spanish study supports the idea that vitamin D deficiency disposes an individual towards obesity.

RSSL's Functional Ingredients Laboratory provides vitamin analysis in a wide range of matrices including drinks, fortified foods, pre-mixes and multi-vitamin tablets, including the analysis for  Vitamin D2 and Vitamin D3.  It provides a full vitamin and mineral analysis service to assist with labelling, due diligence, claim substantiation and stability. For more information please contact Customer Services on Freephone 0800 243482 or email enquiries@rssl.com

share this article
RSSL endeavours to check the veracity of news stories cited in this free e-mail bulletin by referring to the primary source, but cannot be held responsible for inaccuracies in the articles so published. RSSL provides links to other World Wide Web sites as a convenience to users, but cannot be held responsible for the content or availability of these sites. This document may be copied and distributed provided the source is cited as RSSL's Food e-News and the information so distributed is not used for profit.

Previous editions

Load more editions

Make an Enquiry