## Abstract Adequate analytical tools are required for labelling food products for __trans__ fatty acid (TFA) contents. The choice of the fatty acid (FA) derivatisation is a crucial step in obtaining good results, in particular with shortβchain and conjugated FA. Several gas chromatographic and inf
Trans fatty acid content of foods and intake levels in France
β Scribed by Laurent Laloux; Laure du Chaffaut; Landy Razanamahefa; Lionel Lafay
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 211 KB
- Volume
- 109
- Category
- Article
- ISSN
- 1438-7697
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β¦ Synopsis
Abstract
As a preliminary for recommended trans fatty acid (TFA) consumption levels as regards health, it was essential to estimate the TFA intake level. Recent results of TFA content of foods were collected, and the total TFA, 18:1 TFA, 18:2 TFA and total conjugated linoleic acid (CLA) compositions were recorded for around 900β food items. These results were combined with the latest consumption data in France in order to update the TFA intake level in France. Average daily total TFA intake was about 3.0 and 3.4β g/day in boys and men, and about 2.7 and 2.8β g/day in girls and women, respectively. The same tendency was observed for TFA 18:1 intake (boys 2.1β g/day, men 2.4β g/day, girls 1.9β g/day, women 2.0β g/day) and for TFA 18:2 (boys 0.2β g/day, men 0.24β g/day, girls 0.18β g/day, women 0.18β g/day). For CLA, the mean daily intake was higher in males than in females for both adults (0.21β g/day vs. 0.18β g/day) and children (0.18β g/day vs. 0.17β g/day). Foods of animal origin (dairy products and meat from ruminants) were the main contributors of total TFA, accounting for 60% of the identified TFA. Dairy products were the main contributors of total CLA, accounting for 70% of the identified CLA. In other words, manufactured pastries, biscuits, ready meals and chocolate bars accounted for 40% of total TFA and 30% of CLA.
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Seventeen commercial samples of German margarines were analyzed by gas-liquid chromatography for the trans fatty acid (TFA) content including the following mixture of geometrical and positional isomers: and trans-isomers. Conventional vegetable and fat reduced margarines were found to contain 0.3-4