Hi Susanne and Martine Aren't all fatty acids organic acids? For me the difference is in the chain length. I'd only calculate the energy content with the fat-factor if the chain length is >4C. For acetic acid I would use the factor for organic acids as it has a chain length of 2C. Best wishes and have a nice day! Esther Esther Infanger Projektleiterin Dipl. Ernährungsberaterin FH, Master of Nutrition UC Schweizerische Gesellschaft für Ernährung SGE Schwarztorstrasse 87 | Postfach 8333 | CH-3001 Bern T +41 31 385 00 15 | F +41 31 385 00 05 Wissen, was essen. http://www.sge-ssn.ch<http://www.sge-ssn.ch/> [f_logo]<http://www.facebook.com/sgessn>_Besuchen Sie uns auf Facebook<http://www.facebook.com/sgessn> Von: Food Composition Discussion Group [mailto:[log in to unmask]] Im Auftrag von Susanne Westenbrink Gesendet: Dienstag, 21. Januar 2014 14:34 An: [log in to unmask] Betreff: energy factor for acetic acid? Dear all, We have got a question concerning acetic acid. In the EuroFIR thesaurus this acid is assigned to the organic acids, but with the synonym: fatty acid C2:0. Our question is: how to deal with the energy calculation if a food, for instance vinegar, contains acetic acid. Is the amount of acetic acid multiplied by the energy factor for fat or for organic acids? Does any of you know more about the energy from acetic acid? And how did you deal with this in your food composition databases? Kind regards, Martine Jansen en Susanne Westenbrink Susanne Westenbrink Rijksinstituut voor Volksgezondheid en Milieu (RIVM) / National Institute for Public Health and the Environment Centrum voor Voeding, Preventie en Zorg / Centre for Nutrition, Prevention and Health Services PO Box 1 3720 BA Bilthoven The Netherlands tel: +31 (0) 30 274 2448 fax: +31 (0) 30 274 4466 e-mail: [log in to unmask]<mailto:[log in to unmask]> for more information on the Dutch food composition database see http://www.rivm.nl/nevo http://nevo-online.rivm.nl<http://nevo-online.rivm.nl/> Proclaimer RIVM http://www.rivm.nl/Proclaimer<http://www.rivm.nl/Proclaimer> ________________________________ To unsubscribe from the InFoods-Food-Comp-L list, click the following link: https://listserv.fao.org/cgi-bin/wa?SUBED1=InFoods-Food-Comp-L&A=1 ######################################################################## To unsubscribe from the InFoods-Food-Comp-L list, click the following link: https://listserv.fao.org/cgi-bin/wa?SUBED1=InFoods-Food-Comp-L&A=1