Fraunhofer researchers have developed a method that allows omega-3 fatty acids to be added to popular foods. First fruit of the research is an omega-3 sausage, which is being marketed exclusively through EDEKA stores in Germany.
According to a survey commissioned by EDEKA, Germans know that omega-3 fatty acids are important and that fish contain them in a particularly high-value form - yet neither women nor men eat the recommended weekly amount of 150 to 220 grams of fish.
“We thought that the surest way to solve this problem would be to increase the amount of effective fatty acids in popular foods that people eat in large quantities, such as pizza, pasta, bread, and sausages,” said project manager Dr. Peter Eisner. “First, though, we had to deal with the fish smell issue.”
Omega-3 fatty acids are virtually odourless in their natural form as they occur, for instance, in fresh fish or fish oil. If they come into contact with oxygen, however, they oxidise. The resulting degradation products have two drawbacks: the quality of the original substance diminishes, and a fishy smell is produced. What was needed, said Fraunhofer, was a process that locked in the precious fatty acids and protected them against oxidisation.
“This is what we achieved by means of a special emulsion system,” said Christian Zacherl from the Fraunhofer Institute for Process Engineering and Packaging. “It optimally combines the effects of various anti-oxidants with each other.”
Some of the substances used are directly responsible for oxidisation protection, while others support the effects of the first group, and yet others eliminate substances that accelerate the degradation process in fatty acids.
“The oxygen has to clear a lot of hurdles before it can react with the omega-3 fatty acids. Thanks to our method, the fatty acids remain stable and can be incorporated into a variety of foods. The emulsion can be adapted specifically to individual products. All we have to do, effectively, is vary the number and type of hurdles,” said Zacherl.
The omega-3 sausage was launched in mid-April and is produced in EDEKA meat processing plants.
“The new omega-3 products underscore EDEKA’s nutritional and gourmet expertise. At the same time, the cooperation with Fraunhofer IVV shows that EDEKA is a major driver of innovation in the German food trade,” said Markus Mosa, CEO of EDEKA AG.
The food retailer has included the omega-3 sausage in its own-brand range and is initially offering nine different varieties: Bavarian white sausage, Bavarian meatloaf in thin and thick slices, Lyon sausage, Lyon sausage with paprika pieces, “bierschinken” ham sausages, a “Gourmet Trio” package of three different cold sausages, wienerwurst, and boiled bratwurst.
Not only do the sausage varieties contain particularly high amounts of DHA and EPA, their overall fat content is well below that of comparable conventional products.
“We use specially processed fish oil that contains by itself over 90 percent of valuable fatty acids,” said Eisner. “For comparison: the original product contains only 30 percent. Because we optimized the fat balance in general, EDEKA was able to reduce the total amount of fat. And despite the added value in terms of health benefits, the sausages are just as tasty as their “regular” counterparts.”
