Our recent research on resin acids presented at ESPN

Juhani Vuorenmaa, R & D Director

Hankkija’s resin acid research was presented by two posters at European Symposium on Poultry Nutrition in Gdansk Poland last week.

In the “Beneficial performance effect of tall oil fatty acids is likely based on the effects of resin acids” study, we investigated the performance effects of the potential bioactive compounds of our tall oil fatty acid product Progres® in broilers.

In the 35-day performance trial with 540 male Ross 308 broilers (15x12 birds per treatment) at Alimetrics Research Farm a natural resin acid composition RAC/Progres® (90% fatty acids and 9% resin acids) and a purified concentrated resin acids CRA were tested at the same resin acids concentration in the diets. A non-supplemented diet served as a control treatment (CTR). Both experimental resin acid treatments significantly outperformed the control treatment in body weight gain 0-35 days (CTR: 2467 g, RAC: 2610 g, CRA: 2601 g; P<0.05) and the mortality-corrected feed conversion ratio until 21 days of age (CTR: 1.42, RAC: 1.37, CRA: 1.39; P<0.05).

The trial showed resin acids as the main active compounds of Progres®.

In the “In-feed resin acids do not accumulate in broiler breast muscle or adipose tissue” study we investigated the resin acids distribution in the gastrointestinal tract and tissues of RAC/Progres® fed broilers using titanium dioxide as a digestibility marker. The trial was done to investigate how much resin acids are absorbed and retained in the tissues.

The study showed that about 60 to 70% of the resin acids added into the diets was found in intestinal contents and faeces. Small amounts of resin acids were found in blood, jejunal tissue and bile. It was concluded that some of the diet-derived resin acids were absorbed in the small intestine and re-introduced into the gut via bile.

From the consumer safety perspective, it is notable that even a 4-fold overdose of RAC resulted in negligible resin acid levels in muscle and adipose tissues.

We enjoyed discussing our recent research findings and would like to thank all those who met us at ESPN!