A new video from AB Vista reveals details about why complete phytate destruction in the digestive tract may lead to increased growth efficiency in swine and poultry.
The video – the second in the new 'Extraordinary Science Brought to Life' series – explains what happens when phytic acid (IP6) is completely broken down by phytase superdosing.
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“Complete IP6 breakdown leads to the production of inositol – a nutrient that seems to play a valuable role in improving growth and feed conversion,” says Dr Mike Bedford, Research Director at AB Vista. “And tests have shown that the higher the amount of phytase added, the higher the level of inositol that is generated.
“Poultry studies showed that when phytase is applied, there is a reduction in the levels of IP6 and its lower esters. As a result there are increased levels of inositol released in the gizzard, which is then absorbed and results in better body weight gain and improved feed conversion. We believe that inositol provision is probably responsible for approximately 30% of the total response seen from superdosing.”
These studies suggest inositol is an essential nutrient that is not supplied adequately in a typical diet, Dr Bedford says.
Highlighting the benefits of superdosing
This video analysis of the benefits of inositol production follows the first video in the series, which looked at the importance of breaking down not only IP6, but lower phytate esters IP5, IP4 and IP3, which can also have anti-nutritive effects.
“Together, the two videos highlight key research that helps to explain why applying higher levels of the right type of phytase can result in animal performance improvements.”
Dr Bedford adds that not all phytases are equally capable of doing this.
“Superdosing gets rid of the phytate ester and also provides a nutrient – inositol. In order to achieve this, the phytase has to survive high-temperature pelleting in feed production. It also has to survive the conditions of the stomach, which is where phytases work. Most importantly, however, the phytase has to be able to break down IP6, IP5, IP4, IP3, and IP2 all the way down to IP1 very rapidly indeed. And this has to be done in a quantitative manner; we have to get rid of most of the IP6, IP5, IP4 and IP3, since these are anti-nutrients. But we also have to provide as much IP1 as possible, so that the animal can break that down and produce inositol.”
Watch the summary video
Watch more videos in the Extraordinary Science Brought to Life series