August 12, 2010

UK SCA Nutec to introduce new antioxidant feed additive

Specialist animal nutrition company, SCA NuTec is launching its new antioxidant feed additive, NuShield at this year's Dairy Event, NEC, September 7 and 8.

NuShield, has been developed through parent company Provimi's research and development programme. It contains flavenoids that are present in plants, but are particularly high in grapeseed. Due to the levels of flavenoids and the unique extraction process, NuShield offers much higher bio-availability of antioxidants to the animal than vitamin E or vitamin C.

"Our trial results have shown that the antioxidant status of cows fed on diets including NuShield compare favourably with cows fed diets that include the more traditional antioxidants such as vitamin E," said SCA NuTec technical ruminant manager Norman Downey. "But taking this a stage further, our research programme has proved that a combination of antioxidants, including NuShield and vitamin E, is much more effective than a single antioxidant at higher levels.

"In practice, this means that with the correct combination of these two antioxidants, we can provide better defence against free radicals and therefore improved immunity than the traditional approach of simply increasing vitamin E," he said.

Animals are under oxidative stress when there are excess free radicals in the body. These free radicals are formed from metabolic processes and an excess can occur at any time but for cows this is particularly common around calving and during early lactation. As a result, the cow's immunity status will fall, leaving her more prone to disease and infection.

"To overcome this, we need to improve the antioxidative status of the cow and we have typically achieved this by including vitamin E in the diet," said Downey. "There has been a temptation to increase levels of vitamin E where there has been a problem with disease breakdown, such as mastitis. Trial work has shown us that we need to update our thinking here as including vitamin E at higher levels can actually depress immunity. But a combination of antioxidants, such as vitamin E and NuShield, can complement each other and improve immunity cost effectively."

As well as providing antioxidant benefits, NuShield has been shown to stabilise vitamin E to increase its effectiveness. Up to 50% of Vitamin E can be replaced in the diet where NuShield is used and based on current prices this is cost effective.