Selenium-enriched yeast is an organic selenium source from nature. There are more and more options on the market now, so it can be tricky to choose a good selenium-enriched yeast.
A different source of selenium-enriched yeast may differ in terms of the production process, visual aspect, purity, quality; As a result, they come out different levels of bioavailability of Se or its assimilation by the animals.
In this article, we summarize 5 tips on how to choose a good selenium-enriched yeast:
Light beige color is a better choice
When it comes to the selenized yeast product, different colors are presented in the feed market: from light to darker brown.
Insufficient washing can lead to residues of sugar coming from molasses in the Se-enriched yeast cream, it comes out a darker brown color, and it will be less digestible by animals.
During drying, the sugar residues and proteins will cause a Maillard reaction, which changes the protein profile and results in a decrease in protein digestibility. Since most organic selenium is stored in the yeast protein fraction, selenium release and assimilation might be impaired.
The lighter color results from constant control throughout the production process and reflects the high quality of the product. In contrast, a darker brown color may be a sign of indigestible selenized yeast.
Certificate of analysis is a must
Ensure that you get a Certificate of Analysis for each production batch. This is proof of good control of the manufacturing process to ensure batch-to-batch consistency and assurance of product composition. Analyzing the total selenium and selenomethionine (SeMet) content of each production batch is essential to assure users of a high-quality product.
A combination of several organic Se forms
According to EU regulations, selenium-enriched yeast should contain more than 98% organic selenium.
The bioavailability of selenium-rich yeast is even more important when it incorporates multiple forms of selenium, such as selenomethionine (SeMet) and selenocysteine (SeCys).
Selenium metabolism in animals involves different forms of selenium.
High SeMet level is a sign of high-quality
Although it is not the only organic selenium compound in selenized yeast, SeMet levels are a good quality tracker of the fermentation process and selenium uptake by yeast. For example, to be sold as a nutritional feed additive in the EU, SeMet levels should be > 63% of total selenium.
Reliable bioavailability studies means a lot
It is important to ensure that selenium in the animal’s diet is well absorbed. Bioavailability studies should consider the concentration in the animal’s blood, milk, eggs, or muscle, but it’s not enough; We should consider another factor, the Se transfer rate, which is the most reliable parameter to assess Se assimilation.
A premium source of bioavailable selenium: Hiyeast© Selenium Yeast
Hiyeast© Selenium Yeast is inactivated yeast enriched with selenium (Se) from Saccharomyces cerevisiae. It absorbs inorganic selenium and converts it into organic selenium, mainly selenomethionine and selenocysteine.
Hiyeast© Selenium Yeast offers guaranteed and proven quality and can be used in all animal species. It can be mixed into premixtures and compound feeds and is compatible with most ingredients and additives used in the manufacture of feeds.
For more information about the Selenium Yeast, please visit our website or contact our teams!