SelSaf is an organic source of selenium produced by yeast. Selenium is a chemical element with the symbol Se. Selenium is an essential nutrient for animals, however, in large doses it can be toxic. In the animal selenium protects against oxidative damage and infection. It is furthermore a constituent of several selenoproteins that play critical roles in reproduction, thyroid hormone metabolism and DNA synthesis.  

The product is authorised for use in the EU for all species

Main claim
Better utilization of selenium compared with inorganic sources. 

Technical specifications for SelSaf

EU category Nutritional additive
Functional group of additives Compound of trace element
Composition Contains a minimum of 2000 mg Se / kg product ranging from 2000 to 2400 mg / kg product. Selenomethionine is the dominant source of Se comprising >62% of the total content of Se.
Active substance  Selenized enriched yeast produced by Saccharomyces cerevisiae CNCM I-3399
EU code 3b8.12
EU approval All species.  The maximum total content of selenium must not exceed 0.50 mg/kg of complete feed
End of period of EU authorisation 19 October 2019*
*: An application according to Article 7 has been submitted.
Safety and handling It is recommended to wear breathing protection, safety glasses and gloves in order to minimize contact with skin and exposure to inhalation
Specific conditions for use Shall be incorporated into the final feed in the form of a premix
Shelf-life After 12 months of storage at either 25°C and 60 % relative humidity or 40°C and 75 % relative humidity the rates of recovery of total Se were 96.1% and 94.9 %, respectively. When incorporated into a premixture or complete feed the recovery of selenium was stable for at least six or four months, respectively, when stored at a temperature 25°C and 60 % humidity
Heat stability Pelleting did not affect the content of selenonmethionine, however no data for pelleting temperature was provided
Characterisation of product Tan to light brown  powder with a characteristic odour of baker´s yeast. The dusting potential is low. The proportion particle < 100 μm was 62! and 6.7 % were < 10 μm
Producer LeSaffre


List of references

EFSA (2009). Safety and efficacy of SELSAF (Selenium enriched yeast from Saccharomyces cerevisiae CNCM I-3399) as feed additive for all species. Scientific opinion of the panel on additives and products or substances used in animal feed. The EFSA Journal (2009) 992, 1-24 

EU (2009). Commission Regulation (EC) No 900/2009 of 25 September 2009 concerning the authorisation of selenomethionine produced by Saccharomyces cerevisiae CNCM I-3399 as a feed additive. Official Journal of the European Union. L256/12-13