The product Yea-Sacc® contains a strain of yeast Saccharomyces cerevisiae. The additive is currently authorised for use in the EU in various ruminant species as well as in horses. 

Yea-Sacc is available in two different forms; powder and prills

Manufacturer´s main claims
Improves fibre digestion
Stabilizes cecal/colon pH (in horses)

Increases phosphorus availability (in horses)
Improves animal performance

Technical specifications of Yea-Sacc® (powder) and Yea-Sacc® TS (prills)

EU category
Zootechnical additive
Functional group of additives Horses: Digestibility enhancer
Ruminants: Gut flora stabilisers
Active substance Saccharomyces cerevisiae CBS 493.94 or NCYC 1026
Activity in the product 1 x 109 CFU/g in both powder and granulated products
EU approval, minimum content No maximum content indicated for any of the species below
Dairy cows and minor ruminant species: 1 x 107 CFU/kg feed
Cattle for fattening and minor ruminant species for fattening: 1 x 108 CFU/kg feed
Horses: 1.6 x 109 CFU/kg feed
End of period of authorisation Dairy cows and minor ruminant species: 10 November 2024
Cattle for fattening and minor ruminant species for fattening: 10 November 2024
Horses: 26 October 2030
EU code 4a1704
Recommended dosage Horses: 4.7 x 109 CFU/kg complete feedingstuff
Product storage stability When stored at 20°C or 30°C in commercial unsealed bags data supports a shelf life of at least 12 months.  
Storage stability in feed and premix Product stability when added to premixtures was confirmed after a storage time of four months. When added to commercial bovine feed a loss of 0.5 log counts was observed after three months of storage at ambient temperatures (18 - 24°C)
Heat stability Pelleting temperatures at 60°C and 70°C did not decrease viability, however, at 80°C a loss of one log value was seen.
Carrier Yeast
Handling It is recommended to use respiratory protection during handling
Producer Alltech

List of references

EFSA (2014). Scientific Opinion on the safety and efficacy of Yea-Sacc® (Saccharomyces cerevisiae) as a feed additive for cattle for fattening, goats for fattening, dairy cows, dairy sheep and buffaloes. EFSA Journal 2014;12(5):3666

EU (2013). Commission Implementing Regulation (EU) No 1109/2014 of 20 October 2014 concerning the authorisation of the preparation of Saccharomyces cerevisiae CBS 493.94 as a feed additive for cattle for fattening, minor ruminants species for fattening, dairy cows and minor dairy ruminant species and amending Regulation (EC) No 1288/2004 and (EC) No 1811/2005 (holder of authorisation Alltech France). Official Journal of the European Union. L 301/19-21

EU (2020). Commission Implementing Regulation (EU) 2020/1398 of 5 October 2020 concerning the renewal of the authorisation of Saccharomyces cerevisiae CBS 493.94 as a feed additive for horses and repealing Regulation (EC) No 886/2009 (holder of authorisation All-Technology Ireland Ltd). Official Journal of the European Union. L324/26-28