The need to guarantee ruminant absorption of a correct amount of nutrients in the intestine cannot disregard the degradation by the rumen microflora. For over 30 years our scientific research has set the goal to improve the rumen bypass so that a lower concentration of active ingredients in the diet leads to maximizing performance.


Relys® contains 33% of rumen-protected microencapsulated L-Lysine.


Relys® if used alone or in combination with Timet® allows to obtain amino acids balanced ration so to maximize milk and milk solids output.
Lysine in Relys® is microencapsulated in a lipid matrix in order to by-pass the rumen and be highly available at the intestinal level. Different studies demonstrated that it increased plasma lysine concentrations.
It optimizes nitrogen metabolism of the dairy cow, improves milk protein yield and is a cost-effective option for delivering available lysine to support milk production.


Nutritional evaluation of Relys® is available for nutritional software based on the dynamic models (CNCPS and CPM).
The degree of rumen by-pass of Relys® has been certified by independent research institutes applying the in-vivo nylon bags technique and availability in plasma.

Latest articles from the Press Room

  • Ruminants

    Methionine is considered the most limiting essential amino acid for ruminants (Schwab & Broderick, 2017). This element has a pivotal role in their productive performance and nitrogen efficiency.

  • Ruminants

    Our findings in Holstein calves are early evidence that dietary microencapsulated OA/PB feeding is a means to partially restore feed intake and average daily gain post-weaning when challenged by heat exposure.

  • Ruminants

    Heat stress develops with methyl donor deficiency in parallel with an impaired N metabolism. The supplementation of OA/PB improves the remethylation capacity in the liver. On-going transcriptomic analyses will provide a better understanding of the hepatic metabolism of dairy cows exposed to heat stress.