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 40 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.


SmartSel® is a rumen by-pass source of sodium selenite and represents a “smart” alternative to organic selenium and free sodium selenite. Selenium promotes the response of animals to oxidative stress and the function of their immune system.


SmartSel® is a microencapsulated source of sodium selenite.
Selenium is an essential nutrient with a major role in preventing oxidative stress.
Sodium selenite is exposed to chemical reduction and subsequent insolubilization in the rumen by the microflora causing a reduction of selenium bioavailability.

Microencapsulation can prevent the selenium precipitation in the rumen resulting in higher levels of selenium absorbable in the small intestine with higher levels in plasma and milk, as shown in the scientific literature (Grilli et al., 2013, 7: 1944 – 1949).

Latest articles from the Press Room

  • Ruminants

    Rumen-protected methionine: a boost for primiparous dairy cows performance

    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

    Organic acid and plant botanical supplementation in heat-stressed Holstein calves

    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

    Effects of heat stress and dietary organic acids and botanicals on hepatic one-carbon metabolism

    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.