Make Nutrition Easy with Trace Elements Plus Rumensin™

June 13, 2022

Make Nutrition Easy with Trace Elements Plus Rumensin™

Nutritech is the exclusive distributor for Rumensin™ in New Zealand, with the well- known Rumensin™ Trough Treatment, Millmix™, Technical widely available through all reputable resellers.

Rumensin™ (monensin sodium) is one of the most researched feed additives in the market – it has over 100 peer-reviewed scientific publications, as well as studies from Massey University (NZ) and Ellinbank Research Institute (Australia). The effectiveness of Rumensin™ is well proven in both grazing and intensive concentrate feeding systems.

Nutritech makes animal nutrition easy with its ability to add Rumensin™ to a farm’s trace element programme, meaning one less job and greater accuracy of dosing. Rumensin™ is available via custom formulations or by selecting the Rumensin™ option with well-known brands such as HiTrace®5, AquaTrace®5 and NutriPlex®5. For the most significant impact on reducing ketosis, it is best to start Rumensin™ in the springer transition diet. Choosing NutriMin® Springer Cow Balancer plus Rumensin™ makes this process easy and can be followed with your choice of Nutritech lactation mineral supplement plus Rumensin™.

Economic benefits

At a $9.00 midpoint forecast payout the return on investment on Rumensin™ has never been better at 6:1 for Rumensin™ Trough Treatment and over 17:1 for Rumensin™ 20% Mill Mix

These return on investments take into account the wide spectrum of benefits that come from using Rumensin™ , including the milk production increase (+2%)¹ , decrease in sub-clinical ketosis (18-25%reduction)² , liveweight gain increase (+0.06kg LWG / day)³ , mastitis and lameness reduction (both a 0.91 relative risk ratio)⁴

Environmental benefits

Ionophores such as Rumensin™ reduce methane production by lowering the availability of hydrogen and formate, the primary substrates for methanogens. This means more digestible energy can be captured from feed, resulting in more efficient use of feed energy. It also lessens the contribution of cattle to atmospheric methane accumulation, with a meta-analysis by Appuhamy et al., (2013) concluding the percentage of gross dietary energy lost as methane reduced by 0.23% in dairy cows when are fed monensin.

How does Rumensin™ work?

Rumensin™ (monensin sodium) is an ‘ionophore’ naturally produced by a specific bacterial strain, Streptomyces cinnamonensis. An ionophore is a substance that can transport particular ions across the fat membrane in a cell. When fed to ruminants, the Rumensin™ ionophore affects the function of specific rumen bacteria, which changes the dynamics in the rumen.

The selectivity of monensin causes a shift in rumen bacterial populations, which has several impacts on ruminant metabolism. These include:

  • Change in VFA production (more glucose for the cow, meaning reduced ketosis risk and increased milk production)
  • Change in the site of starch digestion (more post-ruminally, increasing glucose supply for the cow)
  • Reduction in lactic acid production (reducing the risk of rumen acidosis and SARA)
  • Altered nitrogen metabolism (increasing nitrogen digestibility)
  • Change in the viscosity of rumen fluid (reducing bloat risk)

For more information on adding Rumensin™ to improve the health and performance of dairy cows, get in touch with your local Nutritech Area Manager.


  1. Duffeild (2008b). A Meta-Analysis of the Impact of Monensin in Lactating Dairy Cattle. Part 2. Production Effects. Journal of Dairy Science 91 1347–1360
  2. Compton et al., (2015). Efficacy of controlled-release capsules containing monensin for the prevention of subclinical ketosis in pasture-fed dairy cows. New Zealand Veterinary Journal 63:5 249-253 and Duffeild et al., (2008c). A Meta- Analysis of the Impact of Monensin in Lactating Dairy Cattle Part 3. Health and Reproduction. Journal of Dairy Science 91 2328–2341.
  3. Duffeild (2008b). A Meta-Analysis of the Impact of Monensin in Lactating Dairy Cattle. Part 2. Production Effects. Journal of Dairy Science 91 1347–1360
  4. Westwood, CT., Bramley, E., & Lean, I.J., (2003). Review of the relationship between nutrition and lameness in pasture-fed dairy cattle, New Zealand Veterinary Journal , 51:5, 208-218

Sign up for a FREE

on-farm consultation