Naturally Supporting Piglet Performance.

Orego-Stim, a consistent high quality source of 100% natural Oregano Essential Oil developed to support optimum gut integrity and performance.

Developed to manage intestinal health, support optimum gut integrity and performance, Orego-Stim is a 100% natural oregano essential oil feed additive available in both powder and liquid formulations as well as a formulation for top dress to the daily sow ration.

Orego-Stim has been shown to have anti-inflammatory, anti-microbial, anti-oxidant and immunomodulatory effects and is suitable for use in organic production. Packaged in unique foil packaging to ensure long shelf-life, Orego-Stim’s quality and consistency are guaranteed.

In trials Orego-Stim has been shown to:

Orego-Stim Supports Progeny Growth Performance and Health in the Absence of Zinc Oxide

  • This trial showed that Orego-Stim® is able to support sow lactation performance and piglet weaning weights on a commercial farm in the absence of zinc oxide.
  • No impact of removing therapeutic zinc levels from piglet diets was seen in growth, medication use or mortality.
  • The suckling period is a critical time in the piglet’s life for the acquisition of a healthy gut microbiota, necessary for the development of digestive function, gut barrier protection and immune development.
  • This work is part of the Anpario’s 4R’s approach (Review, Reduce and Replace antimicrobials Responsibly


  • Orego-Stim is a high quality, eubiotic containing 100% natural oregano oil.
  • Zinc is routinely used at high levels to control post-weaning scours but has been linked to environmental pollution and antibiotic resistance in some bacteria, such as MRSA. (Yazdankhah et al., 2014).
  • The European commission has banned the use of pharmacological levels of zinc (>150ppm) in piglet diets from June 2022.

Trial Design

Anpario conducted a randomised blinded trial managed by a feed integrator on an Irish commercial herd. Eighty multiparous sows across two batches were randomly allocated to either the control group or Orego-Stim (OS) supplemented group, with OS top dressed to diets daily at an equivalent rate of 1kg/t, from 3 days prior to farrowing until weaning. All piglets were weighed at birth and any cross-fostering was carried out within treatment groups to fill to teat number within 48 hrs. Piglets were provided creep feed from day 10 and weaned ~27 days, diets either included zinc oxide (Control) at 3.1 kg/t, or OS at 1 kg/t. See Annex 1 for trial design.


Figure 1. Piglet average weaning weight and weight at the end of the nursery period (kg).Figure 2. Piglet pre-weaning mortalities for starvation and scour (% of total mortalities per group).
  • Piglets from the OS group performed similarly to those from the control group with average piglet weaning weights of ~7kg per piglet (Fig. 1), the numerical benefit seen with OS remained at the end of the nursery period with OS fed piglets being numerically heavier (~0.5kg) than the control group.
  • Pre-weaning mortality was the same for both groups (9%) but interestingly piglets from OS litters had a reduced incidence of starvation or scour (Fig. 2).
  • Sows receiving OS maintained a similar body condition score (BCS) to the control sows but lost ~10kg less body weight over the lactation period.
  • Medication use was not significantly affected by the removal of therapeutic zinc in piglets and post weaning mortality was also consistent between groups.
  • Orego-Stim has been shown to support sow and piglet performance in the absence of zinc oxide.

Annex 1 – Trial Design

Quality Guaranteed

From Process to Product

The natural Oregano Essential Oil (OEO) in Orego-Stim is extracted from Anpario’s exclusive oregano strain, cultivated organically in central Europe. From point of harvest through the unique extraction method and onward production processes, we protect the active properties in the natural oil to ensure a high-quality product every time.

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Orego-Stim High Quality from Process to Product

Orego-Stim is unique as only the natural whole oil is used.

Orego-stim contains naturally occurring compounds which work in synergy to offer several well-documented properties and functions of OEO.

Consistency in every batch

Oregano Essential Oil used to produce Orego-Stim consists of 100+ naturally occurring active compounds, frequent monitoring ensures consistent quality batch after batch, which is vital to ensure product performance.

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