# Safety of a feed additive consisting of Sepiolitic clay for all animal species (MYTA S.A.)

**Authors:** Roberto Edoardo Villa, Giovanna Azimonti, Eleftherios Bonos, Henrik Christensen, Mojca Durjava, Birgit Dusemund, Ronette Gehring, Boet Glandorf, Maryline Kouba, Marta López‐Alonso, Francesca Marcon, Carlo Nebbia, Alena Pechová, Miguel Prieto‐Maradona, Ilen Röhe, Katerina Theodoridou, Vasileios Bampidis, Montserrat Anguita, Orsolya Holczknecht, Matteo L. Innocenti, Jordi Ortuño

PMC · DOI: 10.2903/j.efsa.2025.9365 · EFSA Journal · 2025-04-10

## TL;DR

The paper concludes that sepiolitic clay is safe as a feed additive for all animal species at the recommended levels, though it poses some inhalation risks.

## Contribution

The study confirms the safety of sepiolitic clay for all animal species at the maximum recommended level of 20,000 mg/kg feed.

## Key findings

- Sepiolitic clay is safe for all animal species at 20,000 mg/kg feed.
- It is a respiratory and dermal sensitiser and poses inhalation risks due to dusting and silica content.
- No safety concerns for consumers or the environment were identified.

## Abstract

Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety of Sepiolitic clay as a technological feed additive for all animal species. In 2022, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) delivered an opinion on the safety and efficacy of the same additive. The Panel concluded that Sepiolitic clay used as a feed additive is safe for the consumers and the environment, and efficacious as a binder and anticaking agent in feed for all animal species under the proposed conditions of use. The additive was not considered an eye or skin irritant. However, it was considered a respiratory and dermal sensitiser. Due to the dusting potential and its silica content, the additive was considered a risk by inhalation. Regarding the target species, in the previous Opinion, the Panel concluded that the additive was safe for dairy ruminants and growing Suidae at the recommended use level (20,000 mg/kg feed), for chickens for fattening at 10,000 mg/kg feed and for salmonids at 17,600 mg/kg feed. No conclusion could be drawn for all other species/categories. Based on the tolerance studies in chickens for fattening and trout evaluated in the current assessment, and the ones in weaned piglets and dairy cows previously assessed, the Panel concluded that the inclusion of Sepiolitic clay at the maximum recommended level of 20,000 mg/kg complete feed is safe for all animal species.

## Linked entities

- **Species:** Suidae (taxon 9821)

## Full-text entities

- **Chemicals:** silica (MESH:D012822), Sepiolitic clay (-)
- **Species:** Salmonidae (salmonids, family) [taxon 8015], Gallus gallus (bantam, species) [taxon 9031], Bos taurus (bovine, species) [taxon 9913], Suidae (boars, family) [taxon 9821], Salmo trutta (river trout, species) [taxon 8032]

## Full text

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## References

4 references — full list in the complete paper: https://tomesphere.com/paper/PMC11982922/full.md

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Source: https://tomesphere.com/paper/PMC11982922