Dietary supplementation of essential oils in dairy cows: evidence for stimulatory effects on nutrient absorption
Open accessAbstract
Results of recent in vitro experiments suggest that essential oils (EO) may not only influence ruminal fermentation but also modulate the absorption of cations like Na+, Ca2+ and NH4 + across ruminal epithelia of cattle and sheep through direct interaction with epithelial transport proteins, such as those of the transient receptor potential family. The aim of the current study was to examine this hypothesis by testing the effect of a blend of essential oils (BEO) on cation status and feed efficiency in lactating dairy cows. In the experiment, 72 dairy cows in mid-to-end lactation were divided into two groups of 36 animals each and fed the same mixed ration with or without addition of BEO in a 2×2 cross-over design. Feed intake, milk yield and composition, plasma and urine samples were monitored. Feeding BEO elevated milk yield, milk fat and protein yield as well as feed efficiency, whereas urea levels in plasma and milk decreased. In addition, plasma calcium levels increased significantly upon BEO supplementation, supporting the hypothesis that enhanced cation absorption might contribute to the beneficial effects of these EO.
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Increased feed efficiency and calcium homeostasis have been observed with supplementation of a plant bioactive essential oil blend (>80% menthol, eugenol, and anethol).
“Increased feed efficiency and calcium homeostasis have been observed with supplementation of a plant bioactive EO blend (>80% menthol, eugenol, and anethol).”
From Phytogenic Additives Can Modulate Rumen Microbiome to Mediate Fermentation Kinetics and Methanogenesis Through Exploiting Diet–Microbe Interaction (2020) · cites this paper as [259]
The Discussion reports significantly elevated feed efficiency and plasma calcium after supplementation with a blend containing more than 80% menthol plus smaller amounts of eugenol and anethol. The Conclusion says these effects *suggest* improved calcium homeostasis; it does not report calcium homeostasis itself as an observed outcome. (LLM, conf=0.85)
Experimental — accuracy not yet measuredIncreased uptake of calcium and ammonium was observed as a result of specific cation-transporting proteins expressed by the rumen.
“Increased uptake of calcium and ammonium was also observed as a result of specific cation-transporting proteins expressed by the rumen.”
From Phytogenic Additives Can Modulate Rumen Microbiome to Mediate Fermentation Kinetics and Methanogenesis Through Exploiting Diet–Microbe Interaction (2020) · cites this paper as [259]
The Conclusion proposes that essential oils activate ruminal cation-transporting proteins, increasing calcium and ammonium uptake; it does not report that mechanism as an observed result. The Discussion reports stimulated transport across isolated ruminal tissue, but treats the mechanism and its relevance to the cows in this study cautiously. The supplied passages have section labels but no page numbers. (LLM, conf=0.88)
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- Authors
- Braun, H.-S., Schrapers, K. T., Mahlkow-Nerge, K., Stumpff, F., & Rosendahl, J.
- Affiliations
- Freie Universität Berlin (DE)
- Hochschule für Angewandte Wissenschaften Kiel (DE)
- Corresponding author
- Braun, H.-S.
- Schrapers, K.T.
- Rosendahl, J.
- Venue
- animal
- Publisher
- Elsevier BV
- Published
- 2019
- Volume
- 13
- Issue
- 3
- Pages
- 518-523
- ISSN
- 1751-7311 (ISSN-L)
- PMC
- PMC6378544
- OpenAlex
- W2884811716
- Cited by
- 64
- References
- 28
- Citations by year
- 2026: 10 · 2025: 7 · 2024: 10 · 2023: 11 · 2022: 5 · 2021: 2 · 2020: 13 · 2019: 4 · 2018: 1
- FWCI
- 8.44
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- animal (publishedVersion, cc-by-nc-nd)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Refubium (Universitätsbibliothek der Freien Universität Berlin) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Universitätsbibliothek der FU Berlin Hochschulschriftenstelle u. Dokumentenserver (cc-by)
- Funders
- European Social Fund
- Freie Universität Berlin
- Bundesministerium für Wirtschaft und Technologie (03EUABE057)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
- Keywords
- essential oils, dietary supplementation, dairy cattle, lactation, cation absorption, rumen epithelium, TRP channels, feed efficiency, milk yield, milk composition, plasma calcium, serum urea, rumen fermentation
- MeSH terms
- Nutrients, Animals, Cattle, Diet, Digestion, Female, Milk, Oils, Volatile, Rumen, Cross-Over Studies, Dietary Supplements
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