Journal article

Authors list: Ringseis, Robert; Keller, Janine; Eder, Klaus

Publication year: 2018

Pages: 1-30

Journal: Archives of Animal Nutrition

Volume number: 72

Issue number: 1

ISSN: 1745-039X

eISSN: 1477-2817

DOI Link: https://doi.org/10.1080/1745039X.2017.1421340

Publisher: Taylor and Francis Group

Abstract: 
Carnitine has long been known to play a critical role for energy metabolism. Due to this, a large number of studies have been carried out to investigate the potential of supplemental carnitine in improving performance of livestock animals including ruminants, with however largely inconsistent results. An important issue that has to be considered when using carnitine as a feed additive is that the efficacy of supplemental carnitine is probably dependent on the animal's carnitine status, which is affected by endogenous carnitine synthesis, carnitine uptake from the gastrointestinal tract and carnitine excretion. The present review aims to summarise the current knowledge of the regulation of carnitine status and carnitine homeostasis in ruminants, and comprehensively evaluate the efficacy of carnitine supplementation on performance and/or health in ruminant livestock by comparing the outcomes of studies with carnitine supplementation in dairy cattle, growing and finishing cattle and sheep. While most of the studies show that supplemental carnitine, even in ruminally unprotected form, is bioavailable in ruminants, its effect on either milk or growth performance is largely disappointing. However, supplemental carnitine appears to be a useful strategy to offer protection against ammonia toxicity caused by consumption of high levels of non-protein N or forages with high levels of soluble N both, in cattle and sheep.

Harvard Citation style: Ringseis, R., Keller, J. and Eder, K. (2018) Regulation of carnitine status in ruminants and efficacy of carnitine supplementation on performance and health aspects of ruminant livestock: a review, Archives of Animal Nutrition = Archiv für Tierernährung , 72(1), pp. 1-30. https://doi.org/10.1080/1745039X.2017.1421340

APA Citation style: Ringseis, R., Keller, J., & Eder, K. (2018). Regulation of carnitine status in ruminants and efficacy of carnitine supplementation on performance and health aspects of ruminant livestock: a review. Archives of Animal Nutrition = Archiv für Tierernährung . 72(1), 1-30. https://doi.org/10.1080/1745039X.2017.1421340