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Dear Colleagues,

Natural products are gaining even more importance regarding their replacement of drugs in human and veterinary clinical practice. Many in vitro and in vivo studies have demonstrated the ability of natural products to also act as nutraceuticals, i.e., to “feed” and “heal” simultaneously. Besides these features, natural products meet consumers’ demands for safe, healthy, and sustainable foods for pets and livestock animals, and they are able to reduce bacterial contamination and spread.

On the other hand, natural products require the quantity to be administered to be fine-tuned to reduce their potential adverse effects and prevent the possible onset of resistance phenomena. The aim of this Special Issue is to amalgamate recent evidence about new potential applications of natural products in animal practice, insights into their unexplored adverse/toxic effects, and first resistance phenomena. Reviews will be considered as long as they mainly focus on the aforementioned aspects.

Dr. Alessandro Di Cerbo
Dr. Shakira Ghazanfar
Guest Editors

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Keywords

natural products
functional foods
pets
livestock
antimicrobial resistance

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Review

13 pages, 757 KiB

Open AccessReview

The Efficacy of Yeast Supplementation on Monogastric Animal Performance—A Short Review

Vetriselvi Sampath

Shanmugam Sureshkumar

and

In Ho Kim

Life 2023, 13(10), 2037; https://doi.org/10.3390/life13102037 - 11 Oct 2023

Viewed by 715

Abstract

Due to a continual growth in the world’s population and the prohibition of antibiotics in animal production, the livestock industry faces significant challenges in the global demand for meat, eggs, and dairy products. The growing demand for organic products and the prohibition on antibiotic growth promoters (AGPs) have compelled animal nutrition experts to search for natural substitutes that include medical plants and beneficial microorganisms. Natural feed additives like probiotics are found to be more effective than AGPs in reducing the load of harmful intestinal pathogens. One of the probiotics that has generated considerable interest since ancient times is yeast. Yeast is used as a supplement in animal feeds due to its relatively high protein, amino acid, energy, and micronutrient content. Yeast byproducts such as yeast cells and cell walls contain nutraceutical compounds (i.e., β-glucans, mannooligosaccharides, and nucleotides) and have been shown to improve animal growth performance and health. Though the application of yeast supplements has been reviewed to date, only a scarce amount of information exists on the yeast-derived products in non-ruminant nutrition. Additionally, it is difficult for nutritionists to differentiate the characteristics, composition, and optimal feeding among the diverse number of yeast-containing products. Due to the increasing popularity of using yeast-based products in animal feeds, the development of analytical approaches to estimate yeast and its components in these products is greatly needed. Thus, in this review, we intend to provide current knowledge of different categories of commercially available yeast and yeast-derived additives, along with their role in improving animal growth performance and health, their proposed mechanisms of action, and the challenges of quantifying yeast content and biologically active components. Full article

(This article belongs to the Special Issue Effects of Natural Products as Adjuvants on Animals)

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