ArticleAnimal bioscience2021
Essential oils as growth-promoting additives on performance, nutrient digestibility, cecal microbes, and serum metabolites of broiler chickens: a meta-analysis.
Article in Animal bioscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
26 citing papers in PubMed, 1 synthesis or guideline pooled it, 75 citations in OpenAlex.
- Protective effects of feed additives on broiler chickens exposed to aflatoxins-contaminated feed: a systematic review and meta-analysis.Veterinary research communications · 2024Pooled it
- Encapsulation of essential oils from tropical plants as a strategy to mitigate methane emissions and improve nutritional status of ruminants: A review.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2026Review
- Broiler Responses to a Phytogenic Nutritional Additive Under Different Dietary Nutrient Matrix Credit Strategies.Animals : an open access journal from MDPI · 2026Article
- Evaluation of Oral Supplementation of Black Cumin (Nigella sativa) on Growth Performance, Immune Response, Disease Incidence and Mortality Rate of Suckling Zaraibi Goat Kids.Veterinary medicine and science · 2026Article
- Essential oils alleviate coccidiosis impact in broiler chickens: a meta-analysis.Animal bioscience · 2025Article
- Eugenol accelerates intestinal stem cell regeneration to protect the intestinal barrier integrity through inhibiting JAK2/STAT3 signaling pathway in Salmonella enteritidis-challenged broiler chicks.Journal of animal science and biotechnology · 2025Article
- Dietary encapsulated essential oils improve growth performance and regulate stress-responsive genes in heat-stressed broilers.Journal of animal science · 2025Article
- Effects of microencapsulated essential oils and seaweed meal on growth performance, digestive enzymes, intestinal morphology, liver functions, and plasma biomarkers in broiler chickens.Journal of animal science · 2025Article
- Article
- Effects of dietary supplementation with a thymol-carvacrol blend on growth performance and intestinal health of poultry.Frontiers in veterinary science · 2025Article
- Leptin, adiponectin, biochemicals, metabolic hormones and performance characteristics of broiler administered with spices essential oil.Tropical animal health and production · 2024Article
- Oregano essential oil and Bacillus subtilis role in enhancing broiler's growth, stress indicators, intestinal integrity, and gene expression under high stocking density.Scientific reports · 2024Article
- Impact of Nanoencapsulated Rosemary Essential Oil as a Novel Feed Additive on Growth Performance, Nutrient Utilization, Carcass Traits, Meat Quality and Gene Expression of Broiler Chicken.Foods (Basel, Switzerland) · 2024Article
- Effects of essential oils on egg production and feed efficiency as influenced by laying hen breed: A meta-analysis.Veterinary world · 2024Article
- Effect of a microencapsulated phyto/phycogenic blend supplementation on growth performance, processing parameters, meat quality, and sensory profile in male broilers.Frontiers in veterinary science · 2024Article
- The relationship between G1 (c.260 G>A) and G4 (c.721 G>A) polymorphisms in the GDF9 gene and the litter size of sheep: A meta-analysis study.Journal of advanced veterinary and animal research · 2023Article
- Relationships between dietary rumen-protected lysine and methionine with the lactational performance of dairy cows - A meta-analysis.Animal bioscience · 2023Article
- Comparative effects of medium-chain fatty acids or phytobiotics-based feed additives on performance, caecum microbiota, volatile fatty acid production and intestinal morphology of broilers.Veterinary medicine and science · 2023Article
- Effect of Chitosan on Ruminal Fermentation and Microbial Communities, Methane Emissions, and Productive Performance of Dairy Cattle.Animals : an open access journal from MDPI · 2023Article
- Dietary oregano aqueous extract improves growth performance and intestinal health of broilers through modulating gut microbial compositions.Journal of animal science and biotechnology · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
objectiveThe purpose of this meta-analysis was to evaluate the effect of dietary essential oils (EOs) on productive performance, nutrient digestibility, and serum metabolite profiles of broiler chickens and to compare their effectiveness as growth-promoting additives against antibiotics.
methodsPeer-reviewed articles were retrieved from Web of Science, Science Direct, PubMed, and Google scholar and selected based on pre-determined criteria. A total of 41 articles containing 55 experiments with 163 treatment units were eligible for analyses. Data were subjected to a meta-analysis based on mixed model methodology considering the doses of EOs as fixed effects and the different studies as random effects.
resultsResults showed a linear increase (p<0.001) on body weight gain (BWG) where Antibiotics (FCR) and average daily feed intake decreased (p<0.001) linearly with an increasing dose of EOs. Positive effects were observed on the increased (p<0.01) digestibility of dry matter, crude protein, ether extract, and cecal Lactobacillus while Escherichia coli (E. coli) population in the cecum decreased (p<0.001) linearly. There was a quadratic effect on the weight of gizzard (p<0.01), spleen (p<0.05), bursa of fabricius (p<0.001), and liver (p< 0.10) while carcass, abdominal fat, and pancreas increased (p<0.01) linearly. The dose of EOs linearly increased high density lipoprotein, glucose, protein, and globulin concentrations (p<0.01). In comparison to control and antibiotics, all type of EOs significantly reduced (p<0.001) FCR and tended to increase (p<0.1) BWG and final body weight. Cinnamaldehyde-compound was the only EOs type showing a tendency to increase (p<0.1) carcass weight, albumin, and protein of serum metabolites while this EOs together with EOs-Blend 1 decreased (p<0.01) E. coli population. Low density lipoprotein concentration decreased (p<0.05) with antibiotics and carvacrol-based compound when compared to the control group.
conclusionThis evidence confirms that EOs are suitable to be used as growth promoters and their economical benefit appears to be promising.
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