| 1 | Postbiotic Culbac® (fermentation product produced by Lactobacillus acidophilus species)Starter diet: 1 kg/ton, grower and finisher diet: 0.5 kg/ton in dry form and in the aqueous form, 4 mL/L drinking water | Broiler chicks5 wk | - Postbiotic compound either in a dry and/or an aqueous form improved the health, performance, and immunity of colisepticaemic broiler chickens | Abd El-Ghany et al. (2022) |
| 2 | 0.2% postbiotic and 0.2% paraprobiotic | Broiler chicks5 wk | - Paraprobiotics and postbiotics revealed a positive influence on the microbiota by supporting the decrease of harmful microbes like the Proteobacteria while increasing beneficial microbes like the Firmicutes.- Paraprobiotics or postbiotics can positively affect the colon mucosa microbiota. | Danladi et al. (2022) |
| 3 | 0.1% Lactiplantibacillus plantarum postbiotics | Broiler chicks6 wk | - L. plantarum postbiotic increased growth performance and mucin production, postbiotic ameliorated immune status and tight junction permeability- It improved beneficial bacteria colonization and gut health | Chang et al. (2022) |
| 4 | 1.0% inulin+different levels of postbiotic (0.15%, 0.30%, 0.45%, 0.60%) | Broiler chicks6 wk | - The level of 1.0% inulin+0.15% postbiotic had the optimal level- Combinations of inulin and postbiotic increased body weight and immune response | |
| 5 | 0.2%, 0.4%, and 0.6% postbiotic derived from Lactobacillus animalis | Quails5 wk | - Postbiotic 0.4% increased body weight and body weight gain- Postbiotic promoted the health of quails by modulating gut microbiota | Kareem (2020) |
| 6 | Postbiotic product (1 ounce/gallon of fresh water) | Broiler chicks3 wk | - Postbiotic administration boosts immunomodulatory responses in the gut.- Postbiotic reduces disease pathogenesis following challenge. | Johnson et al. (2019) |
| 7 | 0.2%, 0.4%, 0.6%, and 0.8% cell-free supernatant (postbiotic: L. plantarum RI11) | Broiler chicks6 wk | - Postbiotic RI11 augmented plasma glutathione, catalase, and glutathione peroxidase, and boosted zonula occludens-1, mucin 2, IL-10, and mRNA expression.- Postbiotic RI11 declined heat shock protein 70 mRNA expression and plasma tumor necrosis factor alpha, IL-8, alpha-1-acid glycoprotein. | Humam et al. (2019) |
| 8 | Saccharomyces cerevisiae fermentation based postbiotic (SCFP) at 1.5 kg/ton (0–21 d) and 1.0 kg/ton (22–32 d) | Layer pullets | - SCFP decreased Salmonella Enteritidis in the Layer Pullet’s Ceca.- SCFP decreased the proportion of ceca with enumerable S. Enteritidis. | Gingerich et al. (2021) |
| 9 | L. plantarum RG14 and RI11 strains/cell free supernatant | Broilers | - Positively enhanced immune response- Reduced the proinflammatory responses,- Reduced (p<0.05) Enterobacteriaceae count. | Kareem et al. (2016) |
| 10 | L. plantarum RI11, RG14, and RG11 strains/cell free supernatant (postbiotic component) | Laying hens | - Reduced plasma and yolk cholesterol concentrations | Choe et al. (2012) |
| 11 | L. plantarum strains/cell free supernatant (postbiotic component) | Laying hen and broilers | - Reduced faecal Enterobacteriaceae | |
| 12 | L. plantarum strains/cell free supernatant (postbiotic component) | Broilers | - Higher growth hormone receptor (GHR) messenger RNA (mRNA) | Thanh et al. (2009) |