Meta-analysis of organic chromium dietary supplementation on growth performance, carcass traits, and serum metabolites of lambs

Capsaicin as a Dietary Additive for Dairy Cows: A Meta-Analysis on Performance, Milk Composition, Digestibility, Rumen Fermentation, and Serum Metabolites

“…First, articles that had one or more of the following exclusion criteria were removed from the database: (1) studies that did not use CAP or used CAP combined with artificial sweeteners, essential oils, or another dietary additive; (2) studies that did not use dairy cows; and (3) theses, literature reviews, conference proceedings, or books. Subsequently, to be included in the final database, the remaining articles had to meet similar inclusion requirements as those used by other authors [28,32,33]: (1) full-text scientific articles published in English in peer-reviewed journals; (2) studies that used dairy cows as experimental animals; (3) studies that measured and reported data on productive performance, milk composition, nutrient digestibility, ruminal fermentation, or serum metabolites; (4) studies that evaluated the impact of CAP supplementation versus a control treatment using the same basal diet; (5) studies that reported the amount of CAP (mg/kg DM) included in the diet or provided the information necessary to estimate it; and ( 6) studies that included data on treatment means, number of experimental units (n), and standard error of means (SEM) of control (diets without CAP supplementation) and experimental (diets supplemented with CAP) treatments.…”

“…In contrast, Table 3 shows significant Q (p ≤ 0.05) in ADMD, AOMD, ADNFD, and AADFD. However, several authors [28,33,34] recommend not applying meta-regression analysis on response variables reported in less than ten studies because, in these conditions, the power of the test is low. Therefore, meta-regression was not used in the present study.…”