Evidence map›Paper›PMID 40804967›Full record

ArticleAnimals : an open access journal from MDPI2025

Exploratory Meta-Analysis of the Effect of Malic Acid or Malate Addition on Ruminal Parameters, Nutrient Digestibility, and Blood Characteristics of Cattle.

Leonardo Tombesi da Rocha, Tiago Antonio Del Valle, Fernando Reimann Skonieski, Stela Naetzold Pereira, Paola Selau de Oliveira, Francine Basso Facco, Julio Viégas

Abstract read
In one paragraph

Article in Animals : an open access journal from MDPI, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Leonardo Tombesi da RochaAnimal Science Department, Federal University of Santa Maria, Avenida Roraima 1000, Santa Maria CEP 97105-900, Brazil.
Tiago Antonio Del ValleAnimal Science Department, Federal University of Santa Maria, Avenida Roraima 1000, Santa Maria CEP 97105-900, Brazil.ORCID 0000-0001-8093-7132
Fernando Reimann SkonieskiAnimal Science Department, Federal University of Technology-Parana, Estrada para Boa Esperança km 04, Dois Vizinhos CEP 85660-000, Brazil.ORCID 0000-0002-6493-1141
Stela Naetzold PereiraAnimal Science Department, Federal University of Santa Maria, Avenida Roraima 1000, Santa Maria CEP 97105-900, Brazil.ORCID 0000-0002-1734-303X
Paola Selau de OliveiraAnimal Science Department, Federal University of Santa Maria, Avenida Roraima 1000, Santa Maria CEP 97105-900, Brazil.ORCID 0009-0009-3488-4047
Francine Basso FaccoAnimal Science Department, Federal University of Santa Maria, Avenida Roraima 1000, Santa Maria CEP 97105-900, Brazil.ORCID 0000-0001-8182-9766
Julio ViégasAnimal Science Department, Federal University of Santa Maria, Avenida Roraima 1000, Santa Maria CEP 97105-900, Brazil.ORCID 0000-0003-2169-9570

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The aim of this study was to determine, through meta-analysis, the effects of malic acid/malate addition on ruminal and blood parameters and diet digestibility in cattle. The literature search was conducted in Web of Science, Science Direct, and Google Scholar using the terms "organic acids", "malic acid", "malate", and "bovine". The database was composed of papers published between 1980 and 2023. The average effect of malate/malic acid inclusion was calculated using the "DerSimonian and Laird" random effects model. Meta-regression and subgroup analyses were conducted to explore sources of heterogeneity. Overall, malic acid (MAC) addition did not significantly affect rumen pH (ES = 0.310,

Indexed as

blood metabolitesdietary covariatesmeta-regressionorganic acidruminal pHvolatile fatty acids

Identifiers

PMID40804967
PMCPMC12345532

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.