Evidence map›Paper›PMID 30375458›Full record

ArticleScientific reports2018

Acidity and Antioxidant Activity of Cold Brew Coffee.

Niny Z Rao, Megan Fuller

Abstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing 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

37 citing papers in PubMed.

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  8. HardtankFrontiers in chemistry · 2025
    Article
  9. Review
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  12. International society of sports nutrition position stand: coffee and sports performance.Journal of the International Society of Sports Nutrition · 2023
    Article
  13. Article
  14. Article
  15. Article
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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

2 authors.

Niny Z RaoDepartment of Chemistry and Biochemistry, Thomas Jefferson University, East Falls Campus, Philadelphia, PA, 19144, USA. niny.rao@jefferson.edu.ORCID http://orcid.org/0000-0003-2073-2690
Megan FullerDepartment of Chemistry and Biochemistry, Thomas Jefferson University, East Falls Campus, Philadelphia, PA, 19144, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The acidity and antioxidant activity of cold brew coffee were investigated using light roast coffees from Brazil, two regions of Ethiopia, Columbia, Myanmar, and Mexico. The concentrations of three caffeoylquinic acid (CQA) isomers were also determined. Cold brew coffee chemistry was compared to that of hot brew coffee prepared with the same grind-to-coffee ratio. The pH values of the cold and hot brew samples were found to be comparable, ranging from 4.85 to 5.13. The hot brew coffees were found to have higher concentrations of total titratable acids, as well as higher antioxidant activity, than that of their cold brew counterparts. It was also noted that both the concentration of total titratable acids and antioxidant activity correlated poorly with total CQA concentration in hot brew coffee. This work suggests that the hot brew method tends to extract more non-deprotonated acids than the cold brew method. These acids may be responsible for the higher antioxidant activities observed in the hot brew coffee samples.

Indexed as

AcidsAntioxidantsBrazilChlorogenic AcidCoffeeEthiopiaHot TemperatureHumansHydrogen-Ion ConcentrationMexicoMyanmarQuinic AcidSeedsAcidsAntioxidantscaffeoylquinic acidChlorogenic AcidCoffeeQuinic Acid

Identifiers

PMID30375458
PMCPMC6207714

What OpenQuestion holds

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Registered trials

None linked

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.