Evidence map›Paper›PMID 21854608›Full record

ArticleBMC complementary and alternative medicine2011

High catechin concentrations detected in Withania somnifera (ashwagandha) by high performance liquid chromatography analysis.

Nadia Alam, Monzur Hossain, Md Ibrahim Khalil, Mohammed Moniruzzaman, Siti Amrah Sulaiman, Siew Hua Gan

Open access · goldAbstract read
In one paragraph

Article in BMC complementary and alternative medicine, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
13.1field-weighted citation impact, top 2% of its field
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

35 citing papers in PubMed, 1 synthesis or guideline pooled it, 127 citations in OpenAlex.

  1. Pooled it
  2. Safety and tolerability of Ashwagandha (Frontiers in nutrition · 2026
    Trial
  3. Exploring the efficacy and safety of a novel standardized ashwagandha (Journal of psychopharmacology (Oxford, England) · 2023
    Trial
  4. Observational
  5. Article
  6. Article
  7. Review
  8. Review
  9. Article
  10. Review
  11. The benefits of ashwagandha (Frontiers in nutrition · 2024
    Review
  12. Frontiers in pharmacology · 2024
    Article
  13. Sub-acute toxicity of Ashwagandha (Toxicology reports · 2023
    Article
  14. Review
  15. Article
  16. Protective impacts ofToxicology research · 2023
    Article
  17. Antioxidants (Basel, Switzerland) · 2023
    Article
  18. Article
  19. Review
  20. 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

6 authors at 2 institutions in 2 countries.

Nadia AlamDepartment of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan.
Monzur Hossain
Md Ibrahim Khalil
Mohammed Moniruzzaman
Siti Amrah Sulaiman
Siew Hua Gan
Universiti Sains Malaysia · MYUniversity of Rajshahi · BD

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWithania somnifera is an important medicinal plant traditionally used in the treatment of many diseases. The present study was carried out to characterize the phenolic acids, flavonoids and 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) scavenging activities in methanolic extracts of W. somnifera fruits, roots and leaves (WSFEt, WSREt and WSLEt).

methodsWSFEt, WSREt and WSLEt was prepared by using 80% aqueous methanol and total polyphenols, flavonoids as well as DPPH radical scavenging activities were determined by spectrophotometric methods and phenolic acid profiles were determined by HPLC methods.

resultsHigh concentrations of both phenolics and flavonoids were detected in all parts of the plant with the former ranging between 17.80 ± 5.80 and 32.58 ± 3.16 mg/g (dry weight) and the latter ranging between 15.49 ± 1.02 and 31.58 ± 5.07 mg/g. All of the three different plant parts showed strong DPPH radical scavenging activities (59.16 ± 1.20 to 91.84 ± 0.38%). Eight polyphenols (gallic, syringic, benzoic, p-coumaric and vanillic acids as well as catechin, kaempferol and naringenin) have been identified by HPLC in parts of the plant as well. Among all the polyphenols, catechin was detected in the highest concentration (13.01 ± 8.93 to 30.61 ± 11.41 mg/g).

conclusionThe results indicating that W. somnifera is a plant with strong therapeutic properties thus further supporting its traditional claims. All major parts of W. somnifera such as the roots, fruits and leaves provide potential benefits for human health because of its high content of polyphenols and antioxidant activities with the leaves containing the highest amounts of polyphenols specially catechin with strong antioxidant properties.

Indexed as

CatechinChromatography, High Pressure LiquidPhenolsPlant ExtractsWithaniaCatechinPhenolsPlant Extracts

Identifiers

PMID21854608
PMCPMC3176481
OpenAlexW2131380629

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.