Evidence map›Paper›PMID 27189588›Full record

SynthesisThe journal of headache and pain2016

Does monosodium glutamate really cause headache? : a systematic review of human studies.

Yoko Obayashi, Yoichi Nagamura

Abstract readSystematic Review
In one paragraph

Synthesis in The journal of headache and pain, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed.

  1. Review
  2. Article
  3. Observational
  4. Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Additives in Children's Nutrition-A Review of Current Events.International journal of environmental research and public health · 2022
    Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. A review of the alleged health hazards of monosodium glutamate.Comprehensive reviews in food science and food safety · 2019
    Article
  15. Review
  16. Article
  17. Article
  18. Chinese Restaurant Syndrome.Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine · 2017
    Article
  19. Headaches: a Review of the Role of Dietary Factors.Current neurology and neuroscience reports · 2016
    Review
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.

Yoko ObayashiInternational Glutamate Technical Committee (IGTC), Avenue Jules Bordet 142, B-1140, Brussels, Belgium. obayashiy@ajiusa.com.
Yoichi NagamuraFaculty of Health Science, Department of Clinical Nurition, Suzuka University of Medical Science, 1001-1 Kishioka-cho, Suzuka-city, Mie, 510-0293, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although monosodium glutamate (MSG) is classified as a causative substance of headache in the International Classification of Headache Disorders 3rd edition (ICHD-III beta), there is no literature in which causal relationship between MSG and headache was comprehensively reviewed. We performed systematic review of human studies which include the incidence of headache after an oral administration of MSG. An analysis was made by separating the human studies with MSG administration with or without food, because of the significant difference of kinetics of glutamate between those conditions (Am J Clin Nutr 37:194-200, 1983; J Nutr 130:1002S-1004S, 2000) and there are some papers which report the difference of the manifestation of symptoms after MSG ingestion with or without food (Food Chem Toxicol 31:1019-1035, 1993; J Nutr 125:2891S-2906S, 1995). Of five papers including six studies with food, none showed a significant difference in the incidence of headache except for the female group in one study. Of five papers including seven studies without food, four studies showed a significant difference. Many of the studies involved administration of MSG in solution at high concentrations (>2 %). Since the distinctive MSG is readily identified at such concentrations, these studies were thought not to be properly blinded. Because of the absence of proper blinding, and the inconsistency of the findings, we conclude that further studies are required to evaluate whether or not a causal relationship exists between MSG ingestion and headache.

Indexed as

Administration, OralFood AdditivesFood HypersensitivityHeadacheHumansSodium GlutamateFood AdditivesSodium GlutamateChinese restaurant syndrome (CRS)HeadacheHuman studyInternational classification of headache disorders (ICHD)Monosodium glutamate (MSG)Systematic review

Identifiers

PMID27189588
PMCPMC4870486

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.