Evidence map›Paper›PMID 26946249›Full record

ReviewNutrition reviews2016

Concentrations of thiocyanate and goitrin in human plasma, their precursor concentrations in brassica vegetables, and associated potential risk for hypothyroidism.

Peter Felker, Ronald Bunch, Angela M Leung

Open access · bronzeAbstract readReview
In one paragraph

Review in Nutrition reviews, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed, 2 pooled it
6.3field-weighted citation impact, top 3% 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

71 citing papers in PubMed, 2 syntheses or guidelines pooled it, 165 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Broccoli sprout beverage is safe for thyroid hormonal and autoimmune status: Results of a 12-week randomized trial.Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association · 2019
    Trial
  5. Article
  6. Review
  7. The role of nutrition on thyroid health and disease: myths and facts.Journal of endocrinological investigation · 2026
    Review
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Review
  15. Article
  16. Review
  17. Article
  18. Horticulture research · 2025
    Article
  19. Article
  20. Article

11 more citing papers are in PubMed but not listed here.

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

3 authors at 1 institution in 1 country.

Peter FelkerP. Felker and R. Bunch are with the D'Arrigo Bros. Co., of California, Salinas, California, USA. A.M. Leung is with the Division of Endocrinology, VA Greater Los Angeles Healthcare System, Los Angeles, California, and the Division of Endocrinology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA. Peter.Felker@darrigo.com.
Ronald BunchP. Felker and R. Bunch are with the D'Arrigo Bros. Co., of California, Salinas, California, USA. A.M. Leung is with the Division of Endocrinology, VA Greater Los Angeles Healthcare System, Los Angeles, California, and the Division of Endocrinology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
Angela M LeungP. Felker and R. Bunch are with the D'Arrigo Bros. Co., of California, Salinas, California, USA. A.M. Leung is with the Division of Endocrinology, VA Greater Los Angeles Healthcare System, Los Angeles, California, and the Division of Endocrinology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
VA Greater Los Angeles Healthcare System · US

Funding

Iodine Nutrition and Thyroid Disease During Pregnancy and LactationK23HD068552 · NICHD · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI LEUNG, ANGELA MEI-TIN · 2011 to 2015
$644k
NICHD NIH HHS K23 HD068552NICHD NIH HHS K23HD068552
6 · The paper itself

Abstract

Brassica vegetables are common components of the diet and have beneficial as well as potentially adverse health effects. Following enzymatic breakdown, some glucosinolates in brassica vegetables produce sulforaphane, phenethyl, and indolylic isothiocyanates that possess anticarcinogenic activity. In contrast, progoitrin and indolylic glucosinolates degrade to goitrin and thiocyanate, respectively, and may decrease thyroid hormone production. Radioiodine uptake to the thyroid is inhibited by 194 μmol of goitrin, but not by 77 μmol of goitrin. Collards, Brussels sprouts, and some Russian kale (Brassica napus) contain sufficient goitrin to potentially decrease iodine uptake by the thyroid. However, turnip tops, commercial broccoli, broccoli rabe, and kale belonging to Brassica oleracae contain less than 10 μmol of goitrin per 100-g serving and can be considered of minimal risk. Using sulforaphane plasma levels following glucoraphanin ingestion as a surrogate for thiocyanate plasma concentrations after indole glucosinolate ingestion, the maximum thiocyanate contribution from indole glucosinolate degradation is estimated to be 10 μM, which is significantly lower than background plasma thiocyanate concentrations (40-69 μM). Thiocyanate generated from consumption of indole glucosinolate can be assumed to have minimal adverse risks for thyroid health.

Indexed as

BrassicaDietGlucosinolatesHumansHypothyroidismImidoestersIndolesIodineIsothiocyanatesOxazolidinonesOximesPlant ExtractsSulfoxidesThiocyanatesThyroid GlandThyroid HormonesglucoraphaninGlucosinolatesgoitrinImidoestersIndolesIodineIsothiocyanatesisothiocyanic acidOxazolidinonesOximesPlant ExtractsprogoitrinsulforaphaneSulfoxidesthiocyanateThiocyanatesThyroid HormonesbroccoliChinese cabbageglucoraphaninglucosinolateindolekalephase II enzymes

Identifiers

PMID26946249
PMCPMC4892312
OpenAlexW2300586201

What OpenQuestion holds

Textmetadata
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.