Evidence map›Paper›PMID 27271663›Full record

ArticleNutrients2016

Marginal Ascorbate Status (Hypovitaminosis C) Results in an Attenuated Response to Vitamin C Supplementation.

Anitra C Carr, Juliet M Pullar, Stephanie M Bozonet, Margreet C M Vissers

Open access · goldAbstract read
In one paragraph

Article in Nutrients, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.5field-weighted citation impact, top 12% 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

24 citing papers in PubMed, 37 citations in OpenAlex.

  1. Vitamin C demand is increased after total knee arthroplasty: a double-blind placebo-controlled-randomized study.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2019
    Trial
  2. Review
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Micronutrient Deficiency as a Confounder in Ascertaining the Role of Obesity in Severe COVID-19 Infection.International journal of environmental research and public health · 2022
    Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Review
  18. Vitamin C: A Review on its Role in the Management of Metabolic Syndrome.International journal of medical sciences · 2020
    Review
  19. Review
  20. Observational
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

4 authors at 1 institution in 1 country.

Anitra C CarrDepartment of Pathology, University of Otago, Christchurch, P.O. Box 4345, Christchurch 8140, New Zealand. anitra.carr@otago.ac.nz.
Juliet M PullarDepartment of Pathology, University of Otago, Christchurch, P.O. Box 4345, Christchurch 8140, New Zealand. juliet.pullar@otago.ac.nz.
Stephanie M BozonetDepartment of Pathology, University of Otago, Christchurch, P.O. Box 4345, Christchurch 8140, New Zealand. stephanie.bozonet@otago.ac.nz.
Margreet C M VissersDepartment of Pathology, University of Otago, Christchurch, P.O. Box 4345, Christchurch 8140, New Zealand. margreet.vissers@otago.ac.nz.
University of Otago · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Inadequate dietary intake of vitamin C results in hypovitaminosis C, defined as a plasma ascorbate concentration ≤23 μmol/L. Our objective was to carry out a retrospective analysis of two vitamin C supplementation studies to determine whether supplementation with 50 mg/day vitamin C is sufficient to restore adequate ascorbate status (≥50 μmol/L) in individuals with hypovitaminosis C. Plasma ascorbate data from 70 young adult males, supplemented with 50 or 200 mg/day vitamin C for up to six weeks, was analyzed. Hypovitaminosis C status was identified based on plasma ascorbate being ≤23 μmol/L and the response of these individuals to vitamin C supplementation was examined. Of the participants consuming 50 mg/day vitamin C for up to six weeks, those with hypovitaminosis C at baseline achieved plasma concentrations of only ~30 μmol/L, whereas the remainder reached ~50 μmol/L. Participants who consumed 200 mg/day vitamin C typically reached saturating concentrations (>65 μmol/L) within one week, while those with hypovitaminosis C required two weeks to reach saturation. Regression modelling indicated that the participants' initial ascorbate status and body weight explained ~30% of the variability in the final ascorbate concentration. Overall, our analysis revealed that supplementation with 50 mg/day vitamin C, which resulted in a total dietary vitamin C intake of 75 mg/day, was insufficient to achieve adequate plasma ascorbate concentrations in individuals with hypovitaminosis C. Furthermore, increased body weight had a negative impact on ascorbate status.

Indexed as

AdultAscorbic AcidAscorbic Acid DeficiencyDose-Response Relationship, DrugHumansMaleAscorbic Acidbody weighthuman intervention studyhypovitaminosis Crecommended dietary intakevitamin C supplementation

Identifiers

PMID27271663
PMCPMC4924182
OpenAlexW2408887929

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.