Evidence map›Paper›PMID 34959963›Full record

Trial reportNutrients2021

Goji Berry Intake Increases Macular Pigment Optical Density in Healthy Adults: A Randomized Pilot Trial.

Xiang Li, Roberta R Holt, Carl L Keen, Lawrence S Morse, Glenn Yiu, Robert M Hackman

Open access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Nutrients, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

21 citing papers in PubMed, 40 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Bioactive spectrum of goji berries (Food chemistry: X · 2026
    Review
  4. Journal of pharmaceutical analysis · 2025
    Review
  5. Review
  6. Review
  7. Frontiers in pharmacology · 2025
    Review
  8. Review
  9. Article
  10. Review
  11. Selection and Validation of Reference Genes for Gene Expression inInternational journal of molecular sciences · 2024
    Article
  12. Article
  13. Article
  14. Review
  15. Blue Light-Ocular and Systemic Damaging Effects: A Narrative Review.International journal of molecular sciences · 2023
    Review
  16. Distinct Role ofPharmaceuticals (Basel, Switzerland) · 2023
    Review
  17. Article
  18. Article
  19. Review
  20. 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

6 authors at 2 institutions in 1 country.

Xiang LiDepartment of Nutrition, UC Davis, Davis, CA 95616, USA.ORCID 0000-0003-3417-8475
Roberta R HoltDepartment of Nutrition, UC Davis, Davis, CA 95616, USA.
Carl L KeenDepartment of Nutrition, UC Davis, Davis, CA 95616, USA.
Lawrence S MorseDepartment of Ophthalmology and Vision Science, UC Davis Medical Center, Sacramento, CA 95817, USA.
Glenn YiuDepartment of Ophthalmology and Vision Science, UC Davis Medical Center, Sacramento, CA 95817, USA.
Robert M HackmanDepartment of Nutrition, UC Davis, Davis, CA 95616, USA.ORCID 0000-0003-3505-6461
University of California, Davis · USUniversity of California Davis Medical Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Age-related macular degeneration (AMD) is the third leading cause of blindness worldwide. Macular pigment optical density (MPOD), a biomarker for AMD, is a non-invasive measure to assess risk. The macula xanthophyll pigments lutein (L) and zeaxanthin (Z) protect against blue light and provide oxidant defense, which can be indexed by MPOD. This study examined the effects of Z-rich goji berry intake on MPOD and skin carotenoids in healthy individuals. A randomized, unmasked, parallel-arm study was conducted with 27 participants, aged 45-65, who consumed either 28 g of goji berries or a supplement containing 6 mg L and 4 mg Z (LZ), five times weekly for 90 days. After 90 days, MPOD was significantly increased in the goji berry group at 0.25 and 1.75 retinal eccentricities (

Indexed as

Dietary SupplementsLyciumAgedCarotenoidsEatingFemaleHealthy VolunteersHumansLuteinMacula LuteaMacular DegenerationMacular PigmentMaleMiddle AgedPilot ProjectsSkinCarotenoidsLuteinMacular PigmentZeaxanthinsage-related macular degenerationcarotenoidsgoji berryluteinmacular pigment optical densityzeaxanthin

Identifiers

PMID34959963
PMCPMC8708314
OpenAlexW4226087612

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.