CClinicalTrials.gg
CompletedNCT04499820OMEDIAUpdated Dec 4, 2025

Effect of OMEGA3 Supplementation in Diabetic Retinopathy

An interventional study of Nutrof and Meralut in Diabetic Retinopathy, sponsored by Centre Hospitalier Intercommunal Creteil. Completed at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-12-04.

Sponsored by Centre Hospitalier Intercommunal Creteil · Not applicable, Interventional, and Supportive care

Phase
Not applicable
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The main objective of this study is to evaluate the efficacy at 6 months of omega 3 supplementation on macular capillary density measured in optical coherence tomography angiography in patients with minimal or moderate non proliferative diabetic retinopathy.

Read the detailed description

Diabetic retinopathy (DR) is a leading cause of vision loss worldwide and is a major public health problem.

In Western countries, the prevalence of DR is estimated to be 35% in diabetic patients, while diabetic macular edema (DME) affects 5% of them.

Currently, apart from the balance of diabetes and other cardiovascular risk factors, no specific treatment is given for the minimal and moderate non-proliferative forms.

  • DHA concentration in the retina can be modified according to the patient's diet.
  • Minimal diabetic retinopathy does not currently benefit from specific treatment outside of diabetic control.
  • Omega 3 are already known for their beneficial effects on the retina, brain and cardiovascular system but their effectiveness has not been tested on diabetic retinopathy.
  • It is therefore a question of evaluating whether an omega 3 supplementation, at a dosage of 1000mg per day, can treat a minimal or moderate stage of diabetic retinopathy.

A study by Salavila et al. has shown that the intake of LCω3PUFA, via a Mediterranean diet, improved the stage of DR in diabetic patients.

02

Conditions studied

  • Diabetic Retinopathy

Browse trials for

03

In context

Diabetic Retinopathy

772 studies on the registry are indexed under Diabetic Retinopathy; 138 are open to participants now.

This study's enrollment of 60 is below the median of 78 across 479 interventional studies indexed under Diabetic Retinopathy.

Browse Diabetic Retinopathy studies →

Lead sponsor

Centre Hospitalier Intercommunal Creteil is the lead sponsor of 131 studies on the registry; 36 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • ≥18 years
  • For women of childbearing age, an effective method of contraception is introduced and monitored throughout their participation in the study.
  • Diabetic microangiopathy: minimal to moderate nonproliferative diabetic retinopathy according to the ETDRS (EarlyTreatment of DiabeticRetinopathyStudy) classification.
  • AV > 6/10
  • One eye included. If both are affected, the eye with the poorer perfusion should be included.
  • Affiliated to a social security scheme

Exclusion criteria

Exclusion Criteria:

  • \< 18 years old.
  • Pregnant or breastfeeding woman
  • Other retinal pathologies that may interfere with the results (Patients previously treated with anti-VEGF, aflibercept or intra-vitreal corticosteroids, history of glaucoma, vitrectomy, retinal laser, epiretinal membrane), choroidal neo-vascularization, uveitis, retinal vascular occlusion, significant macular edema, macular thickness > 280 µm, Eyes with spherical equivalent greater than 8 Diopters, OCTA images not interpretable with many artifacts.)
  • Hypersensitivity to any of the components of Nutrof or Meralut
  • Taking the antivitamin k
  • Known deficit in G6PD-
  • History of renal lithiasis
  • Kidney failure
  • Immunosuppression
  • Chronic Ethylism
  • History of hepatopathy
  • Intracranial tumor, intracranial hypertension
  • Refusal to participate
  • Patient participating in an intervention study.
05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
60 participants (actual)

Study arms

  • Experimental
    NUTROF Group

    vitamin and DHA supplementation

    Dietary Supplement: Nutrof

  • Placebo comparator
    MERALUT Group

    vitamin A, natural flavonoids, lutein and zeaxanthin and no DHA

    Dietary Supplement: Meralut

Interventions

  • Dietary supplementNutrof

    DHA docosahexaenoic acid Omega 3s may be of interest in cases of retinopathies.

  • Dietary supplementMeralut

    vitamin A, natural flavonoids, lutein and zeaxanthin

06

What researchers measure

Primary outcomes

  1. density of the deep capillary plexus in optical coherence tomography angiography (OCTA)

    Macular vascularization consists of three interconnected capillary plexuses: the superficial capillary plexus (SCp) located at the level of the optic fibres and the intermediate (ICP) and deep (DCP) capillary plexuses located respectively at the level of the inner and outer part of the inner nuclear layer.16 OCTA is a non-invasive imaging method of retinal vasculature that allows a qualitative but mainly quantitative analysis of the capillary plexuses. A last parameter that could not be evaluated precisely with the old fluorescein and OCT angiography techniques. OCTA is performed without injection of intravenous contrast agent and has no side effects. Several studies have shown that PCP is the plexus most affected by non-perfusion areas in diabetic retinopathy.

    Time frame: six months

Secondary outcomes

  1. capillary plexus density in OCTA

    capillary plexus density

    Time frame: six months

  2. area (mm²) of the central avascular zone in OCTA

    area (mm²

    Time frame: six months

  3. Visual acuity measurement ETDRS

    Visual acuity

    Time frame: six months

  4. Stage of diabetic retinopathy: minimal, moderate or severe

    Each stage of retinopathy may be associated with some degree of diabetic macular edema; macular edema is classified as minimal, moderate or severe, depending on its location relative to the centre of the macula. It is considered severe when it reaches the centre of the macula. Non-proliferative diabetic retinopathy (NPDR, no neo-vessels) Minimal non-proliferative DR (some microaneurysms or punctiform hemorrhages). * Moderate nonproliferative DR (by exclusion if neither minimal nor severe DRNP) * Severe nonproliferative DR (or preproliferative DR): "4, 2, 1" rule (retinal hemorrhages in 4 quadrants and/or venous dilatations in 2 quadrants and/or AMIR in 1 quadrant)

    Time frame: six months

  5. central retinal thickness (µm) in the 2 groups at 6 months

    central retinal thickness

    Time frame: six months

  6. cholesterol level: Low-density lipoprotein, High-density lipoprotein and total cholesterol

    cholesterol leve

    Time frame: six months

  7. triglycerid level

    triglycerid level

    Time frame: six months

  8. glycated haemoglobin (percent)

    In diabetes, the higher the blood glucose level, the more glucose attaches to hemoglobin and the higher the level of glycated hemoglobin. It therefore indicates whether the blood glucose level was, on average, higher or lower during the 2 months prior to the test. Glycated haemoglobin is measured every 2-4 months. A small amount of blood is drawn from a vein or from the fingertip (micro-method). Glycated haemoglobin (HbA1c) is a fundamental criterion for blood sugar control. It is essential for assessing the risk of complications. 9% Very high 7% Recommended 5% Normal

    Time frame: six months

  9. Diet questionnaire

    questionnaire

    Time frame: six months

07

Study locations

1 site
  • CHI Creteil
    Créteil, Creteil 94000, France
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 4, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04499820
Lead sponsor
Centre Hospitalier Intercommunal Creteil
Collaborators
Laboratoires Thea
Responsible party
Sponsor
First posted
Aug 5, 2020
Start date
Jun 26, 2020
Primary completion
Oct 10, 2024
Completion
Apr 17, 2025
Last update
Dec 4, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2025. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion