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Could a common supplement protect eyes in diabetes?

NCT ID NCT07634991

Disease control Sponsor: Ain Shams University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether N-acetyl cysteine (NAC), a safe supplement, can reduce oxidative stress and improve eye health in people with type 2 diabetes who have mild to moderate diabetic retinopathy. About 76 adults aged 18-70 will take NAC to see if it lowers damage to blood vessels in the eye. The goal is to slow or control the disease, not cure it.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

About 76 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2026

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 70 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients with type 2 diabetes mellitus * Patients with mild to moderate degrees of diabetic retinopathy * Patients over the age of 18 and under the age of 70 years * Patients who voluntarily give their informed consent * HbA1C (glycosylated hemoglobin) less than 10% * FBG less than 240 mg/dl * Body mass index (BMI) less than 40 kg/m2 Exclusion Criteria: * • Patients with any other ophthalmologic conditions than diabetic retinopathy * Patients with previous surgical or laser treatment * Pregnant or breastfeeding patients * Patients using antioxidants. * Systemic anti-VEGF or pro-VEGF treatment within 4 months before randomization * Patients who are currently participating in other clinical trials * Severe liver or renal disease, (AST or ALT \>3 times ULN or Total bilirubin \>3 times ULN), (CrCl\< 60 ml/min) * Current history of drug or alcohol abuse Malignancies

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Conditions

The condition(s) this trial relates to.

diabetic retinopathy

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Diabetic retinopathy (DR)

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • National Institute of Diabetes and Endocrinology.

    RECRUITING

    Cairo, Egypt

  • National Institute of Diabetes and Endocrinology.

    RECRUITING

    Cairo, Egypt

More trials for these conditions

Other studies related to the condition(s) this trial covers.