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Could pond scum help teens see better? new trial tests alga extract for rare eye disease

NCT ID NCT02018692

Disease control Sponsor: Sheba Medical Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 a powder made from a special alga can help preserve or improve vision in teenagers with retinitis pigmentosa, a genetic eye disease that causes vision loss. Thirty participants aged 12-18 will take the alga extract daily for one year. The study will measure changes in their eye function using standard vision tests.

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 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

About 30 people

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

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Dec 2028

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Ages

12 to 18 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: * Written informed consent to participate in the study. * Adolescent 12-18 years old. * Electroretinogram (ERG) responses compatible with the diagnosis of Retinitis Pigmentosa Exclusion Criteria: * Currently a smoker * Current use of vitamin A/ β-carotene supplements * Active arterial disease within 3 months prior to enrolment in the study, e.g. unstable angina, myocardial infarction, transient ischemic attack, stroke, coronary artery bypass graft surgery * History of malignancy, excepting basal or squamous cell skin carcinoma * Females who are pregnant, or breast feeding, or are premenopausal but not using chemical or mechanical contraception * Uncontrolled hypertension, defined either as resting diastolic blood pressure \>95 mmHg (taken from the mean of 3 readings) or as resting systolic blood pressure \>180 mmHg * History of alcohol abuse or drug abuse or both * Intention to engage in vigorous exercise or an aggressive diet regimen * Uncontrolled endocrine or metabolic disease * Participation in another investigational drug study within 4 weeks prior to enrolment * Serious or unstable medical or psychological condition which, in the opinion of the PI, would compromise the subject's safety or successful participation in the study * Initiation of hormone replacement therapy or oral contraceptive therapy within 3 months prior to enrolment

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Conditions

The condition(s) this trial relates to.

retinitis pigmentosa

As listed by the trial registrant

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

Retinitis pigmentosa

How to take part

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

  1. The places running it

    1 site. 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

  • Goldschleger Eye Research Institute, Sheba Medical Center,

    Tel Litwinsky, 52621, Israel

More trials for these conditions

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