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Seaweed supplement could boost sperm quality in infertile men

NCT ID NCT04864314

Disease control Sponsor: Fitoplancton Marino, S.L. 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested whether a daily supplement called TetraSOD®, made from a special marine microalgae, can improve sperm quality in men with unexplained infertility. Eighty men took either the supplement or a placebo for 90 days. The main goals were to see if sperm movement and count improved. The results could offer a simple, natural way to help couples struggling to conceive.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
TetraSOD® (a dietary supplement from marine microalgae)
What this could lead to
If it works, this could provide a natural supplement option to improve sperm quality in men with unexplained infertility.
What could go wrong
This is a small, completed trial with 80 participants. The supplement may not work for everyone, and results need to be confirmed in larger studies.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

80 people

The number who actually took part.

Started

May 2021

Finished

Oct 2024

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

18 to 45 years

Sex

Male participants only

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: * Age: 18 to 45 * Male patients with idiopathic infertility classified with asthenozoospermia, oligozoospermia or oligoasthenozoospermia after seminal assessment. * Not achieving pregnancy after at least one year of intercourse with the same partner without protective measures Exclusion Criteria: * Azoospermia (absence of spermatozoa) or severe oligozoospermia (\< 5 million spermatozoa/ml of ejaculate) * Testicular torsion or prostatitis * Urinary retention and infections * Drug consumption * Hormone treatments * Recent surgical interventions * Diabetes * Kidney or liver disease * Leukocytosis * Antioxidant supplement consumption in the last 3 months * BMI \>30 Kg/m\^2 * Endocrinopathies, hypo and hyperthyroidism * Chromosomal anomalies (XX, XYY, XXY) * Treatments with anticoagulants * Radiotherapy/Chemotherapy * Participation in another clinical study prior to inclusion in this study that could affect the objectives of the current study

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Conditions

The condition(s) this trial relates to.

infertility disorder male infertility oligospermia

As listed by the trial registrant

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

Infertility, male

Contacts and locations

Locations

  • Hospital Clinic

    Barcelona, 08036, Spain

  • Hospital Clinic

    Barcelona, Spain

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