Seaweed supplement could boost sperm quality in infertile men

NCT ID NCT04864314

Completed Disease control Sponsor: Fitoplancton Marino, S.L. Source: ClinicalTrials.gov ↗

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.

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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

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Locations

Hospital Clinic

Barcelona, 08036, Spain
Hospital Clinic

Barcelona, Spain

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