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Could spirulina and seaweed lower your heart disease risk?

NCT ID NCT07173062

Recruiting now Disease control Sponsor: Universidade do Porto Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 26, 2026 · Updated 1 time

Summary

This study tests whether taking spirulina (a microalgae) or seaweed (Gelidium corneum) supplements for 20 weeks can improve markers of heart health and change gut bacteria in people at high risk for heart disease. The trial includes 150 adults aged 50 or older with conditions like diabetes, heart disease, or chronic kidney disease. Participants are randomly assigned to receive spirulina, seaweed, or a placebo, and researchers measure changes in blood chemicals and gut microbes.

What this could mean

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

Active substance
Spirulina (microalgae) and Gelidium corneum (macroalgae/seaweed) dietary supplements
What this could lead to
If it works, this could point toward a simple, natural way to improve heart health and gut bacteria in people with conditions like diabetes or heart disease.
What could go wrong
This is an early-stage trial with only 150 participants, so results may not apply to everyone. Supplements can have mild side effects, and the benefits may be small or not last long.

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

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Conditions

The condition(s) this trial relates to.

Albuminuria chronic kidney disease chronic renal failure syndrome coronary artery disorder diabetes mellitus myocardial infarction peripheral arterial disease proteinuria stroke disorder

As listed by the trial registrant

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

ALBUMINURIA CHRONIC KIDNEY DISEASE (CKD) CORONARY ARTERIAL DISEASE (CAD) DIABETES MELLITUS MYOCARDIAL INFARCTION (MI) PERIPHERAL ARTERY DISEASE (PAD) STROKE

Contacts and locations

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • Unidade Local de Saúde de São João

    RECRUITING

    Porto, 4200-319, Portugal

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