Do supplements like Marine-D3 with Ecklonia cava extract live up to anti-aging claims?

Latest Update

Fake Ecklonia cava?

Medically reviewed and edited by Tod Cooperman, M.D.

Written by Amy Malec

Latest Update November 20, 2025 ⓘ

Answer:

Marine-D3 (distributed by UnCommon Nutrition – formerly Marine Essentials) is promoted on the company's website to "fight aging," "repair and protect cells," "control blood pressure," "aid vision and memory," and "ease joint pain." The website also claims that Marine D-3 "prevents gunk from sticking and keeps arteries clear."

But what is the evidence behind Marine-D3 and one of its key ingredients: Ecklonia cava (brown seaweed) extract (also marketed as Seanol-P)?

Sign in as a member to find out. We've also included information about several other Ecklonia cava supplements – many of which may not contain what they claim.

+ — 5 sources

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