The phrase "brown seaweed" refers to a type of algae that grows in the ocean. It is called "brown" because of its color, and "seaweed" because it resembles a plant-like structure found underwater. Full definition
Fibronol contains SEANOL - F, a patented powerful extract derived from a specific species of brown seaweed Ecklonia cava, rich in phlorotannins / polyphenols that have uniquely strong antioxidant properties. (healingedge.net)
The latest gaining popularity in North America is fucoxanthin, a carotenoid compound found mostly in brown seaweed called wakame, which is found in Asia. (weightlosstriumph.com)
This brand adds Sodium Alginate which is a natural polysaccharide product extracted from brown seaweed. (conscioushealth.net)