Brown seaweed extract, also known as phlorotannin extract, is derived from various species of brown seaweed. It is often used in protein powders due to its high content of antioxidants, including polyphenols and phlorotannins. It has been studied for its potential to aid in weight management, as it may reduce fat absorption and promote fat breakdown. It may also have anti-inflammatory effects and improve gut health by increasing the growth of beneficial gut bacteria.
In terms of safety, brown seaweed extract is generally considered safe for most people when taken in appropriate amounts.