The use of macroalgae, or seaweed, in human diets has a long history, especially in Eastern nations. However, the present interest in these species is driven by their remarkable bioactive and nutritional qualities, but also their abundant availability and underutilization, make them especially alluring to people following alternative dietary patterns like vegetarianism and veganism. Sargassum muticum, also known as Japanese wireweed or Asian seaweed, is considered edible and has been consumed in some cultures, being popular as soup ingredient in Korea. It is a type of brown macroalgae found in marine environments, and it has been introduced to various regions outside its native range, including Europe and North America. Moreover, this species could be helpful to feed animals or as soil fertilizer.

In this study, the nutritional properties of this marine alga were investigated. Nutritional parameters such as protein, sugar and fiber content were analyzed using classical techniques. In addition to these components, the study determined the proximate composition in terms of moisture, fixed and volatile carbon and ash content by thermogravimetry, and the major minerals, including calcium, potassium, and magnesium, using the ICP-OS technique. The results showed a high mineral content (21% of ash), which consisted mainly of calcium (9g/kg dw potassium (77g/kg dw) and magnesium (12g/kg dw). In addition, the study determined the presence of iodine by ICP-MS and 106 mg/kg dw of this important element was quantified in these algae.

The results of this study highlighted the potential nutritional benefits that the tested marine algae. Their composition revealed significant concentrations of vital elements, making them extremely advantageous for human/ animal dietary requirements with possible health benefits.