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Macroalgae are valuable resources for human consumption in many countries. This work reports for the first time a comparative evaluation of the nutritional properties of five edible macroalgae from the genus  Cystoseira , namely  C. humilis ,  C. tamariscifolia, C. nodicaulis, C. compressa  and  C. baccata . For this purpose, their proximate composition was determined in terms of moisture, ash, and total contents of protein, lipids, carbohydrates and mineral profile.  Cystoseira tamariscifolia  and  C. baccata  were the species that in general had the higher ash, protein and lipid contents, while the highest levels of moisture and total carbohydrates were detected in  C. nodicaulis  and  C. compressa .  Cystoseira  species had also high amounts of minerals, especially of potassium, calcium and iron, and a favorable Na/K ratio. The present study shows that  Cystoseira  has a balanced nutritional composition, suitable for human consumption, and that its intake can contribute to a healthy and well-balanced diet.

Proximate biochemical composition and mineral content of edible species from the genus Cystoseira in Portugal