Seaweed belongs to a group of organisms of enormous ecological importance and represents a significant part of the world's biodiversity. Marine algae have always been of great interest in Asian culture as marine food sources (Rioux et al., 2009). On the contrary, seaweed represents an important economic resource especially in Eastern and Southern Asian countries where it is not only widely harvested but also intensively and widely used in human nutrition (Caliceti et al., 2002). They can be classified as green algae (Chlorophyta), red algae (Rhodophyta) and brown algae (Phaeophyta) depending on their chemical and nutritional composition (Dawczynski et al., 2007). Furthermore, the seaweed industry uses tons of wet seaweed, both wild and cultivated, every year (Dhargalkar and Verlecar, 2009). Marine algae or macroalgae are potential renewable resources in the marine environment and known to be an extremely rich source of bioactive compounds (Chandini et al., 2008). Therefore, algae can be a very interesting natural source of new metabolites with various biological activities that could be used as functional ingredients (Plaza et al., 2008). Biological activities are related to the presence of chemical compounds, in particular secondary metabolites. The presence of these compounds can help predict some traditional uses of medicinal plants (Kamatou et al, 2008). However, new potential areas need to be explored to maximize the effective use of seaweed. The Phaeophyceae or brown algae are a large group of multicellular algae and play an important role in marine environments both as food and for the habitats that constitute them. module. Most brown algae contain the pigment fucoxanthin and various pheophycean tannins which are responsible for their characteristic greenish-brown colour, as their name indicates. Worldwide, there are approximately 1500 species of brown algae that produce large numbers of useful secondary metabolites ( Davis et al., 2003 , Reddy and Urban, 2009 ). Some species are of sufficient commercial importance that they have become the subject of extensive research in their own right. The term cosmeceutical is now commonly used to describe a cosmetic product that exerts a pharmaceutical therapeutic benefit (Choi and Berson, 2006). Therefore, cosmeceuticals are cosmetic products with biologically active ingredients that claim to have medical or pharmacological benefits. Dermatological research suggests that bioactive ingredients used in cosmeceuticals actually have benefits that go beyond traditional cosmetics such as creams, lotions, and ointments (Chen et al., 2005). There are numerous synthetic components that have been widely used as ingredients for cosmetics.
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