Seaweeds are macroscopic multicellular algae that have been used as food since ancient time. It was originated in Japan and then China particularly to the people who lived near the coastal areas. In addition to its nutritional value, seaweeds are rich source of structurally diverse bioactive compounds including polysaccharides, phlorotannins and pigments. Because of this, the demand increases in the global trade wherein Korea is the major producers. In traditional Korean cuisines seaweeds used as soup, snack, pickle, vegetable and salad. Hence, this present research focuses on the edible green and red seaweeds found in Korea.
Green and Red Seaweeds Bioactive Compounds
Green seaweeds used to treat stomach disorders and hangovers because it contains 55% polysaccharides, 30% proteins, 13% ash and 1% lipids. It also have micro mineral such as calcium, manganese, iron, selenium, sodium, phosphate and potassium. Additionally, green seaweeds also used to treat wastewater and have significant medicinal value for rheumatism, high blood pressure and diabetes. In recent findings it has potentials bioactive properties to treat cancers and diabetes mellitus. Also it contains essentials oil to inhibit foodborne pathogens, anti-inflammatory, antioxidant and blood lipid reduction. Moreover, it has been used in traditional medicine for sunstroke, urinary diseases and hyperlipidemia. It is also useful to reduce eutrophication in mariculture waters that helps the survival rate productivity of shrimps and prawns.
Red seaweeds are the main source of hydrocolloids and contain vitamins A, B and C. It is also a rich source of carbohydrates particularly galactose and glucose. These red seaweeds are popularly known in agar production. And used as a raw material in bio-ethanol industry due to its high level of ethanol extraction efficiency. Likewise, both red and green seaweeds contain antioxidants properties due to its hydroxyl radical scavenging activity. That is responsible for neuro-protection against oxidative stress. In all, seaweeds have potential properties for anticancer, anti-diabetic, anti-obesity, anti-inflammatory, antimicrobial and anti-coagulant.
Therefore, seaweeds are vital source of food and medicine on different applications. The presences of secondary metabolites are potential to develop as functional materials due to its promising bioactive properties. Korea is one of the biggest consumers and producers wherein people mostly incorporate seaweeds on daily diets. This research suggests that increase consumption offers healthy benefits as well as utilization of seaweed materials as functional ingredients.
Source: Prepared by Joan Tura from BMC Fisheries and Aquatic Sciences
Volume 21:19, 6 April 2018