Table 1.

Seaweeds polysaccharides and their roles in medicine.

Component	Species	Molecular Weight	Chemical Composition	Doses	Properties/Activities	References
Carrageenan	Tribonema minus	197 kDa	Heteropolysaccharide composed mainly of galactose	250 μg mL−1	Anticancer activity	[33]
Porphyran	Chondrus armatus	f 9.7–34.6 kDa	Mainly composed of 3,6-anhydro-L-galactose	327.3 μg mL−1	Anticancer activity	[34]
Fucoidans	Cladosiphon okamuranus	75.0 kDa	5.01 mg mL−1 of l-fucose, 2.02 mg mL−1 of uronic acids and 1.65 ppm of sulfate	1 mg mL−1	Anticancer activities	[35]
	Fucus vesiculosus	-	Fucose and Xylose	-	Antioxidant activity	[36]
Agar	Gelidium amansii	1.21 × 104 Da and 1.85 × 105 Da	(1–4)-linked 3,6-anhydro-α-L-galactose alternating with (1–3)-linked β-D-galactopyranose	25.6 mg L−1	Antioxidant activity	[37]
Laminaran	Laminaria digitata	-	β-(1,3)-glucan	10 µg mL−1	Antioxidant protection	[38]
Ulvan	Ulva pertusa	83.1 from 143.2 kDa	Rhamnose, and xylose	500 mg kg−1	Antioxidant and antihyperlipidemic activity	[39]
		143.47 kDa	Rhamnose and xylose	1.5 mg mL−1	Antioxidant Activity	[40]