Assessment of Nutritional Constituents Content and Biomedical Aspects of Five Gracilaria Species: A Multivariate Analysis

ABSTRACTThis study assesses the nutritional aspects of five Gracilaria sp. (G. verrucosa, G. corticata, G. crassa, G. cylindrical, and G. edulis) including their antioxidant and in-vitro anti-diabetic potential. Liquid chromatography-mass spectrometry (LC-MS) reveals the presence of free amino acids. Total phenolic content 13.25 ± 0.39 mg GAE g-1, flavonoid content 44.45 ± 0.36 mg GAE g-1, ferrous ion chelating ability 28.32%, and hydrogen peroxide radical scavenging activity 16.53 ± 0.5% contents were recorded highest in G. crassa, while DPPH activity was recorded highest in G. corticata 33.7 ± 0.35%, and total polyamine content was recorded maximum in G. edulis (2.54 ± 0.27). Polysaccharide yield in red alga Gracilaria sp. varies from highest (25.14 ± 0.6) in G. crassa to lowest (16.99 ± 0.53) in G. edulis. The highest number was 12 types of free amino acids present in G. edulis. The highest α‑amylase (46.80%) was recorded in G. crassa, while the highest α‑glucosidase (80.63%) was observed in G. corticata.KEYWORDS: Gracilaria sp.antioxidant activityα‑amylaseα‑glucosidasepolyaminesphenol compoundsmultivariate analysisprincipal component analysis Authors’ contributionsDK, SA, MK, and DS have a role in the design of the study, performed experiments, analysis, and interpretation of data, and all authors contributed to manuscript writing and approved the final manuscript.Disclosure statementNo potential conflict of interest was reported by the author(s).