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Related Experiment Videos

Antioxidative activities in some common seaweeds

X Yan1, T Nagata, X Fan

  • 1National Food Research Institute, Tsukuba, Ibaraki, Japan.

Plant Foods for Human Nutrition (Dordrecht, Netherlands)
|February 9, 1999
PubMed
Summary

Seaweeds possess potent antioxidant properties, effectively scavenging free radicals. Certain species like Rhodomela teres show significant activity, suggesting their potential health benefits in preventing aging and disease.

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Area of Science:

  • Marine Biology
  • Biochemistry
  • Phytochemistry

Background:

  • Dietary antioxidants from plants are linked to disease prevention and anti-aging effects.
  • Free radical scavenging is a key mechanism for antioxidant activity.
  • Seaweeds are a potential source of novel bioactive compounds.

Purpose of the Study:

  • To evaluate the free radical scavenging activity of 27 common seaweed species.
  • To identify seaweed species with significant antioxidant potential.
  • To compare DPPH and hydroxyl radical scavenging abilities.

Main Methods:

  • Sequential extraction method was used to isolate compounds from seaweeds.
  • 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay was employed to measure free radical scavenging activity.
  • Deoxyribose assay was used to assess hydroxyl radical scavenging capacity.

Main Results:

  • DPPH scavenging activity was observed in 15 out of 27 seaweed species.
  • Gelidium amansii, Gloiosiphonia capillaris, Polysiphonia urceolata, Sargassum kjellmanianum, Desmarestia viridis, and Rhodomela teres exhibited the strongest DPPH scavenging activity.
  • Nearly all tested seaweed species demonstrated good hydroxyl radical scavenging ability, with Rhodomela teres and Chorda filum being the most potent.

Conclusions:

  • Common seaweeds are a rich source of antioxidants with significant free radical scavenging capabilities.
  • Specific seaweed species, particularly Rhodomela teres, show high potential as natural antioxidants.
  • These findings support the investigation of seaweeds as functional food ingredients or therapeutic agents.

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