The scavenging effects of 10 dietary supplements including histidine dipeptide family (Carnosine = Car, Anserine = Ans, whale meat extract = WME containing 8.6% balenine = Bal), Twendee X (TwX), Supaliv (SuP), Twendee Mtcontrol (TwM), vitamin E family (α–tocopherol, Tocovid = Toco), and scallop and ascidian (Hoya) – derived plasmalogens (Plas) on methyl radical (. CH3), hydroxyl radical (. OH), and superoxide anion (O2 -) were examined using electron spin resonance (ESR) method. Car, Ans, and WME significantly suppressed . CH3, . OH and O2 - in a dose-dependent manner. Compared with Car, Ans and WME have higher abilities of scavenging . CH3 and . OH in higher doses of 1000 mg/l and 10000 mg/l. TwM, TwX, and SuP significantly suppressed above three radicals. TwM and TwX have higher abilities of scavenging . OH and O2 - in lower doses of 20 mg/l and 200 mg/l. Additionally, compared with α-tocopherol, a super mixed vitamin E, Toco has higher abilities of scavenging above 3 radicals. There is no big difference found between the same concentrations of scallop and Hoya-derived Plas in terms of scavenging above 3 radicals, although both have significant scavenging ability. These findings suggest that the intake of multiple dietary supplements is an alternative and promising way of scavenging various free radicals in order to provide us a healthier life.

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