In conclusion, in this study, a cost-effective method for detecting iodine content in seaweed using GC-ECD has been developed. The iodine content surveyed was 29.3 e45.8 mg/kg for nori, 93.9e 185.1 mg/kg for wakame, and 241 e4921 mg/kg for kombu. Kombu had the highest average iodine content (2523.5 mg/kg), followed by wakame (139.7 mg/kg) and nori (36.9 mg/kg). Consumption of kombu could easily exceed the DRI value for iodine (0.14 mg/d). Algal products with different iodine concentrations need to be taken into account in the nutri-tional survey for health hazards and benefits evaluation. To prevent excessive consumption, it is imperative for con-sumers to be knowledgeable about the iodine contents in different food groups. Adequate consumption of seaweed is beneficial for health. Iodine fortification with seaweeds of high iodine content will not cause hyperthyroidism if the seaweed is prepared by boiling in soup with abundant goitrogenic vegetables. Further studies should be conducted to understand the bioavailability of iodine in humans and to comprehensively profile the goitrogenic contents in different food groups.