Is there any restriction on the heavy metal content of Sargassum fusiforme and other seaweeds in China?

Seaweed contains heavy metal arsenic, but the arsenic in Shanghai algae is actually considered harmless in Japan, and it is indeed limited in China. The earliest arsenic removal from Sargassum fusiforme in China is Zhejiang Hae-Woon Kim Biological Co., Ltd., and their Sargassum fusiforme has always been the industry standard and leader, that is, Haijier brand longevity vegetables in the East China Sea.