Algal Toxins Resist Boiling In China

Health and market regulatory agencies in Guangdong and Guangxi provinces have issued risk alerts regarding red tides this spring. Risk levels are linked to rising water temperatures and seasonal red tide occurrences. In coastal Guangdong, the high-risk period for these blooms typically occurs between January and May. Rising water temperatures are closely linked to these algal blooms. The source noted that risk characteristics vary across different sea areas. In southern regions, temperatures exceeding 20 to 30 degrees Celsius increase the risk. Algal blooms in northern China are expected to occur primarily during the summer months from May to October when water temperatures are higher. Algal blooms in China pose a risk to seafood safety by indirectly affecting shellfish. Paralytic toxins found in Chinese waters exhibit high heat resistance. Cooking methods such as steaming or stir-frying also fail to fundamentally eliminate the toxicity. Experts advise consumers to purchase shellfish only from regulated channels and avoid areas under tidal bloom warnings. Consumers are urged to inspect shellfish for intact shells and ensure they close when touched.