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紫菜是海藻类的一种，主要成分是水、蛋白质、碳水化合物及少量矿物质。不少人通过观察紫菜的外观与手感，质疑其是否为塑料。但实际上，紫菜的质地与真正的食品材料有明显的不同。\n\n首先，真正的紫菜在干燥后会显得比较轻薄，水分含量高时则柔韧且具有自然的海味。\n\n其次，紫菜在烹饪时会释放出独特的香气，塑料则不会有这种性质。\n\n最后，为了确保所购买的紫菜质量可以选择正规品牌或者在大超市购买，查看其成分标签，并尽量选择智熟知的海产品品牌。如果对此仍有疑虑，可以查看相关质量检验报告或去齐家网查找更多的信息。