很多人认为动物们会受到不必要的、残忍的折磨,并对此感到忧虑.他们不相信每一种新药都需要用动物做实验,特别是在拥有庞大数据库和现代的计算机模型的今天.而且还让他们忧虑的是,很多动物实验都是无效的,他们的证据是：虽然曾做过广泛的动物实验,但还是有很多药物（由于副作用大）被撤出市场.特别是他们觉得有些不重要的产品不应该用动物做实验,比如化妆品、洗发水、香皂或者清洗用品等.此外,有些动物保护主义者希望看到更多地用更人道的方法来取代某些动物实验.
翻译一小段话many people are concerned that animals are suffering u
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