This is the best tl;dr I could make, original reduced by 75%. (I'm a bot)

> The US Center for Contemporary Equine Studies is suing Amazon for selling products containing a donkey derivative, despite efforts from advocacy groups to halt the practice.

> The lawsuit claims the e-commerce giant is illegally selling products that contain "Ejiao" - a gelatin made from the skin of donkeys and used in various products like health supplements - in violation of California animal welfare law.

> According to the Brooke USA Foundation, a group fighting against Amazon in support of donkey welfare, ejiao acts as "a hard gel that can be dissolved in hot water or alcohol to be used in food or drink, or in beauty products such as face creams." Some advocacy groups and consumers claim companies are deceptively using the substance, contributing to the slaughter and skinning of millions of donkeys a year.

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