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.   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. "If we help curtail product availability, we can have an impact on the economic gain of those involved in the manufacture of ejiao — both legal and illegal suppliers