Original sentence: Homeopathic practitioners contend that remedies for diseases can be created by taking substances that can create, in a healthy person, symptoms similar to those of the disease.The end product is often so diluted that it is indistinguishable from pure water, sugar or alcohol by laboratory tests but is still claimed to have an effect on consumers
Edited sentence: Homeopathic practitioners contend that remedies for diseases can be made by taking substances that can create, in a healthy person, symptoms similar to those of the disease.The end product is often so diluted that it is indistinguishable from pure water, sugar or alcohol by laboratory tests but is still claimed to be effective