Are animals harmed in animal experiments?

I do not support animal testing. Especially if the animals are being tested on for human products like makeup and shampoo and stuff. if its for the humans then theyshould get humans to agree to safe testing practices. If it is for animals then they should use safe and human practices on some animals. But if the product is made for humans then it should not be tested on animals because it could have a totally different effect on humans then it does animals from- an all around animal loving vegetarian