Using human placentas to treat cancer

Praise be to Allah.

We put the following question to Shaykh Muhammad ibn Saalih al-‘Uthaymeen:

Question:

What is the ruling on keeping the placenta to treat cancer and remove facial wrinkles?

He replied as follows:

It seems that there is nothing wrong with it so long as there is proof that it is an effective treatment.

Question: does the rule that whatever is taken from a living being is dead apply in this case?

Answer: dead matter of human origin is taahir (pure).

Question: and if it is of no use, should it be buried, or can it be disposed of in any place?

Answer: it seems that it is the same as nails and hair.

And Allaah knows best.