It was alleged, but never proved.  Until now.  Via Hot Air: 

It had always been alleged, but they couldn’t prove it at the time due to the limits of forensic testing.

They can prove it now.

No matter how bad you think they were, they were worse.

The article says:

Tests show that Nazis used human remains to make soap

The Nazis used human fat to make soap during World War II in a Nazi German medical academy located in what is now the Polish Baltic sea port city of Gdansk, Polish war crimes prosecutors confirmed on Friday, pointing to new laboratory tests.

Officials with Poland’s Institute for National Remembrance (IPN) based their findings on a laboratory analysis of a piece of soap found in 1945 in the medical academy in Gdansk run by Nazi German Professor Rudolf Spanner.

A new laboratory analysis of the soap revealed human fat was one of its components, spokesperson for the Gdansk branch of the IPN, Paulina Szumera, told Deutsche Presse-Agentur in a telephone interview on Friday.

Commissioned by the IPN, Professor Andrzej Stolyhwo of the Warsaw Agricultural University found human tissue in the soap.

The piece of soap was used as evidence in the post-WWII Nuremburg Trials where prominent German Nazis were prosecuted for crimes against humanity. At the time, prosecutors lacked the technology to determine whether the soap contained human tissue.

I dont know that this proof changes anything. The allegations have lived on for years.  And the Nazi’s were clearly a depraved bunch.

But on the other hand, it never hurts to remember how depraved they really were.