The Archdiocese of Cincinnati has denounced the ALS Ice Bucket Challenge—and told students and staff at area Catholic schools not to join in—because the ALS Association supports stem-cell research.

"The beneficiary of the ice-bucket challenge funds a study using embryonic stem cells, which can only be obtained by destroying embryonic life," read a statement from the Archdiocese. "For that reason, we have determined that our schools should not raise money for the ALS Association, and should instead – if they wish – donate to another organization doing ALS research."

But the foundation claims it uses adult stem cells almost exclusively.

"Currently, the association is funding one study using embryonic stem cells, and the stem cell line was established many years ago under ethical guidelines set by the National Institute of Neurological Disorders and Stroke," said the ALS Association's Maegan Bracken. "This research is funded by one specific donor, who is committed to this area of research."

And individual ALS Association donors can stipulate that they don't want their funds supporting a stem-cell study.

Amyotrophic lateral sclerosis, also known as Lou Gehrig's disease, attacks the nerve cells of the brain and spinal cord controlling voluntary motion. As of Wednesday, the Ice Bucket Challenge has raised $31.5 million—more than 30 times what they raised in the same time frame last year—and untold awareness.