Does mud pack treatment have any chemical effect? A randomized controlled clinical study.

Odabasi E1, Turan M, Erdem H, Tekbas F.
J Altern Complement Med. 2008 Jun;14(5):559-65. doi: 10.1089/acm.2008.0003

https://www.ncbi.nlm.nih.gov/pubmed/18564957