The Haydel-Summers collaborative has added clarity to these distinctly muddy waters by screening more than 50 mineral mixtures (and aqueous extractions from them, known as leachates) marketed as health and cosmetic products using pathogens Escherichia coli, Salmonella enterica serovar Typhimurium, Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), and Pseudomonas aeruginosa. Only two mineral mixtures of significantly different compositions (and their leachates) were discovered to possess antibacterial traits.
Article: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0009456
Article: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0009456
