100% Bian Stone, which is a composite of over 40 minerals traditionally used for their healing benefits.
“The effect of Gua Sha treatment on the microcirculation of surface tissue: a pilot study in healthy subjects.”Explore (New York, N.Y.)vol. 3,5 (2007): 456-66. doi:10.1016/j.explore.2007.06.001 https://pubmed.ncbi.nlm.nih.gov/17905355/
