When we were developing Type:A deodorant, we knew it did a stellar job of preventing odor. But we wanted to be 100% positive that our clean, non-toxic formula was science-approved.We worked with leading industry experts to perform a thorough review of our formula, starting with individual ingredients and how they worked together in the overall composition. The review covered hazard assessment of cancer, endocrine disruption and other health concerns, particle sizes, and route of exposure, from a range of reputable databases, authoritative lists, laws in other countries and global agencies studying ingredient safety.