barefūt Essential oils are 100% pure, therapeutic; organically grown, ethically produced and free from chemicals or pesticides. Our oils do not contain fillers, additives, or any other type of dilution. barefūt oils are absolutely pure and every lot is GC/MS tested to ensure quality and purity. The lot number for the essential oil you purchase is visible on the bottle that you may reference at barefut.com to view its GC/MS report.