Earlier in the report, it acknowledges that the study was done in a lab, and that other factors come into play when other ingredients are used in different cosmetics. The study notes that most allergic reactions are from the preservatives, and this was an early study to find safe and effective alternatives with a lower risk of allergic reactions. My take away on this was that many essential oils and extracts have excellent antimicrobial properties, and are well worth further study, especially since the lab results were so much more impressive than methylparaben. Some of the oils mentioned were not oils most would want or could tolerate in a lotion. But, this study is a great starting point for further testing.