Here’s Part IV of the series! It contains information about why zinc oxide is mostly better than titanium dioxide! Check it out and let me know what you think! http://www.futurederm.com/2012/09/06/are-inorganic-sunscreens-better-than-organic-ones-part-iv-level-of-protection-and-practicality/ As always, post either on here or on the FutureDerm page!