"Would you use Nanoparticles When Formulating Sunscreens?" I think this question has been up for debate for quite some time now. And the debate still goes on. Each response has its own justification and as you can see by these responses, formulators (and possibly others) have different opinions on whether they can or should be used in today's sunscreen products where chemical sunscreens are to be avoided. But I am glad to see that there was a healthy voter response (almost 300) to this question. But this subject has been under close scrutiny for quite some time now.