SCAM adverstising! Having located a particular research paper I noticed a "banner blog" about teeth whitening...the blogger wrote about obtaining free samples from 2 companies for under $10 shipping fee. Visited one company and could not sign on for the free sample; visited the second company and was able to order my sample for the shipping fee of $6.99. What the company does not clearly tell you is that this is not a free sample - even though that is how they pull you in. Once on their site, the switch happens; I actually signed up... read full review »