man I hate to be the one to tell you this but the consesus lately it that this is a sketchy company and that their orals are bunk(it was to good to be true).Many people have stated on other boards that once they e-mailed the company with a complaint or a challenge they stoped returning e-mails. There also seems to be no consistancy in the product-some as you said are chalky, some are hard, some are smaller some are larger. no way to tell until there are tested and those test are posted. Have not used myself so I don't know for shure, I've just seen more negative comments than positive