Bests & Worsts Reviews from Amazon

I have been using this toothpaste for over a year and really like it. However, I just realized in small print on the bottle it says that the clay used in making this toothpaste may contain lead as a natural mineral. I just bought 4 jars and gave them out each to my kids. No where in the description here on amazon does it state that it may contain lead. I quickly took all toothpaste back from my kids. These jars aren't cheap and now I have 4 jars and don't want use them as they may contain LEAD !!!!!