Chances are, if you’re a regular reader of this column, you care about what you eat and drink. You scan the labels at grocery stores, checking for white flour and white sugar content, artificial colorings, high fructose corn syrup, animal fats and other offenders. But have you ever checked the label on your tube of toothpaste?You should.After all, you brush two or three times a day, we hope, and each time you do you ingest some of the minty paste.