By when can I start using a toothpaste for my baby? Which ones are good to use?

I have read that we should try to avoid introducing tooth paste before the age of 2 years old. This is because baby may not know how to spit out the toothpaste. It is harmful for baby to consume too much toothpaste which contain Floride.http://www.colgate.com/en/us/oc/oral-health/life-stages/infant-oral-care/article/sw-281474979202192. The above article mentioned that it's good to introduce fruity taste toothpaste but I was advised by Dentist to avoid introducing fruity toothpaste so that kids will not mistaken toothpaste as food.