Pray tell. What are the proper supplements?
L
Calcium of course is the big one. But lots of older people who used to live inland had worse teeth then those who lived on the coast because Fluoride and Phosphorous are mostly available in sea food.
This was of course pre-Fluoridated water which might have had good intentions but taking any supplement without having a dosage control is not advisable.
If you were going to grow a third set of teeth as an adult proper nutritional supplements would be necessary.