Answer to the White and Yellow Precious Riddle

Answer to the Puzzle of the Day 2195 : White and Yellow Precious Riddle
Here is the refresher to the puzzle

Riddle : I am white, I could be yellow.
You need me for the lifetime.
I am free the first time and the second time,
But the third time is going to cost you money.

What am I?

Now the Answer : 

Answer : Teeth
Explanation :
Teeth are white but yellow when dirty. You will need them for life to eat
They grow twice in your lifetime and never again. Because of which you will need to visit the dentist for a denture and get fake ones by paying money.

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