My son is 2 year old. I noticed he has 1 white hair

My son has one or two white hair when he was 2 years old too. He is now 4 and I don't find the white hair anymore.

Gray hair occurs with normal aging because the hair cells on the scalp produce less melanin.

Vitamin B-12 deficiency is one of the most common causes of prematurely graying hair

The primary cause of premature hair graying is considered to be genetic.

could be genetic. is it 1 strand or a few strands ?