Okay I realize nobody has posted on this thread for quite some time but hopefully someone will have an answer to this question.

What is the normal range for B6?

I can't seem to find 2 answers that are the same. My doctor's normal range goes from 20-125 but when I search online I see things like 5-30?! or 30-50?!

My level is 21...so I'm either good or on the low end of normal.

Anybody?