Rooibos tea- flouride?

I've really gotten in Rooibos tea. I started drinking it for its health benefits which are many:

Green Rooibos tea is unfermented Rooibos tea and it contains 100 times more anti-oxidants and 50 times more SOD than Green Tea.

BUT, the tea naturally contains flouride.

"Rooibos also supplements calcium, manganese and especially fluoride..."

Is flouride that is found naturally in herbs and plants always a problem necessarily?

Thanx

XOXOXO

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