Teas that work well with BO

Hi everyone!

Could any of you ladies recommend teas which will not effect hormonal balance -- just something neutral? 

I'm on BO and currently starting spearmint with go get again, but I'm a bit weary as I don't know if it will work well with BO? 

It's winter now and I'm just looking for a tea I can drink daily without it harming my program. 

How do you feel about rooibos tea?

Thank you