Caffeine levels used to be higher, advised level was set at 400mg when I had my daughter in 2007 and she turned out fine and she was a healthy 8lb er! I still continued to drink tea, but tbh I probably only had a couple of cups a day. I find that it settles my stomach during pregancy and seemed to keep the sickness to a minimum. I have been drinking decaf tea this time around, but I do have coca cola and the occasional chocolate.