I don't really know much to be honest, the only reason I would see any problem is that tea has tannins which can inhibit iron absorption, so if you are worried about your LO's iron levels then I wouldn't allow too much, but no clue howmuch is too much, kwim! When I said "regular" tea I meant as opposed to the powdered stuff for babies, so meaning tea bags! I have only given DS herbal teas and rooibos, but that's mainly because we don't buy black tea here because it's horrible!!!