Many people think so, to the point there are people who create medical problems for themselves by drinking large but feasible amounts of 'harmless' herb teas for enjoyment.
Some of them have effects such as lowering or increasing your blood pressure, for example, and that's everyday herb teas from the supermarkets. Not a problem if you drink one or two cups (most effects are small), and not a problem if you're not vulnerable. But if it's all you drink.. well.
Some of them have effects such as lowering or increasing your blood pressure, for example, and that's everyday herb teas from the supermarkets. Not a problem if you drink one or two cups (most effects are small), and not a problem if you're not vulnerable. But if it's all you drink.. well.