"We have a lot of data suggesting that BPA might have a lot of adverse effects in influencing hormone metabolism and in influencing development."DW-TV: And here to tell us more about the possible dangers of BPA is hormone expert Josef Köhrle, who pursues research at the Charité Hospital here in Berlin. Mr. Köhrle, how dangerous do you think BPA really is? Josef Köhrle: BPA is one of the top compounds currently of concern for endocrinologists and also for developmental biologists, because it’s such a high production. It's available in our environment, in our products of daily use, and also of medical and nutritive agents, and we have a lot of data suggesting that it might have a lot of adverse effects in influencing hormone metabolism and in influencing development.  You say we have a lot of data, and there have been a lot of studies done on BPA and yet a lot of these studies differe. Some say it might be dangerous, some that indicate it could be dangerous, why can't we get a unified position on BPA? The compound is new to be of concern because we discovered the problem very recently by its mode of action with the steroid hormone system in the cells, and this is for example one of the reasons why the American government in the stimulus grant just recently donated 30 million dollars for BPA, bisphenol-A research. The past experiments which have been done, and they have to be done in animal experiments or from human data, show that there are different mechanisms of actions, and the administration of compound, via the food, via injections, for example, give different results, so we have to analyze what is really the reality scenario. What does this mean for the consumer, for example, I mean, we use plastic spoons, plastic knives, we eat yogurt in plastic containers. Is there a level where you could say, OK, Brent, you're using too much plastic. It's becoming dangerous now. Is there a level? There is currently a limit at an intake of 50 micrograms per da...