Hey everyone - I'm not trying to scare anyone or change minds, but I wanted to give you a heads up about something interesting I heard at a lecture today. I work at a fairly prestigious university and occasionally have an opportunity to sit in on scientific lectures, particularly those relating to biology, chemistry, and engineering (mind you, I have an English Literature degree, so most of these things make very little sense to me unless explained in terms I can understand). Today's lecturer is doing research on electrochemical biosensors - tools that enable scientists to test for all matter of DNA- and RNA-based materials, including cancer, as well as bacteria and viruses. She happened to mention that one of the tools they had used was to measure the amount of hormone-disrupting material in both baby formula (leached into the powder via the lining of the can) as well as "BPA-Free" plastic baby bottles.
As many of you probably know, BPA disrupts the endocrine system, specifically acting like an estrogen. The tests they did on BPA-free plastic bottles determined that there was still a high amount of hormone-disrupting chemical compound in the plastic. She said since her lab didn't make the bottles she couldn't know what material was causing the chemical to still exist in the plastic, but the upshot is that even BPA-free bottles are not free from these chemicals. Now, in fairness she did say that these levels were measured after microwaving the bottle, not heating in hot water or a bottle warmer, so I'm not sure if the same results would stand if a different heat source was used. But, food for thought that I wanted to share in case anyone is considering glass bottles (like I have been). They did measure the plastic ones against glass bottles and the glass, of course, had zero of these chemicals.