|Just say no. Source: Aney.|
Why would a commonly used product cause diseases such as asthma? It's legal, so it must be safe, right? Well, even though BPA only has a six-hour half-life in the body, we are often in contact with it so much that little to no accumulation wouldn't make much difference. Many people also habitually use the same type of products, I have "my brand", you have "your brand". The way that BPA may cause asthma is by interfering with immune function, which may explain the mixed results in research. It may swing the immune response in favour of the T-helper 1 (Th1) cells; in naturopathic circles Th1 dominance is known to put our patients at risk of certain illnesses. Th2 dominance comes with its own risks. Others have shown that BPA could create Th2 dominance. BPA may increase the production of pro-allergic immune chemicals such as IL-4 and IgE, which tell a type of immune cell to start an inflammatory response. BPA may also cause oxidative stress, which has been known to promote diseases (including general aging) for many years. The well-known effects of oxidative stress is why popular health magazines and websites will tell you to drink green tea and eat brightly-coloured fruit and vegetables. It was the first thing I ever heard to do with antiaging, which was why even at 14 I drank green tea more than soft drinks. Overall, while human studies show mixed findings, because of individual differences, there is now more evidence, more reasons to avoid BPA.