What is BPA?

As I previously mentioned, last week I took at cooking class at a reputable establishment in Chapel Hill. During the class, the instructor demonstrated how to cure salmon by adding salt and herbs, wrapping it in plastic wrap, and then allowing it to marinate/cure for a few days.

While the instructor showed how to wrap the fish, a participant shouted out a question about plastic wrap and BPA. "Couldn't we use something else that doesn't contain BPA and doesn't clog up our landfill?" (At this point I leaned over to my co-worker who lives in Raleigh and has never been to said establishment before and whispered "welcome to Chapel Hill.")

So what is it and should we be as concerned as my fellow cooking class student?

According to the Mayo Clinic:
"Bisphenol A (BPA) is a chemical used in polycarbonate plastic food and beverage containers and in resin linings for cans. Research has shown that BPA can leach into food from these containers and cans. Because BPA appears to cause health problems in animal studies, some scientists are concerned about the risk BPA poses to humans."

Basically, it is the reason why Pyrex glass storage containers and those metal water bottles have become so popular: to avoid BPA exposure. (And to reduce plastic in the landfills....but since this is a food/nutrition site, I'm focusing on the health effects.)

Where is it found?

• Water bottles
• Plastic food containers
  
• Infant bottles
• Compact discs
• and as coating on food cans (amongst other places)

Why are people concerned?

Mainly, there is concern because there is such widespread exposure. The NHANES survey found detectable levels in 93% of 2517 urine samples from people age 6 and older. Data from these surveys are considered to be representative of the US population.

Should we be worried?

While more studies are needed, an NIH group concluded that there is some concern for effects on the brain, behavior, and prostate gland in fetuses and children. There is minimal concern for effects on the mammary gland and an earlier stage for puberty for females. There is negligible concern for exposure for pregnant woman resulting in fetal mortality or birth defects.

It should be noted that other studies have shown a possible link between BPA and reproductive disorders, breast cancer, diabetes, heart disease, and even obesity (although I'm sure that's a stretch.)

In my opinion, it's better to be safe than sorry, especially when there are easy/feasible alternatives. If you agree you can do the following:

• Avoid plastic containers with the #7
• Don't microwave plastic food containers
• Don't wash plastic containers in the dishwasher
  
• Reduce your use of canned foods (a good idea anyway!)
• Try to use glass, porcelain or stainless steel whenever possible, especially for hot foods or liquids
• Use infant formula bottles that are BPA free and look for toys that are as well
  

Personally, I use pyrex glass storage containers for my leftovers (even though they tend to disappear when I let Sir Cakewalk take them to work.) I also have 2 non-BPA containing water bottles that I use when working out. When I'm in the office, I use a glass or mug to get water from the fountain. It's cheaper and safer than buying individual plastic water bottles. (Which I personally find a little silly anyway.)

Now go forth and be informed!