Sunday, January 25, 2009

Day 300- Nutrition Bites

The Unlucky 7 is a recycling number that you want to avoid. Polycarbonate plastic with a No. 7 may contain BPA or bisphenol A. BPA is an estorgen mimin and activates the same receptoos as estrogen. BPA is an endocrine disruptor and may affect the maturing of the brain. It also increases risk of breast and prostrate cancer. Animal studies show that BPA in women affects abnormal behavior and abnormal changes in brain cells. Also, animal studies show BPA increases risk of cancer, obesity, diabetes, or other health problems. A good alternative to polycarbonate is polyethylene terephthalate, which is recycling No.1. No known health effects have been associated with No. 1 PET (Polyethylene Terephthalate - most 2 litre or less drink bottles). Also, No.2 HDPE (High Density Polyethylene -milk bottles), No.4 LDPE (Low Density Polyethylene – bread bags, some cling wraps), and No.5 PP (polypropylene - containers) are safe. However, it is recommended to stick with plastics 1 and 2, because these are commonly the ones that New Zealand local authorities recycle.

-Nutrition Action, April 2008, p.10

Sugar Preacher's Experience
I loved this article. I have been wondering about my cycling water bottles. I was in the store recently, and my friend told me NOT to buy a water jug with a low number. After reading this information, I will avoid No. 7. A few plastics containers that contain No.7 are nalgene-type water bottles, food can liners, disposable cutlery, and sippy cups. If recyclers won't take No. 7 plastics, why should I buy them!


The Rambler said...

Your cycling bottles, being less stiff, take less time to break down than #7 or really low numbers. However, they still break down eventually and therefore can release estrogen like chemicals into your drinking water. So although BPA free is great, when metal works that's even better. Stainless steel like clean canteens are spendy though, so you can try and cut costs by looking for thermos type mugs or canteens at Target- just as good and they will keep your drink cold or hot! If at REI, just make sure you open all your metal bottles and feel the inside first. Unless they say otherwise, many metal drinking bottles are still lined with a thin layer of plastic, much like pop cans are.

The Rambler said...

One mor ething...
Post 2006 studies have come out on soy regarding the phytoestrogens (or plant estrogens) and how they may not be healthy for you. From what I've read, soy by products are in most of our foods now days as stabilizers or to increase protein content. However, the processing involved concentrates these estrogens and may be a contributing factor to lower fertility rates, especially among males (just like cooking and drinking out of plastic). Soy is good in small quantities, but you may be eating it already in greater quantities than you thought and in forms that were initially unpalatable (I've found it in most packaged breads, most cereals, instant waffles, all types of canned foods- anything called texturized vegtable protein or lethicin is soy). Even soy food products should be considered carefully: Tofu was made with a fermenting process rendering it alright, but much tofu nowadays is no longer made that way. Sugar Shunner should look into it and see if what I've heard about soy is actually legit.