This is probably not what you would expect on a fitness center’s blog. However, my concern is for everyone’s overall health, not just your fitness. PLEASE read and be aware…
While recently conducting research, I came across information that is a cause for alarm. You may be aware of concerns about BPA – bishpenol A – a common additive to some types of plastic. There’s several reasons to be concerned about this chemical and the potential for adverse health effects. The following is a quote directly from a research paper prepared jointly by the U.S. Department of Health and Human Services, National Institutes of Health and the National Cancer Institute entitled “REDUCING ENVIRONMENTAL CANCER RISK”:
Of the many known and suspected EDCs (Endocrine Disrupting Compounds), bisphenol A (BPA) has received perhaps the most public attention in recent years (see also Part I, p. 18). BPA is used in numerous products, including baby bottles and food and beverage can liners. It disrupts the endocrine system because it acts as a weak estrogen. Extensive research has linked BPA to breast cancer, obesity, diabetes, and other serious medical problems.88,92 The Center for the Evaluation of Risks to Human Reproduction concluded in 2008 that there is “…some concern for effects on the brain, behavior, and prostate gland in fetuses, infants, and children at current human exposures to bisphenol A.”185
Like BPA, phthalates disrupt normal hormone function by mimicking estrogen. This group of chemicals is used to make
plastics soft and pliable. They are found in a wide array of consumer products, including plastic bottles, IV tubing, toys (including soft teething toys for babies), cosmetics, hair conditioners, and fragrances. Phthalates inhibit normal binding to estrogen receptors and suppress male androgens. In girls, phthalates may cause early puberty and higher breast cancer risk later in life.189 Male fetuses in the first trimester of pregnancy appear to be particularly vulnerable to damage by phthalates, which may cause undescended testicles, hypospadias, and possibly higher testicular cancer risk. In humans, phthalates have been linked to problems with sperm count and sperm quality, and like other EDCs, phthalates are a suspected breast carcinogen.
In summary, we need to be aware of such risks. Many plastic bottles are made with BPA. You should be aware that this chemical will leach into the content of the bottle with time. It will do so even more when exposed to heat or when used for highly acidic contents such as fruit juices.
Most manufacturers are now including labels stating their product is BPA free. You can check this by looking at the recycling numbers on the bottom of plastic bottles. If there is a 7 on the bottle that means it was made with polycarbonates, which often contain BPA. If the bottle has a 1, 2, 4 or 5 it is BPA free.