First of all, what is Bisphenol A and what harmful effect does it cause? Bisphenol A (BPA) is a coating inside aluminum cans that protects the beverage content from making direct contact with the metal. At an elevated temperature, BPA may migrate from the aluminum can over to the beverage, thus posing a health risk. Harmful effects from BPA exposure include increased risk of cancer and infertility.
Health Canada recently released a report saying that the BPA levels found inside soft drink plastic bottles and cans are not harmful enough to cause health concerns. The study finds that the tolerable intake amount is 25 micrograms per kilogram of body weight, in a single period of consumption. The average individual (weight = 60kg) would need to consume 7,400 355ml aluminum cans in a single serving to pose a health risk.
The study measured the different levels of BPA found in products and over 85% of tested products contained less than 1 microgram in the aluminum can. Rockstar Energy tested to contain the highest BPA level at 4.5micrograms, while Diet Dr. Pepper tested to contain the lowest BPA level at 0.032 micrograms. For the complete list of tested product, follow this link.
So as the report has confirmed so far, it is safe to drink soft drinks from aluminum cans. Drink as much as you can. =)