On the flip side, if you suffer from headaches, stomachaches or toothaches after drinking your morning cup of joe, you might want to switch to a low-acid coffee. It's much easier on your body, and it won't damage your teeth enamel or irritate your stomach lining. Just remember that the pH scale goes backwards, so lower pH levels mean higher amounts of acid. This means that a low-acid coffee would actually have a higher pH level than other brands.
I saw a review for AmazonFresh that said it wasn't the greatest grind for a French Press (not fine enough for full flavor) which made me wonder how it would fair in my AeroPress. And I have to say, it does make a weaker cup of coffee for me than Peets. I use 1 1/2 AeroPress scoops of Peets, but with AmazonFresh, I need at least 2 full scoops to get a similar strength. Therefore the "affordability" factor is tainted. (This is likely not an issue with other coffee making options, but I can't say.)
No study we have seen links prepared or brewed coffee, including espresso, with significant levels of contaminants. Typical is a 2008 Australian study which meticulously tested a wide range of coffee beverages purchased randomly in the Australian food service market and found that “there were no detectable levels in any of the coffee [beverages] sampled. This included all 98 pesticide residues, 18 PAHs, beryllium, mercury and ochratoxin A.” The key findings summary concluded that “The overall levels of chemical contaminants identified in this survey are generally considered to be low and are consistent with those reported in other comparable surveys both in Australia and overseas.”