This sounds too good to be true. Where can I find published, peer-reviewed studies in reputable sources about measuring oxidative stress and toxin exposure that back up BreathMap's claims?

There's a wealth of research out there to back up exactly what we do. Some of the most compelling data we've found come from the following studies:

The potential of the hydrocarbon breath test as a measure of lipid peroxidation (http://www.ncbi.nlm.nih.gov/pubmed/7959173)

Breath alkanes as a marker of oxidative stress in different clinical conditions (http://www.ncbi.nlm.nih.gov/pubmed/10802218)

Benzene levels in ambient air and breath of smokers and nonsmokers in urban and pristine environments (http://www.ncbi.nlm.nih.gov/pubmed/3735457)

Breath Biomarkers to Measure Uptake of Volatile Organic Compounds by Bicyclists (http://www.ncbi.nlm.nih.gov/pubmed/27097118)