Int. J. Environ. Res. Public Health 2009, 6 507 In the U.S., there are many online direct access blood test providers offering a variety of services. Two of the largest that have been in business the longest and have the most sophisticated suite of reasonably-priced tests are DirectLabs (http://www.directlabs.com) and the Life Extension Foundation (http://www.lef.org/bloodtest). Both use U.S.-wide LabCorp facilities to perform the tests, the results of which can be viewed online. 43 tests are offered in the basic $97 package from DirectLabs, organized into a complete blood count panel, thyroid panel, lipid panel, liver panel, kidney panel, diabetes panel and other tests. Beyond the general scan, other packages include panels for anemia, arthritis, cancer, cardiovascular health, hormones, immune system and other tests. There are many benefits to direct access blood testing for the ongoing self-quantifier such as accuracy, low cost, third-party lab professionals and consolidated web data of the current and historical results. At some point it should be possible for individuals to upload LabCorp data to their patient information repositories at health social networks and health portals. As an alternative, there are also many home test kits available for a variety of blood, saliva, urine and other markers, for example testosterone measurement kits (http://www.a1supplements.com/Testosterone-Health-Check-1-Kit-p- 17066.html). Environmental testing The third area to measure in consumer personalized medicine is environmental data, screening for body burden, the cumulative impact of exposure to toxic substances in the environment. Personalized chemical testing services generally focus on pollutants, evaluating the levels of selected pesticides, flame retardants, PCBs, dioxins and other substances. One example is the scan conducted by Axys Analytical Services (http://www.axysanalytical.com) for David Duncan in the ExperimentalMan project (http://www.experimentalman.com/images/chemical_report_card.pdf), an excerpted view of which appears in Figure 11. Environmental screening may also be conducted by hair analysis tests that assess exposure to toxic substances and perform nutritional analysis (http://www.hairanalysisreport.com/hairkit.html). Predictive biosimulation Figure 11. Excerpts of raw genomic data from 23andMe, the environmental scan from the ExperimentalMan project and virtual patient predictive biosimulation output from Entelos.