The algorithm, B.R.I.A.N (Biomarker Research Integrative Analysis Network), determines optimal zones for each of the individual biomarkers. These optimal zones are personalized based on the latest peer-reviewed scientific research, as well as on your unique demographic and lifestyle information. For example, the generic normal range for a man’s level of ferritin, a blood marker for iron, is between 30 and 400 units. InsideTracker recommends that an athlete in his 20s should have a more specific optimal zone of ferritin between 40 and 150 units to achieve optimal performance. B.R.I.A.N also suggests scientifically based nutritional interventions to optimize levels of each biomarker based on the user's unique profile.