If you're planning to assess your genomic health risks, keep this in mind: The results you get aren't a one-stop shop for your future health. There are still limitations to the tests – too few dots to connect, too few identified genes, too little science to calculate general risks any more accurately than by conventional criteria, such as family history, blood pressure, weight, and cholesterol levels.
The best tests today do, however, shed light on some hidden risks from variations in your genes called SNPs. Examples include a vitamin-D receptor that can tell you if you're predisposed to needing more vitamin D, and a gene that leads to atrial fibrillation, a common yet serious kind of irregular heartbeat that often goes undetected. Knowing about these kinds of gene variations can be invaluable and may even save your life.