If you're intrigued by DNA nutrition testing and want to see which foods may help you reach your performance peak, these three labs can get you started.

» For $495, Genelex will send you a Sciona self-testing kit. After the lab work is completed, a nutritionist will call to explain your results and how to alter your diet to take advantage of what the test found. 800-523-3080, www.genelex.com

» Like Sciona, Global DNA Solutions looks at 19 genes in its analysis. Included in the $695 price is a two-hour phone consultation with a staff nutritionist, followed by regular checkups over the phone to see how you're progressing. 866-810-3809

» Great Smokies Diagnostic Lab conducts more than 125 different medical tests, including five for genomics. They require a licensed nutritionist, chiropractor, or doctor to order the test for you. Cost varies with the practitioner. 800-522-4762, www.gsdl.com