Are You Genetically Predisposed to Be Skinny?

It isn't every day that the first words out of my mouth are "No, thanks--I need to keep my saliva pristine." But for once, coffee wasn't the first thing on my mind when the alarm wailed and my husband rolled out the door to Starbucks. This morning I was going to test my fitness genes with a home DNA kit, and I wasn't supposed to eat or drink anything for 30 minutes before taking it lest I contaminate my specimen--a scenario comically laid out by FitnessGenes CEO Dan Reardon when I call

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