I’ve recommended fish oil to literally hundreds of clients. I keep a bottle on my own shelf, the good stuff, the one with the little lemon on the label. So when an omega-3 index test kit landed on my desk last spring — a gift from a lab-tech friend who loves watching me squirm — I pricked my finger, mailed the card, and fully expected a trophy number. The result came back eleven days later: 3.9 percent. Not 8. Not 9. Not even a respectable 6. I was sitting in the same risk zone as someone who considers a fish…