Biomarker tests are getting better and better, and so are the athletes who use them, according to a recent piece from TrainingPeaks: “How Advanced Biomarker Testing Is Transforming Athlete Performance.” Already, they offer a remarkably detailed look under the hood, but is it worth shelling out $500 or so to get a test? Experts say the main benefit of these services lies in their ability to pinpoint exactly what’s holding you back. They can identify your genetic strengths and weaknesses, nutritional deficiencies, and more, informing a highly personalized approach to your wellness and training. For example, the article details how a busy executive and first-time marathoner used a 500-marker test to uncover specific hidden stressors, including deficiencies in vitamin D and omega-3s, plus poor nutrient timing and sleep habits. After addressing these issues, he ran an impressive 3:58 debut marathon. Of course, this level of analysis might feel a bit over the top for some amateur athletes, which leaves you with a choice. For those who want to cover their bases without a specific diagnosis, you can focus on a diet targeting common deficiencies. Healthline’s “7 Nutritious Foods That Are High in Vitamin D” suggests adding fatty fish, eggs, and mushrooms. Similarly, “12 Foods That Are Very High in Omega-3” recommends fuel like walnuts, chia seeds, and fatty fish. Ultimately, pinpointing an unknown problem often requires a specific test, but building a diet rich in these key nutrients is a powerful strategy for anyone looking to optimize their general health and performance.

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