We just saw a case where a strict vegetarian diet caused prolonged dizziness that modern imaging couldn’t explain. If we can map the entire genome, why can’t we predict these specific, rare nutritional glitches before someone spends six weeks in fear of falling?
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Because mapping the genome is not the same as predicting real-world physiology. Your DNA gives probabilities — not guarantees — and most nutrition-related issues aren’t caused by a single “faulty gene.” They emerge from complex interactions between genetics, micronutrient status, gut absorption, microbiome composition, stress, hydration, hormones, and lifestyle. Modern imaging (MRI, CT) looks for structural damage; nutritional dizziness is usually functional — subtle B12 depletion, iron imbalance, electrolyte shifts, autonomic instability — changes that don’t show up on scans.
In other words, we can read the blueprint, but the body is a dynamic system running on environment, behavior, and time. Rare nutritional glitches are often context-dependent and individualized, and current science (even in 2026) is still far better at detecting disease after it manifests than predicting every personalized vulnerability before it happens.