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When Memory Fails: The Hidden Flaw in Nutrition Studies and What It Means for Peruvian Diets
Try to remember everything you ate last week. Not just the obvious meals—the lomo saltado on Tuesday, the ceviche on Saturday—but the handful of canchita you grabbed while waiting for lunch, the spoonful of sugar you stirred into your morning emuliente, the exact size of that sweet potato. For most of us, the task is […]
When Food Diaries Lie: The Hidden Flaws of Self-Reported Nutrition Data in Peruvian Health Research
In nutrition science, the food frequency questionnaire and the 24-hour dietary recall are the old reliables. They ask people to remember what they ate—how many times last week did you have quinoa, a slice of papaya, or a glass of chicha morada? On paper, these tools seem like a straight path to understanding how diet […]
The Ceviche Principle: Why Self-Reported Nutrition Studies Often Leave a Bitter Aftertaste
The Ceviche Principle: Why Self-Reported Nutrition Studies Often Leave a Bitter Aftertaste Picture this: you’re trying to nail down your grandmother’s legendary ceviche recipe. You ask a hundred home cooks to write down exactly how much lime juice, ají limo, and salt they used, and how long they let the fish marinate. Some will guess […]
Por qué el título de un artículo científico puede engañarte tanto como un titular de prensa: Una guía desde la investigación de enfermedades tropicales
El semestre pasado, corregía revisión bibliográfica de mis estudiantes de quinto año. Veintitrés trabajos. Dieciséis citaban un artículo de 2019 sobre Trypanosoma cruzi en Arequipa con una frase que me detuvo en seco: «se demuestra que la transmisión vectorial urbana de Chagas está controlada». El artículo no demostraba eso. El título decía algo como «Evaluación […]
When Food Diaries Lie: The Hidden Flaws in Self-Reported Nutrition Studies
When Food Diaries Lie: The Hidden Flaws in Self-Reported Nutrition Studies By Dr. Luz Mendoza | April 8, 2025 Keeping a food diary seems simple, but our minds play tricks on us. (Photo by Mikhail Nilov from Pexels) Picture a pachamanca in full swing. You’ve layered the hot stones, the marinated lamb, the sweet potatoes, […]
Why Your Food Diary Might Be Telling Fibs: The Messy Truth About Self-Reported Nutrition
Imagine a bustling market in the Sacred Valley at dawn. A vendor scoops a heap of glistening lúcuma onto a scale, while nearby, a traveler frowns at a food diary, trying to remember if she ate two papas rellenas or three. That little notebook—or its digital cousin—is the shaky foundation of most nutrition science. For […]
Why Your Ceviche Won’t Tell You the Truth: The Messy Reality of Self-Reported Nutrition Studies
Try to remember, with absolute precision, how much cilantro you tossed into last Sunday’s ceviche. A heaping spoonful? A pinch? Or did you just grab a handful from the market bag and hope for the best? Now imagine a researcher in Lima asking you to recall every snack, every sip of chicha morada, and every […]
The Long Wait: What Happens to Tropical Disease Data Between Field Collection and Public Understanding
En 2014, un equipo de investigadores peruanos empezó a recolectar datos sobre leishmaniasis cutánea en comunidades ribereñas de Madre de Dios. Los casos venían subiendo desde 2012, empujados por la migración de trabajadores hacia zonas de extracción minera y forestal recién abiertas en la frontera con Brasil. Los datos eran sólidos: diagnósticos parasitológicos confirmados, registros […]
The Hidden Flaw in Nutrition Science: Why Self-Reported Data Keeps Leading Us Astray
I still remember the first time I really started to question the backbone of a big nutrition study. It was a large, well-funded project linking high-fiber diets to a lower risk of heart disease. The conclusion looked airtight, the statistics were polished, and the press release was already drafted. But as I sat with the […]
The Honest Plate: Why Your Food Diary Might Be Telling Stories
After years of sitting across from patients, reviewing their carefully kept food logs, I’ve come to see these diaries as something more than a simple record. They’re a mirror of our best intentions, a place where we often write down the person we want to be rather than the person we were at 10 p.m. […]