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Why It’s So Hard to Know What to Eat

4 min readJun 12, 2022

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Photo: Pexels/Ketut Subiyanto

Bombarded with conflicting recommendations from scientists, pseudoscientists, friends and relatives on what foods are the absolute healthiest or the most deadly, best or worst for the environment, ethically acceptable or morally unacceptable, we might sometimes feel like there’s nothing left to eat.

Why is this so hard?

Studying diet and nutrition is no picnic, for starters. It’s impossible to conduct an airtight, systematic, clinical study on how one particular food affects any of us, let alone all of us. A scientist can’t ask test subjects to eat only one thing for weeks or months. And while studies aim to account for “confounding factors” like genetics, demographics, health status and behaviors, it’s never certain whether some unknown habit or circumstance affects results.

That doesn’t make research irrelevant, but it’s nearly impossible for any single nutrition study to prove cause and effect. Over time, though, facts build toward virtually inevitable conclusions, and helpful advice emerges.

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Wise & Well
Wise & Well

Published in Wise & Well

Science-backed insights into health, wellness and wisdom, to help you make tomorrow a little better than today.

Robert Roy Britt
Robert Roy Britt

Written by Robert Roy Britt

Editor of Wise & Well on Medium + the Writer's Guide at writersguide.substack.com. Author of Make Sleep Your Superpower: amazon.com/dp/B0BJBYFQCB