Evidence library

Deep, sourced guides on food, animals and the planet

Long-form explainers built from peer-reviewed research, UN datasets and government dietary guidance — plus practical how-tos you can use the same day. Every number is attributed, every claim is checkable.

Nutrition science 3Climate science 1Ethics & science 1Environment 2Public health 1Consumer guide 1Practical how-to 4

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Nutrition scienceProtein on a plant-based diet: what the evidence actually saysProtein is the most common worry and the least common deficiency. Here is the requirement, the arithmetic, and the research on plant versus animal protein.Read the guide Climate scienceThe climate footprint of food, measured properlyFood causes roughly a quarter of global greenhouse-gas emissions. Life-cycle data shows where inside that quarter the emissions actually sit — and it is not transport.Read the guide Nutrition scienceVitamin B12: the one supplement, explained without hand-wavingB12 is made by bacteria, not by animals or plants. Here is why supplementation is the honest answer, what dose works, and how to test.Read the guide
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Consumer guideWhat welfare labels actually guaranteeFree-range, cage-free, grass-fed, humane-certified: each term has a legal or scheme-specific definition, and most guarantee far less than the picture on the box.8 min readRead the guide

Turn evidence into a week of meals

The 7-day starter plan translates everything above into a shopping list and simple recipes.

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