How much protein do I need per day?

Around 0.8 g per kilogram of body weight for a healthy adult — roughly 56 g at 70 kg. Aim for 1.0–1.2 g/kg if you are over 65 or training hard.

How much CO₂ does going vegan save?

Roughly 0.8–1.5 tonnes CO₂e per person per year in a high-income country, plus a larger land-based carbon opportunity saving.

How much B12 should a vegan take?

Either 50–250 µg of cyanocobalamin daily or 2,000 µg weekly. Both maintain normal status in healthy adults.

Which supplements are genuinely needed?

B12 always; vitamin D in winter at higher latitudes; iodine unless you use iodised salt; algae oil for EPA/DHA is strongly advisable.

Is animal sentience scientifically settled?

For vertebrates, effectively yes; debate now focuses on invertebrates and on the degree of subjective experience rather than its existence.

How much land would a plant-based world free?

Roughly 3 billion hectares, about 76% of current farmland, according to the Poore & Nemecek analysis.

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 3 Climate science 1 Ethics & science 1 Environment 2 Public health 1 Consumer guide 1 Practical 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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Practical how-toBatch cooking: two hours on Sunday, ten meals readyThe most common reason plant-based eating fails is decision fatigue at 7pm. This is the system that removes it.7 min readRead the guide Practical how-toShopping plant-based: a pantry, a list and a label-reading methodA well-built pantry makes cooking a fifteen-minute job. Here is the core list, the price-per-protein maths and the hidden ingredients worth knowing.8 min readRead the guide Practical how-toHow to build a plant-based plate that fills you upMost people who feel hungry or tired after switching made the same three errors. Here is the plate formula that fixes them.6 min readRead the guide Practical how-toHow to talk about this without losing the roomAdvocacy research is fairly consistent about what changes minds: questions, specificity and respect. Here is a method you can use at a family dinner.7 min readRead the guide

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