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Topic hub · Nutrition & Health

Iron, B12 & Deficiency Prevention

Most plant-based deficiency problems are logistical, not dietary. This hub explains non-haem iron absorption, vitamin C pairing, B12 dosing schedules, ferritin testing and what symptoms warrant bloodwork.

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A farmed salmon in an aquaculture pen, highlighting issues of farmed salmon welfare.
Featured Stories

Farmed Salmon: Cognition, Welfare, and the Nordic Iron Deficiency Anemia Debate, 2024

Farmed salmon, a staple in Nordic diets, presents complex welfare challenges and nutritional considerations, especially concerning iron deficiency anemia on vegan diets.

By Ingrid Bergstrom · 7 min read

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Frequently asked questions

How much B12 do vegans need?
Common guidance is either around 50 mcg daily or 2,000 mcg weekly of cyanocobalamin, since absorption efficiency falls sharply at higher single doses.
How can I absorb more plant iron?
Pair iron-rich foods with vitamin C, and separate tea, coffee and calcium supplements from iron-heavy meals by an hour or two.

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Read across the whole subject

Compare explainers, investigations and practical guidance within this hub. A shared topic does not mean every result is interchangeable: check the species, country, date and methods behind each claim.

Reference sources

Egrets in a coastal wetland.
Egrets in a coastal wetland.

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