TopicsSupplements and minerals
Vitamin B12
For vegan and plant-based diets
The experts we follow agree on this.
Vitamin B12 is essential for plant-based eaters and daily supplementation is a wise choice.
Who is behind it
Voices including a molecular biology PhD, a nutritional sciences PhD and a licensed acupuncturist and clinician-educator.
How strong the research is
Backed by some published research, and by what the experts see in practice.
In their words
“For vitamin B12, there's a peculiarity about its digestion that you can only absorb a day's worth at any given one time.”
a nutritional sciences PhD
Methyl or hydroxy B12 is the best form for supplementation rather than cheap cyanocobalamin.
Vitamin B12 is the number one concern for daily intake due to tight absorption caps and limited storage capacity.
Vegan children showed lower levels of vitamin B12 and 25 hydroxy vitamin D unless supplemented, which are critical for growth and development.
Injection administration of vitamin B12 resulted in clinical improvement in patients with low CSF vitamin B12 levels.
Vitamin B12 deficiency is easily treated and therapy can reverse brain atrophy and prevent permanent intellectual disability if diagnosed early.
B12 is one of the three labs recommended for women with low energy.
With care
Some of the minds attach conditions. These are worth reading before you begin.
There are many cases where people can be deficient and require more B12.
Where they disagree
Both sides
For
Methyl or hydroxy B12 is the best form for supplementation rather than cheap cyanocobalamin.
a molecular biology PhDAgainst
Oral administration of vitamin B12 was not beneficial in patients with low CSF vitamin B12 levels.
a certified naturopathMost of the minds come down in favour, and the dissent is worth knowing.
Talk it through
Entrain shows what the experts teach, so you can make better decisions with your own clinician. It does not diagnose or prescribe. If something is worrying you, start there.
How this reading was made
Every line here comes from a doctor, scientist or coach speaking publicly, and links to the moment they said it. Entrain listens for where independent experts arrive at the same place on their own, and shows where they part ways. Backed by some published research, and by what the experts see in practice.
None of the statements here come with a declared commercial interest. Last refreshed 23 September 2026.
The research beneath it
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