A vegan diet needs a reliable source of vitamin B12, such as appropriately fortified foods or a suitable supplement. The right amount and schedule depend on the person and product. This is general label-reading information, not a prescription, a deficiency diagnosis or a treatment plan.
Start with reliable sources, not an ingredient's reputation
The NHS vegan-diet guide identifies B12 as a nutrient that needs attention. Do not assume that an unfortified plant milk, nutritional yeast or fermented food provides a dependable amount. Check the exact product's nutrition information and serving size.
A packet can be vegan without supplying B12. It can also be fortified while containing another ingredient you avoid. Suitability and nutrient content are separate checks. Our yeast guide explains why not every nutritional yeast is fortified. The breakfast cereal guide covers recipe and vitamin-source checks for another commonly fortified food.
Reference intakes are not supplement doses
Different authorities publish different population reference values. The NIH fact sheet gives an adult US recommended dietary allowance of 2.4 micrograms per day. EFSA's 2015 opinion gives an adult adequate intake of 4 micrograms per day. These are different reference frameworks, not instructions to take interchangeable supplement doses.
| Number on the page | What it means | What it does not mean |
|---|---|---|
| Population reference intake | A framework for dietary intake in a defined group | A personalised supplement prescription |
| Micrograms per serving | The amount declared for the serving specified on the pack | The amount you consume if you use a different portion |
| Supplement schedule | A product- and person-specific dosing pattern | A treatment for a diagnosed deficiency without clinical advice |
General vegan guidance needs the right scope
The Vegan Society's B12 guidance discusses fortified foods and supplements. Its linked guidance describes schedules that differ from population reference intakes because absorption depends on dose and frequency. Follow the complete guidance and the product instructions; do not copy a number from a search snippet into a treatment plan.
Children, pregnancy, breastfeeding, absorption problems, relevant medicines and suspected deficiency require particular care. Ask a qualified clinician, dietitian or pharmacist about an appropriate product and schedule. Do not delay an assessment because an article says the body can store B12 for years.
Compare the packet before buying
- Look for an explicit B12 amount and the serving to which it applies.
- Check the complete ingredients, including capsule material and other added nutrients, for vegan suitability.
- Read the product's directions and warnings rather than assuming all supplements use the same schedule.
- Keep a note of the product and advice you are following, and review changes with the appropriate professional.
VeganCheckr can help inspect ingredient findings. It cannot measure your B12 status, diagnose a deficiency or decide a medical dose. A scan result also cannot replace the nutrition panel; database information can be incomplete or outdated.
Keep the wider diet in view
B12 is one part of nutrition planning, not evidence that every other need is automatically covered. For ordinary shopping, compare plant protein foods and their labels and read our vitamin D ingredient-source guide. Neither page is a personalised nutrition plan.
Source and risk review: October 18, 2026. Prepared with AI assistance from the linked guidance. No independent clinical review, product testing or medical qualification is claimed. Earlier blanket dosing instructions have been replaced with scoped general information.
Check the label on your own product
VeganCheckr scans barcodes and ingredient labels, flags hidden animal ingredients and E-numbers, and shows you the evidence. Free to download on the App Store and Google Play. Optional Premium features vary by platform.
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