# How prevalent is vitamin B12 deficiency among vegetarians?

The Balance of Health
Canonical: https://thebalanceofhealth.com/sources/pawlak-2013-prevalence-of-b12-deficiency-among-vegetarians
Licence: https://creativecommons.org/licenses/by/4.0/

## status

reviewed

## id

src-pawlak-2013-b12

## slug

pawlak-2013-prevalence-of-b12-deficiency-among-vegetarians

## title

How prevalent is vitamin B12 deficiency among vegetarians?

## authors

- Roman Pawlak
- Scott Parrott
- Sudha Raj
- Diana Cullum-Dugan
- Debbie Lucus

## publication

Nutrition Reviews

## year

2013

## doi

10.1111/nure.12001

## url

https://doi.org/10.1111/nure.12001

## sourceType

systematic-review

## studyType

systematic-review

## topicIds

- nutrients

## pillarIds

- health

## geography

Multiple countries

## keyFindings

- Vitamin B12 deficiency is common among vegetarians and vegans who do not supplement or eat fortified foods, across all age groups studied.

## supportsClaimIds

- claim-b12-supplement-needed

## challengesClaimIds

- claim-vegan-diet-healthier-overall

## limitations

- Studies used different deficiency thresholds and markers.

## quality

strong

## qualityRationale

Consistent finding across many studies and populations.

## Original sources