The Claim
Infants on a strict vegan diet, excluding all animal-derived foods, have a higher incidence of vitamin B12 deficiency compared to infants on plant-based diets that include dairy or eggs, while deficiencies in iron, calcium, omega-3 fatty acids, selenium, or zinc occur at lower frequencies.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Infants fed a strict vegan diet without any animal products are more likely to have low vitamin B12 levels than infants fed plant-based diets that include dairy or eggs. Deficiencies in iron, calcium, omega-3 fatty acids, selenium, or zinc are less common in these infants.
See the scientific wording
Infants on a strict vegan diet, which excludes all animal-derived foods, are at considerably greater risk for vitamin B12 deficiency compared to infants on other plant-based diets that include dairy or eggs, with deficiencies in iron, calcium, omega-3 fatty acids, selenium, or zinc occurring less frequently.
Babies who eat only plant foods get no vitamin B12 because plants do not make it. Their bodies use up the small amount they were born with, and without any new supply, their liver runs out. Once the liver is empty, the body cannot make DNA properly or build nerve cells, which causes serious health problems. Other nutrients like iron or calcium are found in plants, so those do not run out as quickly.
What the research says
1 studyStudy: Life-threatening Manifestations of Vitamin B12 Deficiency in Infants on a Vegan Diet
Babies who eat only plant foods—no milk, eggs, or meat—are much more likely to get sick from not having enough vitamin B12 than babies who eat some dairy or eggs. Other nutrients like iron or calcium are less often a problem.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.