What are the natural sources of vitamin b12? How much B12 need for my 7 months old baby? She have hb e beta thalassemia. Pls advice.

Lot of sources. Vit B12 is a common supplement in a lot of foods such as breads. It is naturally found in plenty of animal-based foods such as meat, liver, eggs, milk &dairy. If the baby has beta thal, the baby should have a pediatrician or hematologist who guides how much B12 the baby needs, if any at all.