Hello, my brother is having thalassemia major from 20 yrs, can we give him niacin b3 will it help for him, and the iron level is also high in his body.?

Thalassemia major. He will need to be on iron chelator- that is for sure- to help reduce the iron overload that he has. Discuss this with his doctor- if he is not taking iron chelator agent yet. As far as Niacin b3, - he can actually take vitamin b-complex- once a day . Inside vit b complex- there are vit b12, b6, as well as b2, b3, etc.