A member asked:

Does chronic constipation lead to lack of absorption of vitamin b12 given in pills? vitamin b12 deficiency causes constipation? chicken or egg first?

A doctor has provided 1 answer
Dr. James Burns answered

Specializes in Emergency Medicine

It's really not: the chicken or the egg because even minor deficiencies of vitamin B-12 can cause anemia, fatigue, shortness of breath and weakness. ... B-12 deficiency can cause decreased appetite, constipation, diarrhea or alternating constipation/diarrhea, weight loss and abdominal pain. Constipation is a minor player if at all.

Answered 5/22/2019

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A member asked:

What causes b vitamin deficiency to lead to lack of energy?

A doctor has provided 1 answer