Darkness & Bleeding: Avoiding sunlight causes vitamin d deficiency--rickets tends to occur in northern climes in the winter. The main non-nutritional cause of iron deficiency is bleeding, including menstrual blood loss, which is why women are at greater risk for this than men. Men can become iron deficient due to unseen blood loss from stomach ulcers or intestinal cancers.
Answered 11/27/2017
5.2k views
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question