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Old 08-12-2018, 03:18 PM
monstro monstro is offline
Join Date: Mar 2002
Location: Richmond, VA
Posts: 19,743
Vitamin D can cause cognitive impairment. It is possible to get the RDA of dietary vitamin D and still suffer from a deficiency due to problems with absorption.

According to this [url=""]article, iron deficiency can cause problems with attention span, intelligence, and sensory perception.