Is there any correlation to Vitamin D deficiency and lack of focus in children? I ask because my 12 year old has been struggling with her grades lately, she seems to be forgetful lately and just seems "off" if that makes any sense. She went for her well visit 2 weeks ago and had some blood work done. They called me with the results today and she is extremely low in Vitamin D. Her result was 16. They told me to give her 1000 MG/day. I'm just wondering if these 2 issues could be related. Does anyone out there have any information on this?