Can Vitamin B12/D3deficiency or Homocystein imbalance cause lack of interest and poor concentration?

Can Vitamin B12/D3 deficiency or Homocystein imbalance fatigue (abnormal high) cause lack of interest and poor concentration? I am experiencing these symptoms recently and not sure whether it is the case had lab tests done and results show deficiency.

Age: 36
Medications: NA

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Dr. J. Ernesto Recent comment authors
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Dr. Javez Ernesto
Dr. Javez Ernesto

High Homocystein levels indicates your body is possibly unable to properly convert food to energy and could lead to d3 and b12 deficiency. Vitamin B12 deficiency can from a technical point of view cause depression, lack of interest., weakness and fatigue. Treatment includes vitamin B-12 and D-3 supplementation.