My vitamin B12 is 212 and the lower limit is 211 for normal range. Also 25-OH VITAMIN D (TOTAL) is 5.99 ng/ml which is deficient. Symptoms: Body fatigue, poor concentration and memory for last 6 months. Are my symptoms because of vitamin deficiency. Is it advisable to take cholecalciferol and vitcofol (b12) injection. Please advise the frequency.

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