What is maintenance dosage of vitamin- d ? my total vitamin d keeps falling to 30 and below every other month, i have to take d capsule 60 k every week for 1 month to bring it back to sufficient levels but it won't stay more then a month after?

Try these steps: get as much sun for 20-30 minutes each day as possible, ingest daily Vitamin D-3 (not D-2), 2,000 units each day, adjust dose as needed to reach level of 50-70 ng/ml., which can be checked in about 3 months. Remember, Vitamin D is fat soluble, so, you may have stores within body but serum levels do not rise until saturation is reached in adipose tissues.