You need vitD3 600 to 800 IU per day for 12 weeks

Hello....... A level of 20 nanograms/milliliter to 50 ng/mLisis considered normal... Vitamin do deficiency is commonly seen in these days.. Nothing to worry you take vitamin do tablet for few months it will bounce back to normal .. Dietary deficiency could be the cause .... Have fruits and vegetables . Expose to sunlight ...