A study will be performed on Vitamin D deficient/ insufficient Egyptian children to compare the efficacy of oral and parenteral forms of Ergocalciferol and cholecalciferol in raising serum 25(OH) D levels in these subjects

Inclusion Criteria:

• laboratory evidence of vitamin D deficiency or insufficiency without clinical signs of rickets

Exclusion Criteria:

• vitamin D or calcium supplementation within the last 6 months before inclusion, patients with diabetes mellitus, chronic liver disease and kidney disease, congenital or rheumatic heart disease, malabsorption syndromes, thyroid disease, juvenile rheumatic diseases, or other bone disorders.

After Publishing the research individual data will be available