Proposition of recommendations for prevention of osteopenia in premature infants is presented in this article. In parenteral nutrition in premature infants calcium and phosphorus should be supplemented early in a dose of 80-100 mg/kg/24 h (2-2.5 mmol/kg/24 h) and 43-63 mg/kg/24 h (1.4-2 mmol/kg/24 h) respectively. In enteral nutrition calcium and phosphorus should be supplemented in a dose 90-150 mg/kg/24 h (2.25-3.7 mmol/kg/24 h), and: 45-80 mg/kg/24 h (1.5-2.6 mmol/kg) respectively. Breast milk fortifier is recommended up to the corrected age of 40 Hbd and in case of growth retarded infants - up to 52 Hbd. Vitamin D should be supplemented in a dose of 400-800 IU, particularly in breast fed infants. Vitamin content in formula or fortifier must be taken into account. Active metabolites of vitamin D are not recommended. Physical activities, together with appropriate mineral, protein and energy intake may decrease the risk of osteopenia. Laboratory assessment of calcium and phosphorus homeostasis is recommended every 2 weeks, from 6(th) week of life.