Bone mineralization depends on genetic, nutritional, endocrine, metabolic and mechanical factors. Dairy products form the major source of dietary calcium and vitamin D, both of which are essential for optimal bone mineralization. Osteoporosis is defined as a reduction in bone mass; it is exacerbated by malnutrition, low weight, poor intake of vitamin D and calcium and lack of physical exercise. The purpose of this article is to encourage pediatricians to make an effort about the prevention of childhood osteoporosis.