الفهرس 
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Abstract
calcium is an important component of healthy diet and a mineral necessary for life . it plays an importantrole in building stronger denser bones early in life and keeping bones strong and healthy later in life.
The aim of present work was to:
- surveying study on the available calcium content in the different consumed fermented milk products in relationship with the diet importance.
- study the calcium fortification technology and the possibility of producing of calcium enriched yogurt.