To sum up bone care...Our bones are replaced once every 5 years... it is a gradual process

• eat enough natural foods that can build up our bones and nerves
• appropriate exercise depending on age
• sleep on good mattresses
• sleep on a good healthy pillow that support the neck and back
• being positive in mind and emotion
• control weight, go for ideal BMI
• prevent our blood being too acidic
• eat enough never too much
• rest enough, and not over sleep
• follow a personalize food pyramid
• drink enough water, good water
• wear comfortable shoes
• prevent strenuous exercises, go for stretching
• go for supplements like glucosamine, double X and calcium magnesium 
• prevent diabetes and kidney problem
• be medicine free
• proper sit and walk posture is a must