Bone health concerns for millions of U.S. children

U.Sexperts warn that drinking less milk
,less sun and lack of physical activity could damage the boneshealthof millions of American children,of rickets,and osteoporosis as they reach old agein a study funded by the U.Sgovernment,scientists
performed bone scans on 1,500 healthy children between the ages of 6 and 17and tracked bone density over the next seven years,
the media reportedTuesdayAlmost half of the peak bone density in humans is formed in adolescence, and scientists want to know what effect poor bone growth during this period will be in a few decadesExperts point out that some early data suggest that a 10 percent deficiency in bone density at the end of puberty can increase the risk of osteoporosis and fractures in the future by up to 50 percent The survey showed a 56 percent increase in American girls with broken arms and 3
2 percent more boys than 40 years ago This is not only due to the lack of calcium-added milk, but also because of the lack of vitamin D necessary for the body to absorb calcium And sun exposure helps the body synthesize vitamin D It is estimated that 30 percent of U.S 10-year-olds don't have enough vitamin D intake, which is related to americans spending more time on computers and fewer outdoor activities and physical education classes