A University of Maryland study shows that while calcium intake is going up in some groups of Americans, teenage girls and young women, especially African Americans, are not getting enough calcium at the time in their lives when calcium is most critical to building bone density.
There's good news and bad news about Americans' intake of calcium says a new study in the April issue of the Journal of the American College of Nutrition.
The good news is, that after years of decline in calcium consumption, the drop has not only leveled off, calcium intake is actually going up in some groups.
The bad news is that teenage girls and young women, especially African Americans, are not getting enough calcium at the time in their lives when calcium is most critical to building bone density.
"The start of adolescence to about age 30 is the most important time to get enough calcium," says the study's lead author, Richard Forshee, of the University of Maryland's Center for Food, Nutrition and Agriculture Policy (CFNAP). "It's that small window of time when they build the bone density that can help prevent osteoporosis in later years."
"These results tell us that we should look at what calcium fortification and supplements can do to increase calcium intake during this critical time," says Maureen Storey, a study co-author and director of CFNAP.
The study examined changes in calcium intake and its association with milk and other beverage consumption over a 10-year period. Other studies have suggested a connection between soda consumption and reduced intake of some nutrients, including calcium.
Using data from 24-hour dietary recalls taken between 1994 and 2002 in the Continuing Survey of Food Intake by Individuals and the National Health and Nutrition Examination Survey, the researchers analyzed data on calcium intake for different age-gender categories.
They found that while non-diet soft drink consumption increased, calcium intake was either unaffected or increased for some groups. Milk consumption declined in some groups, but stayed the same or increased in others. The study's key findings include: