Soluble Corn Fiber May Boost Calcium Absorption in Postmenopausal Women
In mature adults, bone breakdown occurs more quickly than bone formation, making calcium particularly important as people get older. A recent study suggests that taking a daily soluble corn fiber supplement may help boost calcium retention in postmenopausal women by up to 7%.
15 healthy postmenopausal women participated in the study. They were given 0, 10, or 20 grams of soluble corn fiber daily for 50 days. After those first 50 days, there was a washout period followed by a crossover to a different dose. The researchers measured bone calcium retention via urinary levels of the rare radioisotope 41Ca. 41Ca is stable and long-lived, and can be measured very accurately via accelerator mass spectrometry.
At the conclusion of the study, the researchers found that 10 and 20 grams of soluble corn fiber were associated with bone calcium retention of 4.8% and 7%, respectively. They also noted significant increases of the bone formation marker, bone-specific alkaline phosphatase.
Researchers from Purdue University and Indiana University conducted the study. It was published online ahead of print on July 27, 2016, in The American Journal of Clinical Nutrition.
Previous studies have linked soluble fiber consumption with blood sugar regulation, prevention of heart disease and breast cancer prevention.
If you are unable to find a corn fiber supplement, other sources of soluble fiber include beans, oatmeal, carrots, apples, lentils, flaxseed, berries, and nuts.