Calcium, the vital mineral for building and maintaining strong bones, is another "nutrient of concern" and is particularly lacking in adolescent children. Adolescence is a critical time when bones are still growing and the rate at which the body stores calcium reaches its peak. In a new study of soluble corn fiber, researchers from Purdue University evaluated the effect of soluble corn fiber on dietary calcium absorption and retention in adolescents. In a double-blind, randomized-controlled, cross-over study, female and male subjects consumed a daily diet including 600mg of calcium with either 0g or 12g of soluble corn fiber. Researchers found that when the subjects consumed soluble corn fiber, calcium absorption increased by 12 percent compared to the control, but there was no overall effect on calcium balance.
In order to be classified as a fiber, the nutrient must demonstrate a physiological effect, such as bulking. Another physiological effect is fermentation, which promotes gut health by, for example, producing food for the "good" bacteria in the intestines. A randomized control trial of 36 adults looked at gut fermentation of two types of fiber: polydextrose and soluble corn fiber, and found that both fiber types increased fermentation in the gut and were well-tolerated by the subjects.
Increasing fiber intake is often associated with abdominal discomfort caused by bloating, cramping and gas, which can be an obstacle to reaching daily recommendations for fiber. A randomized controlled crossover study of 20 healthy adults examined gut tolerance of soluble corn fiber at daily doses equivalent to and greater than daily recommendations. Current recommended daily intake is 25-38g/day; in this study multiple doses of soluble corn fiber were administered as
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