The US Department of Health and Human Services recommends that calories should be balanced with physical activity for healthy weight maintenance. Furthermore, they recommend increasing intake of fruit, vegetables and whole grains, and reducing intake of foods with high amounts of salt, saturated fats, trans fats, cholesterol, added sugars and refined grains.
Onakpoya, I., Posadzki, P., & Ernst, E. (2014, February 17). The efficacy of glucomannan supplementation in overweight and obesity: A systematic review and meta-analysis of randomized clinical trials. [Abstract]. Journal of the American College of Nutrition, 33(1), 70–78. Retrieved from http://www.tandfonline.com/doi/abs/10.1080/07315724.2014.870013