In a study published in the journal Obesity, researchers from Touro University prove that just by replacing processed sugar, a group of obese children's health improved in 9 days.
Lustig and Jean-Marc Schwarz of the College of Osteopathic Medicine at Touro University California ran their experiment on 43 obese Latino and black children aged 9 to 18 who suffered high blood pressure and unhealthy cholesterol levels. By replacing the processed sugar in their food, but not restricting their calorie intake, they managed to lower blood pressure and lower cholesterol levels in just 9 days, thus lowering the children's risk of heart disease and diabetes.
As reported on NBC News on October 27th, 2015.
Obesity study: http://onlinelibrary.wiley.com/doi/10.1002/oby.21371/full