So eating an apple or drinking some juice during the day kills a fat-loss diet? I'm sorry but I just don't buy that. Its an extreme view and not supported by scientific data, unless I'm missing something.
There have been a multitude of studies done, however, that prove fruit juice intake doesn't contribute to obesity, and in fact is good for diets because its a better source to get some of your carbs during the day for those with a "sweet tooth". There have been a mulititude of studies done on this subject. Here's a quote from an article dealing with childhood obesity and fruit juices;
The article, authored by Carol E. O'Neil, PhD, MPH, LDN, RD, Louisiana State University, and Theresa A. Nicklas, DrPH, USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, examined 21 studies about a relationship between consumption of 100% fruit juice by children and adolescents and weight, and found "there is no systematic association between consumption of 100% fruit juice and overweight in children or adolescents."
"Health professionals and policy makers should be encouraged to objectively review the literature on all beverages and encourage consumption of healthful beverages including water, milk, and 100% fruit juice," according to the authors. "The data support the consumption of 100% fruit juice in moderate amounts, and this may be an important strategy to help children meet the current recommendations for fruit."
"The rising epidemic of overweight and obese children should be a cause for great concern amongst healthcare professionals and the public at large," said James M. Rippe, M.D., cardiologist and Editor in Chief of AJLM. "The findings that the consumption of 100% juice by children and adolescents is not associated with overweight is very important since 100% fruit juices are nutrient dense and their consumption represents an excellent way to help children meet the dietary guidelines for Americans. The article by O'Neil and Nicklas clears up misconceptions that many healthcare professionals and parents may have about this issue."
Full article can be found here;
http://www.medicalnewstoday.com/articles/108575.php
I used to drink fruit juice before a workout because I wanted an insuline spike (which is very "anabolic") during weight lifting. I found out this is nowhere near as effective as drinking something containing pure sucrose (sugar) or HFCS (High Fructose Corn Syrup).
BTW - Contrary to the big fearful myth that HFCS is really bad for you and different than regular sugar, studies show this ALSO is not the case.