Do 100% natural fruit juices contain free glucose?
I believe when they say 100% natural, they mean no sugar added. This means there is no sucrose. But what about glucose? Do fruit juices have free glucose, or are they really 100% natural and only contain fructose?
The idea that a juice is one hundred percent natural means that no added processed sugars like sucrose will be in the product. However, fruit naturally contains the sugar fructose, a simple monosaccharide. It is directly absorbed into the small intestinal lining and enters the bloodstream during digestion and has no need to be chemically broken down. Glucose is also a monosaccharide that absorbs directly into the bloodstream, but won't be present in 100% natural fruit juice. The only time glucose would be involved would be if a juice is artificially sweetened with sucrose. When sucrose is broken down via digestion, glucose would then be present.
No, fruit juices that are 100% natural should only contain natural sugars. That are sugars in the fruit itself, namely fructose. Try avoiding juices with glucose and sucrose in the ingredients list.