You are starting with a false pretext. Disaccharides don't break down into monosaccharides (ie, glucose and fructose) in solution. They are split by chemical means (ie, enzymes).
I can get back crystalline sucrose from sucrose that has been dissolved in water to break down into glucose and fructose.
No you can't. You can seperate mixtures like sugar water though physical means, but you can't seperate compounds by physical means. If you mix sucrose and water, you've created a mixture. They can be seperated by physical means (evaporation). If you combine HFCS with water, you've created another mixture. It can be seperated by physical means. Mixtures can be separated by physical methods. Compounds cannot.
Now, if HFCS behaves the same way as sugar does in solution, it too breaks down to glucose and fructose in solution.
Your assumption that sucrose breaks down in an aqueous solution is incorrect. Enzymes are required to break the glycosidic bonds of sucrose. Disaccharides are digested by enzymes in the small intestines. This is why you can mix sugar with water, and use physical means to seperate the two. You're simply creating a homogeneous solution, not a compound. Mixing sugar with water doesn't break the glycosidic bonds connecting the two monosacchrides glucose and fructose.
then doesn't it imply that sugar and HFCS really don't behave the same way inside our bodies?
The body converts fructose to glucose and uses it for fuel or stores it as fat. It does it with both fructose from sucrose and fructose from HFCS.
assume you're using 50:50 HFCS.
There is no such thing. 50:50 is sucrose, not HFCS.
Exactly what I wanted.
Thanks, so, if sugar needs chemical processing to release the glucose and fructose (enzymatic action) in solution while HFCS doesn’t, and if the body has the ability to produce the enzyme (sucrase) to break down sucrose to glucose and fructose, doesn’t using HFCS bypass a regulatory mechanism in the body (regulated by sucrase production)?