ch2oh d-Mannitol Xylitol Erythritol

Figure 3. Structures of other food alditols.

Figure 4. Cyclization of d-fructose to pyranose and furanose ring forms.

syrups, d-fructose occurs as the more stable six-membered (hemiacetal/hemiketal, pyranose) ring (Fig. 4); in the di-saccharide sucrose (described in the next section), d-fructose occurs in its five-membered (furanose) ring form (lower ring structure in Fig. 4). (The squiggly lines on carbon 2 in this figure and at the reducing end of Figure 5 indicate a mixture of two configurations—the a and p configurations.) Reduction of d-fructose produces a mixture of d-glucitol (sorbitol) and d-mannitol. Fructose cannot be oxidized to an acid or lactone.

The Sugar Solution

The Sugar Solution

Curb Sugar Cravings Once And For All With These Powerful Techniques. Sugar sensitive people might be low in specific neurochemicals that help us feel calm, centered, confident, and optimistic. Sugar is a drug that temporarily makes the sugar sensitive feel better, but with damaging consequences.

Get My Free Ebook

Post a comment