I do not think that carbohydrates all together are the problem. Its just that our capabilities in understanding (poly-) saccharides are 20 to 30 years delayed c

I do not think that carbohydrates all together are the problem. Its just that our capabilities in understanding (poly-) saccharides are 20 to 30 years delayed compared to other important biomolecules like nucleobases or aminoacids while playing a very important role (like the polysaccharide modifications of proteins). The problem is not that we cannot detect whether there is any sugar molecule present, its just hard to say which one (of the thousands of possible combinations of e.g C6H12O6). We do not know how much is decoded in there.