The Central Metabolic Pathway in a human converts a wide variety of different sugars into glucose.
You cannot get around that fact. Two steps later, all that glucose is converted (isomerized) into fructose.
You cannot escape that fact either.
What you get is a smaller variety of simpler molecules which can be processed in bulk with fewer weird steps.
You also assume that all that sugar is oxidized for empty calories. Wrong. All along the line, I'll take
bucketfuls of intermediates as building blocks and build amino acids for proteins.
I'd take more to build oils and lipids and fats and hormones.
Then, depending on energy demand, I will totally trash some to H2O and CO2 for the energy.
Or, I will join bunches of 2C bits and build belly fat for a rainy day.
It never rains enough. Agreed?
Thanks for this, vividly took me back 20 years or so to Biochemistry lectures at Nottingham.
Just had a lovely few minutes remembering some really good times!