What it is
What's left when sugar is refined out of cane — minerals and all, it's still mostly sucrose. The blackstrap halo doesn't change the cargo.
Why your biology objects
Bonded 1:1 sucrose like cane sugar, so no fructose-excess issue, and it does carry real iron and potassium — but it's still concentrated refined sugar. The minerals are a rounding error against the sugar dose.