C6H8O6 is C6H8O6 whether it comes from corn, sorbitol, sorbose, goat liver or bee's wings.
I've seen these same specious arguments that are posed in this thread for over 35 years.
Some people actually believe this drivel, but most of them are just doing the marketing for the nonsensical RDA so called food grown mega fraud vitamin companies.
I suspect they are agent provacateurs of BigPharma.
Pauling disproved "the ascorbic acid interferes with B12 myth" of Victor Herbert decades ago.
Some people still believe in the tooth fairy.
"Unless we put medical freedom into the constitution...medicine will organize into an undercover dictatorship..force people who wish doctors and treatment of their own choice to submit to only what..dictating outfit offers." Dr. Benjamin Rush