It's a prediction. Not a terribly unreasonable one as far as I can see. If a drug can move 5% of the ~trillion dollars spent on groceries in the US, there's a lot of money available for clawing those 5% back.
Demanding evidence for predictions like this is a bit... hm. Arrogant, maybe. A prediction is a commitment. We want people to make predictions. The evidence we get when those predictions come true or not. Would you be willing to make the opposite prediction?
Why wouldn't they have already been looking for a way to make their food more palatable? There was already a lot of money on the line
The figure isn’t 5% of all grocery spending, it’s a 5% household change after one member starts GLP-1.
I predict you’ll retract this comment.
I don’t have any evidence that you will, but since you seem to think that’s ok, here goes!
They'll be hard pressed to find something that isn't running into medical regulation territory.
Wanting evidence for random claims is arrogant? I'd say magical thinking is whats arrogant.
There are sometimes truly bizarre demands for evidence. I once posted a pure opinion piece -- essentially a moral judgment on what is good and what is bad (in the domain of technical writing) -- and got hit with "source?"
Me.
I am the source.