[midldei]

> protein does fill you up faster

You are being pretty fast and loose with your language here so I will alight what I think you are trying to say.

"Fill you up" I must assume means that you are implying the state of feeling "full" or satiated.

There is really only one study in the field of broad food source satiety: https://pubmed.ncbi.nlm.nih.gov/7498104/

Potatoes are the most satiating food at 323% that of white bread.

The second is Ling fish which is a source of protein, but another one of my assumptions is that when you say 'protein' I am doubtful you mean 'ling fish'. So assuming you mean a 2026 American definition of 'protein' you're probably referring to cow flesh (beef) which is only 176% of white bread, almost half of potatoes.

So, in the future I would suggest spreading the word and correcting your comment by saying "I mean potatoes do fill you up faster"