A 2014 study found that whey protein was more
satiating than casein and also more satiating than a carbohydrate supplement (9).
Not exact matches
Studies show that collagen protein is 40 % more
satiating than whey, soy, or
casein protein.
There doesn't seem to be much of a consensus on why whey and
casein might / might not be more
satiating than the other.
Not to mention, studies have shown collagen has a
satiating effect, even more so
than whey or
casein!