Because as long as you hit your daily protein requirements, it doesn't really matter all that much. Shakes just give an easy way to ingest more whey than you may otherwise. Very strict protein timing was debunked by the very researchers you're throwing shade on.
But sure, by all means if you think the shakes are absorbed by the body the same way as solid food go for it.
Based on the biology and mechanisms, that is what I think. The only real difference is speed of metabolism, but that only matters if you're not eating with any regularity throughout the day. Once you hit a certain level of protein quality, you don't really get any additional out of it... every animal-based protein source I can think of checks that box.
@jamesgray Are you trying to lose weight ? If yes know that’s it’s not a good thing if you want to gain muscle. It’s extremely far from optimal and it will only work while you’re still a beginner. If you’re trying to gain muscle (so gain weight) then intermittent fasting may just not be your best idea
@jamesgray Track your calories, if you feel very full doing IF with higher protein it would be helpful to know where your calories are at so you can know if you are in a surplus, at maintenance, or in a deficit. Assuming you are trying to maintain a deficit (assuming why you are doing IF) to lose weight, having higher protein will be important to ensure your body isn't losing muscle mass.
Perhaps you can look at changing your eating style? Get some protein supplementation in that is not filling, like whey, so that you can drink more of your protein and not feel overly full.
