I am not a weightlifter, I am an amateur powerlifter, and I do pretty intense resistance training for my age (54yo) and my weight (112kg) and I eat about 800g to 1kg a day of meat - duck, pork or beef. Even if I eat 1kg Wagyu beef, it would give me about 3000 calories, slightly less than 3500 calories I need to keep my muscle mass. I would happily eat even more meat but circumstances prevents me to do so.
I used to drink protein shakes, but now I am actively against these. Artificial sweeteners provoke insulin release [1] [2] that leads to type-II diabetes.
[1] https://pubmed.ncbi.nlm.nih.gov/2887503/
[2] https://www.sciencedirect.com/science/article/abs/pii/S10568...
You can get protein powder without flavoring. I drink that either pure or with a little bit of flavored protein mixed in (something like 3:1) because the flavored stuff is so sweet I can't drink it. Some brands I could literally do 3 parts flavorless, 1 part flavored and it would still taste too sweet.
Your best evidence is a rat study and a narrative review?
Kinda makes zero cal sweeteners look good.
you can get protein powder that doesn't contain artificial sweeteners. You can get protein powder that doesn't contain any sweetener. You can even buy pure protein powder without any additives at all.