This kind of study can never show causation.
Nothing new here,
It's just another MOOSE study looking again at the same old studies over and over.
It does a better job than most in controlling bias to the best extent possible but still, garbage in garbage out.
Couple highlights from it,
The majority of studies used in this meta-analysis included red meat, poultry and fish as components of a "plant based diet" e.g. Mediterranean and DASH diet
No association was found for poultry or fish.
No association was found eating red meat up to 3 times per week.
The discussion section of this paper is tediously bothersome, as they make numerous suppositions and statements that are not supported or even implied by the included data. Almost like it was written by ChatGPT.