Here is the [study] (https://www.sciencedirect.com/science/article/pii/S240545772400038X) (N=1.8 million)
Conclusions
This MR study demonstrated no significant causal relationships between red/processed meat intake and the risk of the four CVD outcomes examined. Further investigation is warranted to confirm these findings.
Coverage of this on Epoch Times
Here is an older study (N=29 682) that claimed to have found correlation between redmeat and heart diseases.
We have had generations of humans who have thrived with various combinations of nutrients. Every civilization has their own set of ingredients they specialise in their cooking. My own approach to food is to try and emulate this wholistic approach by picking one or more of your favourite cuisine and try and cover both summer and winter food, and you will be good to go. Only tweak I would suggest is to cut down on sweets and carbs.