Human ancestors like Australopithecus – which lived around 3.5 million years ago in southern Africa – ate very little to no meat, according to new research published in the scientific journal Science. This conclusion comes from an analysis of nitrogen isotope isotopes in the fossilized tooth enamel of seven Australopithecus individuals. The data revealed that these early hominins primarily relied on plant-based diets, with little to no evidence of meat consumption.

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[–] AntiThesis@leminal.space 1 points 5 hours ago* (last edited 4 hours ago)

The study Meta-Analysis of Randomized Controlled Trials of Red Meat Consumption in Comparison With Various Comparison Diets on Cardiovascular Risk Factors analyzed 6 RCT's that compared red meat to plant-based protein sources and finds that the plant-based protein sources consistently result in better blood lipids and lipoproteins compared with red meat:

Wiebe SL, 1984 - https://doi.org/10.1093/ajcn/40.5.982
Sinclair AJ, 1987 - https://doi.org/10.1007/BF02540369
Prescott DA, 1988 - https://doi.org/10.1042/cs0740665
Wolmarans P, 1991 - https://doi.org/10.1093/ajcn/53.5.1171
Haub MD, 2005 - https://doi.org/10.1016/j.metabol.2005.01.019
Hosseinpour-Niazi S, 2014 - https://doi.org/10.1038/ejcn.2014.228

As to your comments about CVD markers, there are of course contrarians, but the evidence linking both LDL-C and apoB with CVD risk is strong. Look at mendelian randomization studies for both.

https://link.springer.com/article/10.1186/s12916-020-01792-7

https://www.neurology.org/doi/full/10.1212/WNL.0000000000007091

https://journals.plos.org/plosmedicine/article?id=10.1371%2Fjournal.pmed.1003062

https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2814089

Substitution of animal with plant protein lowers apo-B https://www.ahajournals.org/doi/full/10.1161/JAHA.117.006659

In comparison with control diets, plant-based diets improved Homeostatic Model Assessment for Insulin Resistance https://www.mdpi.com/2072-6643/16/13/2110

All cause mortality was reduced by plant-based diet in the meta-analyses of prospective cohort studies I shared earlier, nobody tries to measure that for dietary RCT’s…

Low carb diets high in animal products result in increased CAC scores and the animal-based but not plant-based LCD score is significantly associated with a higher risk of CAC progression (animal-based LCD score: hazard ratio, 1.456 [95% CI, 1.015–2.089]; P=0.041; plant-based LCD score: hazard ratio, 1.016 [95% CI, 0.821–1.257]; P=0.884 https://www.ahajournals.org/doi/full/10.1161/ATVBAHA.120.314838 (observational)