Animal protein and endothelial damage

A family member of mine recently entirely gave up meat and animal products after getting tested and found to have 50% blockage in artery (IIRC).

When I questioned her about the wisdom of this, she told me it’s not the saturated fat alone she is avoiding, it’s that research has shown that the amino acids in animal proteins damage endothelial cells.

When she told me this I was a bit taken aback because I hadn’t heard that specifically before. Google led me to this A Plant-Based Diet, Atherogenesis, and Coronary Artery Disease Prevention

quote:

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A plant-based diet is increasingly becoming recognized as a healthier alternative to a diet laden with meat. Atherosclerosis associated with high dietary intake of meat, fat, and carbohydrates remains the leading cause of mortality in the US. This condition results from progressive damage to the endothelial cells lining the vascular system

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What say y’all? I’m skeptical of any anti-meat information but I want to keep an open mind.

Seems odd that we would evolve to need amino acids that are deadly.