[KempyKolibri]

Anecdotal, but if you follow carnivore diet groups on Facebook/IG etc you'll frequently see posts from people with TC over 500mg/dl. For example, the carnivorecringe IG account posted someone's labs in December who had a TC of 669 and an LDL of 558.

It's quite possible that it's a combination of diet and genetics, but people can quite easily get to incredibly harmful LDL levels with diet alone.

Edit: here's a case study of someone getting to TC of 488.7mg/dL. I think you'll struggle to get higher quality data than case studies because these kinds of diets are (thankfully) fairly uncommon and no ethics board is going to sign off on an intervention study that's likely to raise blood lipids by this kind of level.

https://academic.oup.com/jes/article/5/Supplement_1/A37/6240...