The big alarm for me was the Xanthelasma under my eyelid which happened when I was eating low carb, higher fat.
If by low carb you mean this:
I was on a moderate protein, moderate fat, moderate carb diet (2400 calories, 33% P, 33% F, 33% C) and I was lean, but my LDL cholesterol was 238 (6.2).
That is 198g carbs per day. That is in no way, shape or form a low carb diet.
Low carb is less than 100g carbs per day.
Very low carb (keto) is less than 20g carbs per day. Carnivore is zero carbs per day.
In addition, eating a diet that is both high/moderate carb and high/moderate fat is a recipe for disaster, unless you are a baby or a young, healthy, fit athlete. Otherwise, eating like that promotes very fast weight gain and all kinds of metabolic abnormalities.
Most people must choose either low carb or low fat and stick with that long term, if they want to be healthy and avoid all kinds of metabolic diseases.
"The Randle cycle, also known as the glucose fatty-acid cycle, is a metabolic process involving the competition of glucose and fatty acids for substrates. It is theorized to play a role in explaining type 2 diabetes and insulin resistance."https://en.wikipedia.org/wiki/Randle_cycle