I've had a look at how my cholesterol levels have changed since I went low carb in 2013. The results I have are from 2011 and 2020.
Total cholesterol has increased from 3.1 to 4.2 (normal range is 2-5 mmol/l)
HDL (the "good" one) has improved from 1.29 to 1.5 (normal range is 1.1-2.6 mmol/l)
LDL (the "bad" one) has increased from 1.6 to 2.5 (normal range is 1-3 mmol/l)
Triglycerides has stayed the same from 0.43 to 0.4 (normal range 0.5-2 mmol/l so has always been low)
Cholesterol/HDL ratio (this is the most informative standard measure) has improved from 2.4 to 2.8 (normal range is 2-5)
Triglyceride/HDL ratio (best single measure predictor of heart disease risk) has improved from 0.33 to 0.27 (ideally should be below 0.87)
So with my n=1, nine years of eating a high proportion of fat emphasising saturated fat and cholesterol-containing foods, my cholesterol levels are all still normal. The LDL and therefore the total cholesterol have increased slightly which often happens on low carb. However the HDL and the ratios have also improved which means the overall lipid profile is better than it was before. Certainly no doctor would look at my results and rush to get me on statins!
Hopefully this will be reassuring to anyone that's still worried all this saturated fat will clog up their arteries! If you have any concerns then ask your GP for a cholesterol test and make sure you get all the results not just the total cholesterol. Total cholesterol includes the "good" HDL as well as the "bad" LDL so it can be high because you have a good level of the protective HDL lipoproteins. It's important to look at all the levels individually as well as the ratios. If your cholesterol levels are already elevated then consider getting them tested again in 3-6 months so you can what effect your dietary change has had.