Cholesterol on a low-carb diet: what rises, what falls, and what to do about LDL
Three months on the method, lipid profile: triglycerides from 1,9 to 0,9, HDL from 1,1 to 1,5, blood pressure down by 12. And LDL from 3,1 to 4,2. The doctor frowns, you panic. Between “everything is great” and “quit the method” there is an honest answer, and it requires two more numbers and a conversation. Section — cholesterol and heart.
What happens to the markers
| Marker | Change | In whom | Why |
|---|---|---|---|
| Triglycerides | -30-50% | almost everyone | the liver does not make fat from sugar |
| HDL | +10-20% | almost everyone | dietary fats, especially saturated fat and omega-3 |
| TG/HDL | improves | almost everyone | the main risk marker |
| LDL | unchanged or slightly lower | 70-80% | lower insulin, larger particles |
| LDL | noticeable increase | 20-30%, more often lean and active people | the liver transports more fat as fuel |
| Total | may increase | often | due to HDL and LDL |
Why LDL rises in lean people
A hypothesis that explains the observations: in a person with little body-fat reserve and low insulin, the liver sends more fat to the tissues as fuel, and LDL — its “truck” — rises. These people usually have low triglycerides, high HDL, and large LDL particles. Whether this LDL is as dangerous as it is with high triglycerides and insulin resistance is still being studied; some cardiologists consider the risk lower, while others say that LDL is LDL. The honest answer: we do not yet have data spanning decades. The ratio that matters more is triglycerides and HDL.
20-30%
people — LDL increase
ApoB
particle count — a more accurate measure than LDL
-10-20%
LDL when replacing saturated fat with olive oil and fish
with a doctor
decision based on the full picture
What to do if LDL has increased
Check triglycerides and HDL
If TG is below 1,0 and HDL is above 1,5 — the particles are large, and the picture is different from LDL with TG at 2,5.
Get an ApoB test
The number of atherogenic particles. Below 0,9 g/l with high LDL — there are few particles, and they are large.
Consider the rest
Family history, blood pressure, blood sugar, inflammation (CRP), smoking, waist circumference. Risk is the sum, not one number.
Try shifting the types of fat
Less butter and cream, more olive oil, avocado, fish, and nuts. The plate stays the same — low-carb. LDL usually falls by 10-20% over 2-3 months.
Decide with your doctor
Based on the full picture. With familial hypercholesterolemia or high overall risk, statins are compatible with the method.
What not to do
- Quit the method because of one number — triglycerides and blood pressure will rise again
- Ignore LDL with a family history of heart attacks
- Eat “fat bombs” and spoonfuls of butter
- Get a lipid profile in the first 6 weeks — during the adjustment period
- Argue with your doctor instead of bringing ApoB and TG/HDL results
Frequently asked questions
Total cholesterol 6,5 — is that bad?
Without the breakdown, it means nothing. 6,5 with HDL 2,0 and TG 0,8 is one story; with HDL 1,0 and TG 2,5, it is another. Look at the breakdown.
Eggs and butter — should I eliminate them?
Eggs — no, dietary cholesterol has almost no effect. Butter and cream — if LDL rises, shift toward olive oil and fish without removing fats.
How can I read the report myself?
A separate article — how to read a lipid profile — with reference ranges and the reading order.
- Triglycerides and HDL: one ratio instead of total cholesterolDivide triglycerides by HDL. Less than 1 — excellent, more than 3 — poor, regardless of total cholesterol. Why this ratio shows particle size and actual risk, and what drives it.
- How to read a lipid panel: a five-step process without panicTotal cholesterol is the last thing to look at. Order: triglycerides, HDL, ratio, LDL in context, ApoB when in doubt. Ranges, pitfalls, and what to bring to the doctor.
- Blood Pressure on a Low-Carb Diet: Why It Drops and What to Do About Your PillsInsulin retains sodium and water — blood pressure rises. Insulin drops — water leaves, and blood pressure decreases by 5-15 over several weeks. What this means for people taking medication, and why salt is not the enemy.
- Metabolic syndrome checklist: five numbers in one visitWaist, triglycerides, HDL, blood pressure, glucose. Three out of five — syndrome, and weight has nothing to do with it. How to check yourself, what each item means, and why after six months of the method they are usually zero.
- Energy crashes after eating: why you feel sleepy after lunchLunch — and an hour later you can't work. It's not that you "overate"; it's a roller coaster: blood sugar rises, insulin overshoots, and blood sugar drops below normal. Reactive hypoglycemia, the afternoon slump, and how to eat so you have energy after a meal.
- Metabolic flexibility: why some can go 16 hours without eating while others «crash» after threeA healthy body switches from carbohydrates to fat overnight. A body fueled by sugar six times a day has forgotten how: without food for three hours — shaking and brain fog. It’s not character, but a rusty switch, and it can be fixed in a month.
- Blood Sugar
- Cholesterol and Heart
- Metabolic Flexibility
Reviewed by Anastasia Zhukova, Fitness Trainer • Author of a Nutrition and Training System • Creator of an AI Personal Support Platform
A human has reviewed this material against the method and real client practice.