Low-density lipoproteins (LDL)
LDL carries cholesterol to tissues; risk assessment needs LDL-C, ApoB, non-HDL and the full metabolic context.
Low-density lipoproteins, or LDL, carry cholesterol and other lipids to tissues. The issue is not that cholesterol is “bad”, but that excess atherogenic particles increase atherosclerosis risk.
LDL-C shows how much cholesterol is inside particles, but it does not always reflect particle number. In unclear cases, ApoB and non-HDL cholesterol are useful.
On Keto
In some people, LDL-C rises substantially on keto, especially with high saturated fat intake, rapid weight loss or very low carbohydrates. This should not automatically be dismissed as “normal keto”.
The practical conclusion: LDL should be evaluated with ApoB, triglycerides, HDL, blood pressure, glucose, family history and diet composition.
How To Evaluate It In Tests
LDL should not be read in isolation, but as part of the lipid profile and overall risk. Triglycerides, HDL, LDL, non-HDL, ApoB, blood pressure, glucose, smoking, age, family history and existing cardiovascular disease matter.
On keto, lipids may change substantially: triglycerides may fall and HDL rise, while LDL-C or ApoB may rise strongly in some people. Testing is best repeated after weight is stable, not during the first weeks of rapid weight loss.
If markers worsen, that does not automatically mean abandoning low-carb eating. Fat sources, saturated fat amount, calories, fiber, fish, nuts and total risk are usually reviewed first.
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