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synergy · 1
ApoB-carrying lipoprotein particles, which carry "bad" cholesterol, getting into the artery wall is only the start; the inflammation that follows makes plaque grow and become prone to rupture. Besides lowering bad cholesterol, statins are also thought to help stabilize plaque.
regulates · 5
Many ischemic strokes share their upstream cause with heart attacks: ApoB-carrying lipoprotein particles get into the artery wall and build plaque. When a plaque ruptures, it either blocks the vessel on the spot or sends fragments downstream to block smaller branches.
The monacolin K in red yeast rice is lovastatin, the same molecule. It blocks the key enzyme the liver uses to make cholesterol (HMG-CoA reductase), so liver cells put more LDL receptors on their surface and pull LDL cholesterol out of the blood, by about as much as a low-dose statin. Red yeast rice is therefore not a natural alternative to a statin; it is a statin without a dose on the label.
Coconut oil is about 82% saturated fat, and its main fatty acid, lauric acid, clearly raises LDL cholesterol: in pooled clinical trials, LDL cholesterol was about 10 mg/dL higher than with unsaturated vegetable oils. In 2017 the American Heart Association (AHA) advised against using it as a healthy oil.
Mechanism · How saturated fat raises LDL
The surface of a liver cell carries LDL receptors, like a row of cranes along a dock: as blood flows past, they hook LDL particles into the cell and take them apart. How many cranes there are is set in reverse by the cell's cholesterol stock: when the stock is ample, the instruction to make receptors is turned down. Saturated fat reaching the liver props that stock up, the cranes thin out, and particles stay in the blood longer. Lauric acid carries the name of a medium-chain fat yet does exactly this. A statin works the other way round: it leaves the liver cell short of cholesterol, the cranes multiply, and particles are cleared from the blood.
Numbers · How much coconut oil raises LDL
Mensink 2016, a synthesis prepared for the World Health Organization, establishes that lauric acid clearly raises LDL cholesterol. Neelakantan 2020 pooled clinical trials comparing coconut oil with unsaturated vegetable oils: LDL cholesterol was about 10 mg/dL higher and HDL cholesterol about 4 mg/dL higher. The AHA's 2017 advisory says coconut oil is about 82% saturated fat, raises LDL cholesterol and has no known favorable effect to offset that, and advises against its use. A rise in HDL at the same time does not carry away the extra LDL particles.
In practice · What it replaces matters
The effect of a spoonful of oil depends on what it replaces: in place of butter it improves little, and in place of olive oil it swaps out unsaturated fat that was doing you good. So coconut oil belongs among the fats to be replaced, not among health products. It is also not medium-chain triglyceride (MCT) oil: true MCT oil is purified C8 and C10 fatty acids that go straight to the liver through the portal vein, while coconut oil's main fat is C12 lauric acid, which is handled more like a long-chain fat. Using it now and then for flavor or baking is fine; making it your everyday cooking oil is the wrong direction.
ApoB-carrying lipoprotein particles seeping from the blood under the lining of the artery is the first step of a plaque, and high blood pressure injures that lining and makes it easier for them to get in. Controlling blood pressure guards this door, and it and lowering blood lipids are two jobs that both need doing.
Mechanism · How pressure lets particles in
ApoB-carrying lipoprotein particles seeping under the lining of the artery is the first step in forming a plaque. High blood pressure, smoking and high blood glucose all injure that lining and make it easier for particles to get in. Libby 2011 describes atherosclerosis as an inflammatory process in the artery wall, not just an LDL cholesterol number on a lab report. Controlling blood pressure protects this door; how many particles there are is still managed by lowering blood lipids.
Evidence · What these two sources say
Libby 2011 is a review of the biology and Grundy 2019 is a cholesterol management guideline, and neither gives a figure for how much plaque blood pressure control prevents. Do not carry results from blood pressure drug trials straight over to this question. What you can take away is the direction: blood pressure injures the lining so particles get in more easily; lowering the number of particles and protecting the lining are two separate doors, and one cannot replace the other.
Clinical · Two measures, two jobs
Controlling blood pressure does not replace lowering ApoB: even with the door guarded, how many particles are pushing at it is still set by blood lipids. Grundy 2019 is a lipid guideline, and blood pressure is another item in the same assessment of atherosclerotic cardiovascular disease risk. Nor should high blood pressure be diagnosed backward from a lipid test. Each has its own diagnostic criteria and risk levels, and they cannot be merged into one all-purpose checkup sheet.
For people with high triglycerides, guidelines list high-dose EPA as a drug option for lowering triglycerides; fish oil cannot be used as a substitute for a statin to lower LDL.
Mechanism · EPA lowers triglycerides
When triglycerides are high, guidelines list high-dose EPA as a drug option for lowering them. It acts on triglycerides; it does not stand in for a statin to lower LDL or particle numbers. Mach 2020 and Grundy 2019 are both lipid management guidelines; how many milligrams, which preparation, and whether it reduces cardiovascular events are questions for the trials that study fish oil specifically, and those figures are not in these two guideline summaries.
Evidence · Numbers the guidelines do not give
The summaries of these two guidelines do not state how many grams of EPA to take or by what percentage triglycerides fall, so no figures are given here. What you can take away is the direction: high-dose EPA targets triglycerides, and lowering LDL and ApoB still goes through statins.
Myth · Shelf fish oil is not prescription EPA
The fish oil on store shelves is not what the guidelines mean. They describe high-dose EPA used as a drug; mixed omega-3 products, low doses and marketing about lowering LDL get no support from these two guidelines. If your triglycerides are high, you can discuss prescription EPA with your doctor, but do not treat it as a substitute for a statin.
contrast · 1
Hydrogen water is sold as an antioxidant miracle water, but the results measured on blood lipids are unremarkable: Jamialahmadi 2024 pooled 8 randomised controlled trials with 357 patients with metabolic disorders, and changes in LDL and total cholesterol did not reach statistical significance while triglycerides fell only slightly, which the authors themselves called a modest effect. These trials also never measured hard outcomes such as heart attack, stroke or death.