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Red Yeast Rice · Monascus purpureus
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In one pass Red yeast rice is rice fermented by a red mold. Not this — Red yeast rice = natural, safer statin — The active compound in red yeast rice, monacolin K, is chemically the same molecule as the statin drug lovastatin. Natural does not mean safe: it brings variable doses and contamination with the toxin citrinin.
Educational content, not medical advice — consult a clinician.
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Chapter 1
What it actually is
Red yeast rice is rice fermented by a red mold. What matters is that it contains a natural compound called monacolin K, which is the same molecule as the prescription cholesterol drug lovastatin. So the natural statin on the supplement shelf is really a statin with no dose on the label.
How it is made: ordinary rice is inoculated with a red filamentous fungus (Monascus purpureus) and cultured for 2–3 weeks, until the grains are stained deep red and covered in red threads of fungus. That is red yeast rice, also known in Chinese cooking as red koji or red fermented rice. Its original role is as a food coloring: the red layer on Chinese red sausage and red fermented tofu mostly comes from it, and traditional Chinese medicine also uses it in prescriptions.
It has been pushed as a heart supplement in recent years because of a chemical coincidence: the monacolin K that Monascus makes naturally happens to be the same molecule as the first prescription statin ever marketed. So it reached the supplement shelf labeled a natural statin, and skipped the prescription step too.
The thing to remember: the molecule is the same as a statin, and so are the risks. If you develop unexplained muscle pain or weakness while taking it, tell a doctor promptly; if your urine also turns tea- or cola-colored, that is a sign of rhabdomyolysis (muscle cells breaking down in large numbers), so stop taking it and go to the emergency department now.
How it is made: ordinary rice is inoculated with a red filamentous fungus (Monascus purpureus) and cultured for 2–3 weeks, until the grains are stained deep red and covered in red threads of fungus. That is red yeast rice, also known in Chinese cooking as red koji or red fermented rice. Its original role is as a food coloring: the red layer on Chinese red sausage and red fermented tofu mostly comes from it, and traditional Chinese medicine also uses it in prescriptions.
It has been pushed as a heart supplement in recent years because of a chemical coincidence: the monacolin K that Monascus makes naturally happens to be the same molecule as the first prescription statin ever marketed. So it reached the supplement shelf labeled a natural statin, and skipped the prescription step too.
The thing to remember: the molecule is the same as a statin, and so are the risks. If you develop unexplained muscle pain or weakness while taking it, tell a doctor promptly; if your urine also turns tea- or cola-colored, that is a sign of rhabdomyolysis (muscle cells breaking down in large numbers), so stop taking it and go to the emergency department now.
Numbers · How much drug is in a capsule
Put plainly, red yeast rice is fermented rice that contains a natural statin. The lead player is monacolin K (that is, lovastatin), alongside about 14 related compounds such as monacolins J, L, M and X, plus some red pigments and other by-products.Two things really need watching:
First, citrinin: a mycotoxin that some Monascus strains make as a by-product, and it harms the kidneys.Second, the dose: Cohen 2017 tested 28 red yeast rice products from mainstream US retailers. Taken at each manufacturer's own recommended daily serving, the monacolin K swallowed per day ranged from 0.09 mg to 10.94 mg, while the starting dose of prescription lovastatin is 10–20 mg a day.
That means: under the same natural label, you might be taking almost no drug, or half a prescription tablet, or even a whole one, depending on which product you bought. It is not an ordinary supplement; it is a prescription drug with no dose on the label. That is where understanding the whole red yeast rice story begins.
Chapter 2
How it lowers cholesterol
What monacolin K does inside you is exactly what a prescription statin does.
Not all cholesterol comes from food; liver cells make it too. On that production line sits a bottleneck enzyme, HMG-CoA reductase, which pushes raw material toward cholesterol. Monacolin K (that is, lovastatin) blocks exactly that enzyme. Once the liver cells make cholesterol more slowly, they put more low-density lipoprotein receptors (LDL receptors) on their surface, like opening extra collection points, and pull bad cholesterol out of the blood into the liver. The level of low-density lipoprotein cholesterol () in the blood falls.
So how far it lowers cholesterol, and which side effects it can cause, are the same as for a low-dose prescription statin; the only difference is that you do not know how much you took.
Not all cholesterol comes from food; liver cells make it too. On that production line sits a bottleneck enzyme, HMG-CoA reductase, which pushes raw material toward cholesterol. Monacolin K (that is, lovastatin) blocks exactly that enzyme. Once the liver cells make cholesterol more slowly, they put more low-density lipoprotein receptors (LDL receptors) on their surface, like opening extra collection points, and pull bad cholesterol out of the blood into the liver. The level of low-density lipoprotein cholesterol () in the blood falls.
So how far it lowers cholesterol, and which side effects it can cause, are the same as for a low-dose prescription statin; the only difference is that you do not know how much you took.
Numbers · How far it lowers LDL next to a statin
At typical doses (3–10 mg of monacolin K a day), low-density lipoprotein cholesterol () falls by about 20–30%, total cholesterol by 15–20% and by 10–15%, while high-density lipoprotein () rises slightly (5–7%). These numbers essentially match a low-dose prescription statin: lovastatin 10 mg ≈ monacolin K 10 mg ≈ LDL down 20–25%. No miracle, and not especially weak either. The difference is that a prescription statin's dose is standardized and can be stepped up all the way to 80 mg, whereas you cannot control the dose of red yeast rice.Marketing leans on two claims, and neither holds up when you take it apart:
Red yeast rice has 14 monacolins that work together and beat a pure statin: the others (J, L, M, X) only weakly inhibit the enzyme in the test tube, and their blood levels are too low to do much; monacolin K alone accounts for the great majority of the drug effect. The difference that full spectrum makes is small enough to ignore.Red yeast rice is slow-release and has fewer side effects: it is the same molecule as lovastatin, absorbed and broken down in the body almost identically, with the same side effects, including muscle aches, rhabdomyolysis and raised liver enzymes. What makes side effects look rarer is that many products contain little statin to begin with, not that being natural makes it gentler.
As for why some people would rather take red yeast rice than get a statin prescription, it mostly has nothing to do with the drug. Red yeast rice is classed as a dietary supplement and needs no prescription; there is the illusion that natural means safe; and some people simply do not want to see a doctor. In fact, generic lovastatin in the US has long cost only a few dollars a month (about $5–10 a month).
If all you want is a 25% drop in LDL-C, a prescription statin and red yeast rice are the same thing in mechanism and in numbers. What differs is quality control, dose accuracy and medical follow-up, and all three count against red yeast rice.
Chapter 3
Trial evidence on cholesterol
Red yeast rice has (RCTs) behind its cholesterol lowering, but the conclusion comes in two layers. In products whose content is known, it does lower low-density lipoprotein cholesterol (). Whether it means fewer heart attacks and fewer deaths has been answered by only one large trial in China, which used a prescription-grade standardized preparation, and that answer does not carry over to capsules off the shelf.
First, the cholesterol layer. Becker 2009 (*Annals of Internal Medicine*) was a randomized trial in the US of 62 adults with high cholesterol who had stopped statins because of muscle aches. One group took red yeast rice (1800 mg twice a day, roughly 6–7 mg of monacolin K a day) and the other took placebo; both groups also made lifestyle changes, and they were followed for 24 weeks. In the red yeast rice group, LDL-C was 1.11 mmol/L (43 mg/dL) lower than at baseline by week 12, and at week 24 it was still lower than on placebo, a statistically significant difference. The share with muscle aches (5% on red yeast rice vs 9% on placebo) was not higher. The authors concluded that red yeast rice may be an option for people who cannot take statins. Keep its limits in mind too: it was a small, single-site, short trial that looked only at lab measures, and it assumed a product with known content.
First, the cholesterol layer. Becker 2009 (*Annals of Internal Medicine*) was a randomized trial in the US of 62 adults with high cholesterol who had stopped statins because of muscle aches. One group took red yeast rice (1800 mg twice a day, roughly 6–7 mg of monacolin K a day) and the other took placebo; both groups also made lifestyle changes, and they were followed for 24 weeks. In the red yeast rice group, LDL-C was 1.11 mmol/L (43 mg/dL) lower than at baseline by week 12, and at week 24 it was still lower than on placebo, a statistically significant difference. The share with muscle aches (5% on red yeast rice vs 9% on placebo) was not higher. The authors concluded that red yeast rice may be an option for people who cannot take statins. Keep its limits in mind too: it was a small, single-site, short trial that looked only at lab measures, and it assumed a product with known content.
Evidence · The big trial, pooled data and guidelines
Larger still is China's CCSPS trial (Lu 2008, *American Journal of Cardiology*). It randomized 4870 people who had had a heart attack (with that was not high on average at baseline) to placebo or to Xuezhikang, a partly purified, standardized red yeast rice extract providing about 5 mg of monacolin K a day, and followed them for an average of 4.5 years. The main endpoint (non-fatal heart attack plus death from coronary heart disease) fell from 10.4% on placebo to 5.7%, a 45% relative drop, and deaths from any cause fell 33%. This is one of the rare red yeast rice trials with : genuinely fewer deaths and events, not just nicer lab numbers.But there is a caveat you cannot get around. In China, Xuezhikang is a prescription-grade standardized preparation, not the same thing as the red yeast rice supplements on Western shelves. Carrying its results over to a capsule you picked up online does not hold.
Beyond that, the evidence scatters. Pooled analyses consistently find a lipid-lowering signal: Gerards 2015 pooled 20 randomized trials with a stated monacolin K content, and LDL fell about 1.0 mmol/L more than on placebo, no different from statin groups; but most trials assessed safety poorly; but monacolin K content varies wildly between products, and quality is uneven. Claims that red yeast rice lowers blood pressure or blood sugar or improves fatty liver are either backed by very weak evidence or tangled up with the cholesterol-lowering effect, and none of them is recommended.
What do the authorities say? The US AHA/ACC 2018 cholesterol guideline does not list red yeast rice among its recommended cholesterol treatments, and its dose cannot be standardized in the first place. The European Food Safety Authority (EFSA) carried out a safety assessment in 2018, after which the EU ruled that red yeast rice products providing 3 mg or more of monacolin K a day can no longer be sold to the general public as dietary supplements. In China's 2016 lipid guideline, Xuezhikang is listed as a prescription option.
So does red yeast rice work for you?
The product clearly states monacolin K ≥ 5 mg a day and has third-party certification: it probably works, lowering LDL by 20–25%.A bottle bought online on a whim: the content drifts anywhere between 0.09 and 10.94 mg, so it might do nothing at all or equal a full prescription dose, and you have no idea how much you are taking.Already on a prescription statin: do not add red yeast rice on top; that is heading straight for rhabdomyolysis.High risk, needing LDL cut by 50% or more: red yeast rice is simply not a big enough dose; go straight to a high-intensity prescription statin.
In the end, the impressive red yeast rice trials all used standardized preparations, and what you buy online is not the same thing.
gerards-2015-red-yeast-rice-meta
Chapter 4
Unknown dose, toxins, interactions
The real trouble with red yeast rice is not whether it works. It is that you do not know how much drug you swallowed. There are three layers of risk, in the order you would run into them: under the same kind of label, content can differ by two orders of magnitude; some products carry citrinin, a mycotoxin that harms the kidneys; and the side effects and drug interactions are the same list as for prescription lovastatin, so the EU has already pushed products above a certain dose out of the supplement category.
The word natural does not cover any of these three. The content cannot be controlled because monacolin K is grown on the rice by a mold, not weighed out in milligrams.
The word natural does not cover any of these three. The content cannot be controlled because monacolin K is grown on the rice by a mold, not weighed out in milligrams.
Safety · Dose, toxin and drug interactions
Risk 1 · You do not know how much you tookCohen 2017 (*EJPC*) bought 28 red yeast rice products from mainstream US retailers and tested them. In 2, monacolin K could not be detected at all. For the rest, taken at each manufacturer's own recommended daily serving, the daily amount ranged from 0.09 mg to 10.94 mg, a spread of about 120-fold. So the same red yeast rice label covers three very different situations:
Content close to 0: you think you are lowering your cholesterol, but you are taking no drug at all.Close to lovastatin 10 mg a day: already a clinically effective dose, but you do not know it.The top of the range, roughly one whole tablet at the prescription starting dose: it works, and the risk of side effects comes with it.
A prescription statin can be stepped up one level at a time because every tablet's content is known. On the red yeast rice route you get no feedback from blood levels, and no doctor checks your liver enzymes () or (CK, an enzyme that rises in the blood when muscle is damaged). It amounts to taking a prescription drug at a blind dose.
Risk 2 · It may also contain a mycotoxin
Some Monascus strains make citrinin alongside monacolin K. Citrinin is a mycotoxin that harms the kidneys and is suspected of causing cancer. Not every strain makes it, but plenty of commercial strains do: of the 12 products tested in Gordon 2010 (*Arch Intern Med*), 4 (one-third) had raised citrinin levels. Note that this is a different study with different samples: the 120-fold dose spread above comes from Cohen 2017, and Cohen's 28 products were tested only for monacolin K, not for mycotoxins. EFSA's 2012 level of no concern for citrinin's kidney toxicity is 0.2 μg/kg of body weight a day, and long-term use of a poor-quality product could cross that line. The trouble is that kidney damage is silent: there are no symptoms early on, and by the time creatinine on a lab sheet looks wrong, it is no longer early.
Risk 3 · Its contraindications match a prescription statin word for word
This layer is the easiest for the word natural to hide, and it is the only one regulators have actually acted on. In 2018 the European Food Safety Authority (EFSA) carried out a dedicated safety assessment of monacolin K. It reached three conclusions: there is no evidence that it is safe at dietary-supplement doses; case reports already exist of liver injury, muscle pain and rhabdomyolysis caused by monacolin K from red yeast rice; and its side-effect profile overlaps with prescription lovastatin. After that assessment the EU set a rule: red yeast rice products providing 3 mg or more of monacolin K a day can no longer be sold to ordinary consumers as dietary supplements. The claim that natural means safe no longer stands at the regulatory level.
The things that push its blood level up are the same list as for a prescription statin:
Inhibitors of (the main liver enzyme that breaks down drugs of this kind), including grapefruit juice, clarithromycin, azole antifungals and protease inhibitors: monacolin K cannot be cleared and builds up in the blood, directly raising the risk of rhabdomyolysis.Fibrates (gemfibrozil): the risk of muscle disease adds up.Cyclosporine: combined with statins, it carries a high risk of rhabdomyolysis.Warfarin: there are case reports of a raised (a measure of how fast blood clots).Alcohol: it adds to the strain on the liver.
If you develop unexplained muscle pain, tenderness or weakness while taking red yeast rice, tell a doctor promptly; if your urine also turns tea- or cola-colored, that is a sign of rhabdomyolysis, so stop taking it and go to the emergency department now.
When it must not be used at all: pregnancy, trying to conceive, or breastfeeding (avoid it, as with the statin class); active liver disease, or ALT above 3 times the upper limit of normal (ULN); a past episode of statin-induced muscle disease or rhabdomyolysis; taking a strong CYP3A4 inhibitor; children.
When extra caution is needed: older adults taking several medicines; reduced kidney function (citrinin can accumulate); an underactive thyroid (which itself raises the risk of muscle disease); a history of liver disease.
One more trap almost everyone falls into: treating red yeast rice as something you do not need to tell your doctor about. Mention it before any surgery or anesthesia (bleeding and liver-metabolism risks), and before starting any new prescription drug (interactions). It is just a supplement is the most common, and most dangerous, mistake in this area.
Mechanism · Why the dose cannot be controlled
Every tablet of a prescription statin has a dose that was weighed: the active ingredient is first synthesized, then purified, then pressed into tablets by the milligram, and the content is sampled before the batch leaves the factory. The monacolin K in red yeast rice does not come that way; it is grown by Monascus on the rice grain. That difference is the whole reason content on the same kind of shelf can differ by two orders of magnitude.It is a by-product of the mold, not the mold's main job
When Monascus grows on rice, its first task is to stay alive and reproduce. Monacolin K is one of its secondary metabolites: not needed to stay alive, but made in larger amounts when conditions suit and in smaller amounts when they do not. Fungi often make molecules like this to hold back other microbes competing for the same patch, and the function that helps Monascus happens, in a human, to block the enzyme liver cells use to make cholesterol. So from start to finish, nobody is responsible for your dose: how much of this molecule gets made answers to the mold's circumstances, not to your lab sheet.
Every variable can push the yield off course
Different strains of the same species differ enormously in output. Which rice is used, how thoroughly it is steamed and how thick it is spread decide how deep the fungal threads can reach. Culture temperature, humidity, airflow and time each change the yield. How the finished ferment is dried, milled and blended across batches shuffles it all again. What the manufacturer can control is how many grams of red yeast rice powder went in; what your body cares about is how many milligrams of monacolin K that powder contains. A whole biological process sits between those two, and most products have never measured the second number.
Why citrinin shows up with it
Citrinin is also a secondary metabolite (Penicillium, Aspergillus and other molds make it too). Only some Monascus strains make it, and like monacolin K, how much gets made depends on the same set of variables: strain, temperature and culture time. That means fermenting a bit longer does not necessarily buy you only more of the active compound. Separating the two depends on choosing low-citrinin strains and actually testing before the product ships, and neither step is something the words naturally fermented on the package can do.
So which line on the label to read
A label that says only red yeast rice powder X mg is giving the weight of the raw material, not the amount of drug. Only a label that states the milligrams of monacolin K, backed by third-party testing, is telling you what you actually swallow. That is also why the red yeast rice preparations that did well in clinical trials were all standardized extracts: after the grown step, they added the weighed step.
Chapter 5
Should I take it?
Most people should not take red yeast rice. It is not a milder statin; it is a statin with no dose on the label: the dose is unknown, it may carry a mycotoxin, and no doctor is checking your liver enzymes and .
None of these people should use it: healthy people taking it for prevention; people already on a prescription statin; people at high risk who need low-density lipoprotein cholesterol () cut by more than half; anyone pregnant, trying to conceive or breastfeeding; anyone unwilling to have blood tests. The window where it can be considered is narrow: moderate risk, a genuine intolerance to prescription statins, and a doctor who agrees to monitor.
If your lab results make you think of red yeast rice, the real question is should I take a statin, and that is something to decide with a doctor, based on your cardiovascular risk.
None of these people should use it: healthy people taking it for prevention; people already on a prescription statin; people at high risk who need low-density lipoprotein cholesterol () cut by more than half; anyone pregnant, trying to conceive or breastfeeding; anyone unwilling to have blood tests. The window where it can be considered is narrow: moderate risk, a genuine intolerance to prescription statins, and a doctor who agrees to monitor.
If your lab results make you think of red yeast rice, the real question is should I take a statin, and that is something to decide with a doctor, based on your cardiovascular risk.
In practice · Who should not, and who might
When you should not use it (the great majority of cases):1. Healthy people taking it as prevention
Normal low-density lipoprotein cholesterol (, < 130 mg/dL) and no risk of atherosclerotic cardiovascular disease ()Red yeast rice only adds exposure to a statin at an unknown dose, with no benefitIn low-risk people, the evidence for lowering cholesterol to prevent heart disease is weak2. You are already on a prescription statin
Do not add it: stacking a second dose you cannot measure raises the risk of rhabdomyolysis.Worried about side effects and want to switch? Ask your doctor about a lower dose, a different statin or taking it every other day; do not swap in red yeast rice on your own.3. You are at high ASCVD risk (10-year risk > 20%, a past cardiovascular event, or diabetes with LDL > 130)
You need LDL down by 50% or more, and red yeast rice is not a big enough dose.You should go straight to a high-intensity prescription statin (atorvastatin 40–80 mg or rosuvastatin 20–40 mg).Using red yeast rice downgrades a life-saving drug to a comfort.4. Pregnancy, trying to conceive, breastfeeding: an absolute contraindication, because statins carry a risk to the fetus.
5. You will not have blood tests before and after: any cholesterol-lowering treatment needs liver enzymes (, ) checked before starting, with (CK) added when needed, and a recheck at 4–12 weeks. If you will not be tested, you should not use it.
When it could be considered (a narrow window):
1. Moderate risk and a genuine intolerance to prescription statins
You have tried ≥ 2 statins, including every-other-day and very low doses, and all caused muscle pain.Your doctor agrees to a trial of red yeast rice with ALT and CK monitoring.You use a third-party-certified product that states its monacolin K content (hard to find in North America, and restricted by regulators in Europe).Typical dose: 5–10 mg of monacolin K a day (equal to 1200–2400 mg of standardized extract).2. Prescribed Xuezhikang (China)
This is a prescription-grade product, unlike over-the-counter red yeast rice on Western shelves.It is a legitimate option within Chinese guidelines.
If you do use it, how to judge quality:
Third-party certification: USP, NSF, ConsumerLabA clear statement of monacolin K in milligrams (not red yeast rice powder 600 mg but monacolin K 5 mg)Citrinin testing not detected, or < 0.2 μg/gBatch-to-batch stability dataBrands: US over-the-counter brands are too loosely regulated and test too unevenly for any to be recommended here; in North America, the safer approach is to discuss a low-dose prescription statin with a doctor.
The real comparison with a prescription statin:
| Dimension | Red yeast rice | Prescription statin |
|---|---|---|
| LDL reduction | 20–25% | 25–55% (dose adjustable) |
| Standardization | Poor | Good |
| Price (US) | About $20–40/month | Generic lovastatin or atorvastatin about $5–15/month |
| Medical monitoring | None | Complete |
| Side-effect profile | Same | Same |
| Pregnancy contraindication | Same | Same |
| Drug interactions | Same | Same |
What the extra money for natural buys you is an uncontrolled dose, a possible mycotoxin, zero medical follow-up, and a higher price.
> Red yeast rice is not a mild statin; it is a statin with no dose on the label.
> It moves through a regulatory gap, passing every side effect and interaction of a prescription drug straight on to you while removing the doctor's safety net.
> If your cholesterol really needs lowering, see a doctor; if it does not, red yeast rice should not be on your list either.
> A natural middle ground does not exist here.
Myth · Two illusions of a natural statin
The natural statin pitch rests on two illusions. Let us check them one at a time.Illusion 1: It is food, not a drug
Fact: red yeast rice contains the same molecule as lovastatin.Red yeast rice used in cooking (to color food or make red fermented rice wine) has very little of it (< 0.1 mg/g). That is food.Red yeast rice supplements go through strain selection, optimized culture and concentration, and their monacolin K concentration can be 50–500 times that of the food. That is not food; it is a drug.An analogy: the salicin in willow bark is the forerunner of aspirin, and chewing willow bark counts as an herbal remedy; aspirin (acetylsalicylic acid) pressed into tablets by the milligram is a drug. A natural source does not change whether a molecule is a drug; dose and purity do.
Illusion 2: Because it is natural, it has fewer side effects
Fact: monacolin K's side-effect profile is the same as lovastatin's.The muscle pain and raised liver enzymes seen in red yeast rice trials are the same kind of side effects as with a low-dose statin.Red yeast rice is well tolerated usually because its content, and so its effective dose, is low, not because natural is gentler.Equal doses compared: by the mechanism, monacolin K 10 mg and lovastatin 10 mg are the same molecule at the same dose, so their side-effect rates should be the same.
The real safety ladder (from the weakest drop to the strongest):
1. Diet plus exercise: LDL down 5–15%, no side effects
2. Soluble fiber (β-glucan, from oats and barley): LDL down 5–10%, no side effects
3. Plant sterols and stanols: LDL down 5–10%, no side effects (the US FDA allows a health claim for them)
4. Red yeast rice or a low-dose prescription statin: LDL down 20–30%, side effects uncommon but real
5. A moderate- to high-dose prescription statin: LDL down 30–55%, with side effects rising with the dose
6. PCSK9 inhibitors (a class of injected cholesterol-lowering drugs): LDL down 50–60%, with a different side-effect profile
Red yeast rice is not among the first 3 options with no side effects; it sits at number 4 (the same as a low-dose statin). Treating it as a fortified food puts it in the wrong place.
So:
> If your LDL makes you want to try red yeast rice, the question to ask is not which brand of red yeast rice but should I take a statin.
> The answer comes from a cardiologist plus a calculation of your 10-year risk.
> Skipping that step and buying red yeast rice hands a medical decision to shopping-site reviews instead of to medicine.
References · 5
- Cohen, P. A., Avula, B., & Khan, I. A. (2017). Variability in strength of red yeast rice supplements purchased from mainstream retailers. European Journal of Preventive Cardiology, 24(13), 1431-1434. 28 brands analysed by UHPLC-DAD-QToF; monacolin K undetectable in 2, and across the remaining 26 it ranged 0.09-5.48 mg per 1200 mg of red yeast rice — 0.09 to 10.94 mg per day at the manufacturers' own recommended servings (a 120-fold spread). 10.1177/2047487317715714
- Gordon, R. Y., Cooperman, T., Obermeyer, W., & Becker, D. J. (2010). Marked variability of monacolin levels in commercial red yeast rice products: buyer beware! Archives of Internal Medicine, 170(19), 1722-1727. 12 commercial formulations assayed: total monacolins 0.31-11.15 mg/capsule, monacolin K (lovastatin) 0.10-10.09 mg/capsule; 4 of the 12 had elevated levels of the nephrotoxic mycotoxin citrinin. 10.1001/archinternmed.2010.382
- EFSA Panel on Food Additives and Nutrient Sources added to Food. (2018). Scientific opinion on the safety of monacolin K from red yeast rice. EFSA Journal, 16(8), 5368. 10.2903/j.efsa.2018.5368
- Becker, D. J., Gordon, R. Y., Halbert, S. C., French, B., Morris, P. B., & Rader, D. J. (2009). Red yeast rice for dyslipidemia in statin-intolerant patients: a randomized trial. Annals of Internal Medicine, 150(12), 830-839. 10.7326/0003-4819-150-12-200906160-00006
- Lu, Z., Kou, W., Du, B., Wu, Y., Zhao, S., Brusco, O. A., et al. (2008). Effect of Xuezhikang, an extract from red yeast Chinese rice, on coronary events in a Chinese population with previous myocardial infarction. American Journal of Cardiology, 101(12), 1689-1693. China Coronary Secondary Prevention Study: nearly 5,000 patients with previous MI and average LDL randomized to Xuezhikang or placebo for a mean of 4.5 years. Major coronary events 10.4% vs 5.7% (absolute reduction 4.7%, relative 45%); cardiovascular and total mortality fell 30% and 33%. Xuezhikang is a standardized red yeast rice extract, not a retail supplement (abstract, PMID 18549841). 10.1016/j.amjcard.2008.02.056