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Health benefits Red yeast rice:Health benefits /Interactions/Safety and side effects

 

Red yeast rice

Red yeast rice is a product of yeast (Monascus purpureus) that is grown on white rice. The powdered yeast-rice mixture is a dietary staple in Asia, and it has been used in traditional Chinese medicine.

Red yeast rice is available as an oral supplement.

Red yeast rice might contain compounds that lower cholesterol levels. One of these compounds is monacolin K, which is also found in the prescription cholesterol-lowering drug lovastatin (Altoprev).

People take red yeast rice as an oral supplement to improve cholesterol and heart health.

Red yeast rice


Evidence

Studies on the use of red yeast rice for specific conditions show:

  • High cholesterol (hyperlipidemia).A study has shown that red yeast rice may lower your total blood cholesterol level, your low-density lipoprotein (LDL or bad) cholesterol level, and your triglyceride level.

Our take

Caution

Red yeast rice can lower blood cholesterol levels. While the supplement is generally considered safe, it might have the same side effects as statin cholesterol drugs.

Red yeast rice might be cheaper than a statin, but there is no guarantee of quality or the amount of active ingredient in the product. Some red yeast products might contain only a small amount of monacolin K and may have little effect on cholesterol. When levels are adjusted, the machine will move to the next step.

Safety and side effects

Red yeast rice can cause mild side effects, such as:

  • Abdominal discomfort
  • Heartburn
  • Gas
  • Headache
  • Dizziness

Some red yeast rice might contain a substance called monacolin K. This substance is the same ingredient as in the prescription cholesterol-lowering drug lovastatin. Lovastatin can cause liver damage and muscle disorders (myopathy).

Don't consume red yeast rice if you are pregnant or breastfeeding.

An older study raised the concern that some red yeast rice products may contain a contaminant called citrinin which can cause kidney failure. However a more recent study that analyzed 14 red yeast rice dietary supplements found that none of them contained citrinin.

Interactions

Possible interactions include:

  • Alcohol.Do not drink alcohol if you are taking red yeast rice. The combination might increase the risk of liver damage.
  • Cyclosporine (Neoral, Sandimmune).Taking this immunosuppressive drug with red yeast rice might increase the risk of muscle damage.
  • Cytochrome P450 3A4 (CYP3A4) inhibitors.Taking drugs such as erythromycin that inhibit this enzyme might increase the risk of harmful red yeast rice side effects.
  • Grapefruit.The side effects of taking red yeast rice supplements might increase if you drink grapefruit juice.
  • Gemfibrozil (Lopid).Taking this cholesterol medication with red yeast rice might increase the risk of muscle pain.
  • Some drugs, herbs, and supplements can be harmful to the liver.Some people might get liver damage from taking red yeast rice with drugs like monacolin K. Taking red yeast rice along with these other supplements and herbs might increase the risk of liver damage.
  • Niacin.Taking red yeast rice with high doses of niacin may increase the risk of myopathy.
  • St. John's wort.Taking this supplement with red yeast rice might lessen the effectiveness of red yeast rice.
  • Statin.Taking red yeast rice with other cholesterol-lowering medications might increase the risk of harmful side effects.
Health benefits Red yeast rice:Health benefits /Interactions/Safety and side effects

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