Brown Rice Bran, Cereal Fiber, Dietary Fiber, Fibre Alimentaire, Fibre Céréalière, Huile de Son de Riz, Oryza sativa, Rice Bran Oil, Ricebran Oil, Riz de Son, Salvado de Arroz, Son de Riz, Son de Riz Brun, Son de Riz Stabilisé, Stabilized Rice Bran.


Overview Information

Rice is a plant. The outer layer of the grain (bran) and the oil made from the bran are used for medicine. Rice bran oil is popular as a "healthy oil" in Japan, Asia, and particularly India. Be careful not to confuse rice bran with other forms of bran such as oat and wheat bran.

Rice bran is used for diabetes, high blood pressure, high cholesterol, and many other conditions, but there is no good scientific evidence to support many of these uses.

Rice bran oil is also used for high cholesterol.

Some people apply rice bran directly to the skin for an allergic skin rash called eczema (ectopic dermatitis).

How does it work?

Rice bran might help lower cholesterol because the oil it contains has substances that might decrease cholesterol absorption and increase cholesterol elimination. One of the substances in rice bran might decrease calcium absorption; this might help reduce the formation of certain types of kidney stones.


Uses & Effectiveness?

Possibly Effective for

  • Eczema (atopic dermatitis). Putting rice bran broth on the skin seems to reduce allergic skin rash.
  • Stomach cancer. Eating dietary fiber, such as rice bran, can decrease the risk of stomach cancer.
  • High levels of calcium in the urine (hypercalciuria). Taking rice bran by mouth helps to prevent kidney stones in people with high levels of calcium in the urine.
  • High cholesterol. Following a low-fat diet and taking 85 grams of full-fat rice bran per day seems to lower total cholesterol by 8% and "bad" low-density lipoprotein (LDL) cholesterol by 14%. But taking rice bran in a reduced-fat form doesn't work as well. Rice bran does not seem to affect other blood fats such as triglycerides or "good" high-density lipoprotein (HDL) cholesterol. Rice bran seems to work about as well as oat bran for reducing high cholesterol. However, rice bran does not seem to work as well as beta-glucans, another form of fiber, for lowering cholesterol.
    Rice bran oil also seems to reduce LDL (or "bad") cholesterol and total cholesterol. The more gamma-oryzanol the rice bran oil contains, the better it seems to work.

Possibly Ineffective for

  • Colon cancer, rectal cancer. Eating dietary fiber, such as rice bran, doesn't seem to reduce the risk of colon or rectal cancer.

Insufficient Evidence for

  • Male-pattern baldness (androgenic alopecia). Early research shows that applying rice bran to the scalp seems to improve hair thickness in men, but not women, with androgenic hair loss.
  • Diabetes. Early research shows that eating stabilized rice bran seems to be no better than milled rice flour for reducing blood sugar in people with type 2 diabetes.
  • Bad breath. Early research shows that swishing rice bran oil in the mouth and then spitting it out reduces bad breath in pregnant women with bad breath. However, swishing with sesame oil or chlorhexidine seem to work as well as rice bran oil.
  • Insomnia. Early research shows that taking rice bran might improve sleep.
  • High blood pressure.
  • Alcoholism.
  • Obesity.
  • Athletic performance.
  • Strengthening the immune system.
  • Increasing energy.
  • Improving liver function.
  • Heart and blood vessel disease.
  • Other conditions.
More evidence is needed to rate the effectiveness of rice bran for these uses.

Side Effects

Side Effects & Safety

When taken by mouth: Rice bran is LIKELY SAFE for most people when taken by mouth. Increasing the amount of bran in the diet can cause unpredictable bowel movements, intestinal gas, and stomach discomfort during the first few weeks.

When applied to the skin: Rice bran is POSSIBLY SAFE for most people when added to baths or put on the scalp. However, rice bran can cause itching and skin redness. People have experienced rash and itching from rice bran infested with a pest called the straw itch mite, but this is rare.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Rice bran is LIKELY SAFE in amounts found in food. But there isn't enough reliable information to know if it's safe in the larger amounts used as medicine. Stay on the safe side and stick to food amounts.

Infants and children: Rice bran is POSSIBLY SAFE when used appropriately. It has been used in the diet of infants for up to 6 months with no side effects.

Gastrointestinal (GI) conditions: Don't use rice bran if you have a digestive tract problem such as intestinal ulcers, adhesions, conditions that cause narrowing or blockage of the digestive tract, slow digestion, or other stomach or intestinal disorders. The fiber in rice brain could block your digestive tract.

Swallowing: Use rice bran with caution if you have trouble swallowing. The fiber it contains might cause choking.



Moderate Interaction

Be cautious with this combination

  • Medications taken by mouth (Oral drugs) interacts with RICE BRAN

    Rice bran contains a large amount of fiber. Fiber can decrease how much medicine the body absorbs. Taking rice bran along with medicine you take by mouth can decrease the effectiveness of your medication. To prevent this interaction take rice bran at least one hour after medications you take by mouth.



The following doses have been studied in scientific research:


  • For lowering high cholesterol: 12-84 grams rice bran per day or 4.8 grams rice bran oil per day.
  • For reducing high levels of calcium in the urine (hypercalciuria): 10 grams rice bran twice daily for 3-5 years.

View References


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  • Anon. Consensus statement on cereals, fibre and colorectal and breast cancers. Proceedings of the European Cancer Prevention consensus meeting. Santa Margheritia, Italy, 2-5 October 1997. Eur J Cancer Prev 1998;7:S1-83. View abstract.
  • Bumrungpert A, Chongsuwat R, Phosat C, Butacnum A. Rice Bran Oil Containing Gamma-Oryzanol Improves Lipid Profiles and Antioxidant Status in Hyperlipidemic Subjects: A Randomized Double-Blind Controlled Trial. J Altern Complement Med. 2019;25(3):353-358. View abstract.
  • Calvo-Castro LA, Sus N, Schiborr C, et al. Pharmacokinetics of vitamin E, γ-oryzanol, and ferulic acid in healthy humans after the ingestion of a rice bran-enriched porridge prepared with water or with milk. Eur J Nutr. 2019;58(5):2099-2110. View abstract.
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