Adverse Effects of Rice Bran Oil

Updated February 21, 2017

Rice bran oil is a liquid derived from the outer layer of a grain of rice. Despite its use in herbal medicine to lower cholesterol levels, to prevent kidney disease and stomach calcium and to treat allergic dermatitis rashes, rice bran oil poses a risk for side effects in some patients.

Common Side Effects

Common side effects of rice bran oil include gas, flatulence, stomach discomfort and changes in regularity.

Time Frame

Typically, the side effects of rice bran oil are most common only during the first few weeks of usage as a result of your body adjusting to the bran component of the supplement, according to

Straw Itch Mite

Some patients have experienced skin side effects when adding rice bran oil to the bath as a treatment for dermatitis and other skin rashes due to the presence of the straw itch mite in the supplement. This pest is not found in all rice bran oil products, but it does have the potential to cause skin irritation, itching and redness.


Rice bran oil lowers the amount of blood calcium in the body, making it useful for the prevention of kidney stones; however, this function of rice bran oil also makes the supplement dangerous for people with osteoporosis or a condition called hypocalcaemia, a type of calcium deficiency. In addition, patients with anaemia, intestinal ulcers or conditions that cause difficulty swallowing or digestion also may find their conditions exacerbated by rice bran oil.


If you are pregnant or nursing, talk to your doctor before using a rice bran oil supplement.

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About the Author

Faith Davies has been writing professionally since 1996, contributing to various websites. She holds an LAH insurance license in the state of Pennsylvania and has experience as a bank branch manager and lending officer. Davies graduated cum laude from the University of Pittsburgh with a Bachelor of Arts in art history.