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Rice bran oil
Rice Bran Oil.jpeg
Bottle of rice bran oil
Fat composition
Saturated fats
Total saturated 25%
Myristic: 0.6%
Palmitic: 21.5%
Stearic: 2.9%
Unsaturated fats
Total unsaturated 75%
Monounsaturated 38%
Oleic acid 38%
Polyunsaturated 37%
Omega-3 fatty acids α-Linolenic: 2.2%
Omega-6 fatty acids Linoleic: 34.4%
Properties
Food energy per 100 g (3.5 oz) 3,700 kJ (880 kcal)
Smoke point 232 °C (450 °F)
Iodine value 99-108
Acid value 1.2
Saponification value 180-190
Unsaponifiable 3-5

Rice bran oil is the oil extracted from the hard outer brown layer of rice called bran. It is known for its high smoke point of 232 °C (450 °F) and mild flavor, making it suitable for high-temperature cooking methods such as stir frying and deep frying. It is popular as a cooking oil in East Asia, the Indian subcontinent, and Southeast Asia including India, Nepal, Bangladesh, Indonesia, Japan, Southern China and Malaysia.

Composition and properties

Rice bran oil has a composition similar to that of peanut oil, with 38% monounsaturated, 37% polyunsaturated, and 25% saturated fatty acids.

A component of rice bran oil is the γ-oryzanol, at around 2% of crude oil content. Thought to be a single compound when initially isolated, γ-oryzanol is now known to be a mixture of steryl and other triterpenyl esters of ferulic acids. Also present are tocopherols and tocotrienols (two types of vitamin E) and phytosterols.

Fatty acid composition
Fatty acid Lipid
number
Percentage
Myristic acid C14:0 0.6%
Palmitic acid C16:0 21.5%
Stearic acid C18:0 2.9%
Oleic acid (an omega-9 fatty acid) C18:1 38.4%
Linoleic acid (LA, an omega-6 fatty acid) C18:2 34.4%
α-Linolenic acid (ALA, an omega-3 fatty acid) C18:3 2.2%
Physical properties of crude and refined rice bran oil
Property Crude rice bran oil Refined oil
Moisture 0.5-1.0% 0.1-0.15%
Density (15 °C) 0.913-0.920 0.913-0.920
Refractive index 1.4672 1.4672
Iodine value 85-100 95-104
Saponification value 187 187
Unsaponifiable matter 4.5-5.5 1.8-2.5
Free fatty acids 5-15% 0.15-0.2%
Oryzanol 2.0 1.5-1.8
Tocopherol 0.15 0.05
Color (tintometer) 20Y+2.8R 10Y+1.0R

Research

Rice bran oil consumption has been found to significantly decrease total cholesterol (TC), LDL-C and triglyceride (TG) levels.

Uses

Rice bran oil is an edible oil which is used in various forms of food preparation. It is also the basis of some vegetable ghee. Rice bran wax, obtained from rice bran oil, is used as a substitute for carnauba wax in cosmetics, confectionery, shoe creams, and polishing compounds.

Isolated γ-oryzanol from rice bran oil is available in China as an over-the-counter drug, and in other countries as a dietary supplement.

Comparison to other vegetable oils

Properties of vegetable oils

The nutritional values are expressed as percent (%) by mass of total fat.
Type Processing
treatment
Saturated
fatty acids
Monounsaturated
fatty acids
Polyunsaturated
fatty acids
Smoke point
Total Oleic
acid
(ω-9)
Total α-Linolenic
acid
(ω-3)
Linoleic
acid
(ω-6)
ω-6:3
ratio
Avocado 11.6 70.6 52–66 13.5 1 12.5 12.5:1 250 °C (482 °F)
Brazil nut 24.8 32.7 31.3 42.0 0.1 41.9 419:1 208 °C (406 °F)
Canola 7.4 63.3 61.8 28.1 9.1 18.6 2:1 238 °C (460 °F)
Coconut 82.5 6.3 6 1.7 175 °C (347 °F)
Corn 12.9 27.6 27.3 54.7 1 58 58:1 232 °C (450 °F)
Cottonseed 25.9 17.8 19 51.9 1 54 54:1 216 °C (420 °F)
Flaxseed/linseed 9.0 18.4 18 67.8 53 13 0.2:1 107 °C (225 °F)
Grape seed   10.5 14.3 14.3   74.7 74.7 very high 216 °C (421 °F)
Hemp seed 7.0 9.0 9.0 82.0 22.0 54.0 2.5:1 166 °C (330 °F)
Olive 13.8 73.0 71.3 10.5 0.7 9.8 14:1 193 °C (380 °F)
Palm 49.3 37.0 40 9.3 0.2 9.1 45.5:1 235 °C (455 °F)
Peanut 16.2 57.1 55.4 19.9 0.318 19.6 61.6:1 232 °C (450 °F)
Rice bran oil 25 38.4 38.4 36.6 2.2 34.4 15.6 232 °C (450 °F)
High-oleic safflower oil 7.5 75.2 75.2 12.8 0 12.8 very high 212 °C (414 °F)
Sesame 14.2 39.7 39.3 41.7 0.3 41.3 138:1
Soybean partially hydrogenated 14.9 43.0 42.5 37.6 2.6 34.9 13.4:1
Soybean 15.6 22.8 22.6 57.7 7 51 7.3:1 238 °C (460 °F)
Walnut oil unrefined 9.1 22.8 22.2 63.3 10.4 52.9 5:1 160 °C (320 °F)
Sunflower 8.99 63.4 62.9 20.7 0.16 20.5 128:1 227 °C (440 °F)
Cottonseed hydrogenated 93.6 1.5 0.6 0.2 0.3 1.5:1
Palm hydrogenated 88.2 5.7 0
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