is a mixture of ferulic acid esters of sterol and triterpene alcohols, that occurs in rice bran oil at a level of 1 to 2%, where it serves as natural antioxidant: it can lower the cholesterol levels in the blood (Scavariello and Arellano 1998), acting as an organic radical scavenger able to prevent AMVN-triggered lipoperoxidation (Juliano et al.
Antioxidant and anti-inflammatory activities of gamma-oryzanol
rich extracts from Thai purple rice bran.
Its three major constituents- Gamma-oryzanol
, tocotrienols and tocopherols have potential significance in human health and diet.
It also contains minor amounts of such compounds as vitamin E; plant sterols, including some that are of interest to medical and nutrition researchers because of their potentially health-imparting properties; and gamma-oryzanol
, shown to lower levels of "bad" LDL cholesterol in humans.
Rice bran, an outer layer of whole grain rice, is a rich source of the phytochemical known as gamma-oryzanol
and of two forms of vitamin E--the tocopherols and the tocotrienols.
, a mixture of phenolics derived from rice bran oil, is mainly composed of phytosteryl ferulates, which have been extensively studied for their biological activity, including their ability to act as antioxidants, lower serum cholesterol and for their anti-inflammatory and anti-tumor properties.
For instance, if a reader has diarrhea, she recommends 10 grams of L-glutamine powder with gamma-oryzanol
split into two doses on an empty stomach with water for two weeks.
Further, the presence of gamma-oryzanol
, tocopherols and other plant-based antioxidants and sterols provides a natural system to inhibit oxidative skin damage and facilitate skin repair.
Positive, but limited research has been conducted with hesperidin (a bioflavonoid) and vitamin C, vitamin B6, evening primrose oil and gamma-oryzanol
(a ferulic acid compound isolated from rice bran oil).
They found a wide variation in the concentrations of the two forms of vitamin E and of gamma-oryzanol
in the brans of all five color classes studied.
Antioxidant activity of tocopherols, tocotrienols, and gamma-oryzanol
components from rice bran against cholesterol oxidation accelerated by 2,2'-azobis (2-methylpropionamidine) dihydrochloride.
The effect of trans-ferulic acid and gamma-oryzanol
on ethanol-induced liver injury in C57BL mouse.