Gamma Oryzanol - GymBeam

Gamma Oryzanol by GymBeam is a single-ingredient food supplement in capsule form. One capsule contains 150 mg of gamma-oryzanol, derived from rice bran oil. No additional fillers, no proprietary blend, no split doses. One capsule, one ingredient, one clear amount on the label.

A grain of rice has several layers, and most people consume only the innermost one. On the outside is the husk, which is always removed because it is inedible. Beneath it lies the bran layer, a thin brown coating around the white kernel. This is where most of the rice’s notable components are found. Brown rice retains the bran. White rice loses it. Removing the bran layer is what turns brown rice into white rice, and it is also why white rice can be stored longer and cooks faster. Gamma-oryzanol is found in precisely that removed layer. Rice bran oil is pressed from rice bran and is a common cooking ingredient in Japan; gamma-oryzanol is isolated from this oil.

In other words, it is a substance from the part of rice that industrial processing discards.

While sterols address fats, ferulic acid provides the antioxidant component. It is a plant phenol, and phenols act in the body as scavengers of free radicals—molecules with an unpaired electron that are therefore unstable and seek to take an electron from something nearby. If they take one from a cell membrane or DNA, damage results. A phenol provides the electron and remains relatively stable itself, stopping the chain reaction.

One aspect of gamma-oryzanol is particularly interesting. Ferulic acid on its own is more soluble in water, but when bound to a sterol, it becomes soluble in fats. This means it can reach places that ordinary water-soluble antioxidants struggle to access: the fatty environment of cell membranes, which is particularly susceptible to oxidative damage. Animal models also describe an effect on the so-called AGE/RAGE axis, a system through which the body responds to proteins damaged by sugar. In a kidney model, gamma-oryzanol reduced markers of inflammation and oxidative stress by suppressing the activity of this receptor.³

Japanese studies from the 1970s and 1980s investigated gamma-oryzanol for menopausal symptoms, and this research led to its registration as a medicine in Japan.⁴ However, its mechanism of action has never been satisfactorily explained. The proposed hypothesis suggests an effect on luteinizing hormone, a signal from the pituitary gland that regulates the activity of the gonads. However, this effect has never been demonstrated in humans and remains speculative.

It is worth noting that older Japanese studies also examined effects on TSH levels, TSH being the hormone that regulates the thyroid gland.⁵ The methods used in these studies are weak by today’s standards, but they show how researchers at the time viewed this substance: as something that affects hormonal regulation in the brain.

Gamma-oryzanol is soluble in fat, not in water. This rules out a beverage form and effectively means it is supplied in solid capsules.

Capsules also offer two practical advantages. Each dose is measured during manufacturing: take one capsule and you get exactly 150 mg every time, with no measuring scoop or guesswork. And they are portable: ninety capsules fit in a bag pocket. Because gamma-oryzanol is fat-soluble, it makes sense to take the capsule with a meal containing some fat.

Heavy metals were measured using ICP-MS in accordance with DIN EN 15763—inductively coupled plasma mass spectrometry. This is the most sensitive widely available technique for measuring metals in food; it can detect trace amounts at the parts-per-billion level. The laboratory did not detect any of the metals tested above the limit of quantification.¹⁰

The sample complies with Regulation (EU) 2023/915¹¹ on maximum levels of contaminants in food. This testing is particularly relevant for a product derived from the bran layer of a grain. Bran is the part of the grain most exposed to the external environment, where any contaminants from the soil tend to concentrate more than in the white inner part of the grain.