Gamma Oryzanol
Research reviewed: Up until 03/2026
Gamma Oryzanol (Gamma-oryzanol) is a dietary supplement with 5 published peer-reviewed studies involving 412 participants, researched for Cholesterol Management, Sports Performance & Muscle Strength, Metabolic Health.
Evidence at a Glance
Strength is scored by study design, sample size, study type, and outcomes
Cholesterol Management
ModerateSports Performance & Muscle Strength
WeakMetabolic Health
ModerateResearch Visualised
Visual breakdown of the clinical data.
Study Quality Breakdown
What types of studies were conducted
Participants Per Study
Larger samples = more reliable results
Research Timeline
When the studies were published
All Studies
Detailed breakdown of each trial. Click to expand.
Cholesterol Management
To evaluate effects of rice bran oil containing gamma-oryzanol on lipid profiles and cholesterol in hyperlipidemic subjects
Study Type
Randomized, double-blind, controlled
Purpose
To evaluate effects of rice bran oil containing gamma-oryzanol on lipid profiles and cholesterol in hyperlipidemic subjects
Dose
Rice bran oil with varying gamma-oryzanol content
Participants
Hyperlipidemic subjects
Duration
4 weeks
Results
Low and high gamma-oryzanol rice bran oil significantly lowered total plasma cholesterol (6.3%), LDL-C (10.5%), and LDL-C/HDL-C ratio (18.9%).
How They Measured It
Total cholesterol, LDL-C, HDL-C, triglycerides
To evaluate rice bran oil containing gamma-oryzanol on lipid profiles and antioxidant status in hyperlipidemic subjects
Study Type
Randomized, double-blind, controlled trial
Purpose
To evaluate rice bran oil containing gamma-oryzanol on lipid profiles and antioxidant status in hyperlipidemic subjects
Dose
Rice bran oil with gamma-oryzanol
Participants
Hyperlipidemic subjects
Duration
8 weeks
Results
Rice bran oil significantly decreased LDL-C levels compared to control, with greatest change in higher gamma-oryzanol concentrations.
How They Measured It
Lipid profiles, antioxidant markers, inflammatory markers
Sports Performance & Muscle Strength
To evaluate gamma-oryzanol supplementation on muscle strength and body composition in resistance-trained males
Study Type
Randomized, double-blind, placebo-controlled
Purpose
To evaluate gamma-oryzanol supplementation on muscle strength and body composition in resistance-trained males
Dose
Gamma-oryzanol supplementation during resistance training
Participants
Healthy males undergoing chronic resistance training
Duration
9 weeks
Results
Significant differences between supplement and placebo groups for 1-RM bench press and leg curl, showing gamma-oryzanol improved muscle strength.
How They Measured It
1-RM bench press, leg curl, anthropometric measurements
To evaluate gamma-oryzanol supplementation during resistance exercise training on strength and hormones
Study Type
Randomized, double-blind, placebo-controlled
Purpose
To evaluate gamma-oryzanol supplementation during resistance exercise training on strength and hormones
Dose
Gamma-oryzanol
Participants
Healthy untrained males
Duration
8 weeks
Results
Both gamma-oryzanol and placebo groups increased 1-RM strength similarly. No differences in hormones (testosterone, cortisol) or blood lipids.
How They Measured It
1-RM strength, vertical jump, hormone levels
Metabolic Health
To review gamma-oryzanol therapeutic uses and health benefits
Study Type
Review
Purpose
To review gamma-oryzanol therapeutic uses and health benefits
Dose
Various doses (50-500 mg/day typical)
Participants
Various study populations
Duration
Various
Results
Gamma-oryzanol demonstrates antioxidant properties and may aid in cholesterol absorption. However, substantial clinical trials still needed for many claimed effects.
How They Measured It
Literature review synthesis
Frequently Asked Questions
Common questions about Gamma Oryzanol research
There are currently 7 peer-reviewed studies on Gamma Oryzanol (Gamma-oryzanol), involving 412 total participants. Research covers Cholesterol, Sports performance, Metabolic health. The overall evidence strength is rated as Strong.
The evidence is currently rated as "Strong Evidence". This rating is based on study design quality (randomisation, blinding, placebo controls), sample sizes, study types (5 human studies), and reported outcomes.
Gamma Oryzanol has been researched for: Cholesterol, Sports performance, Metabolic health. Each area has its own body of evidence which you can explore in the study breakdowns above.
Yes, 5 out of 7 studies are human trials. Human trials carry more weight in our evidence scoring system.
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