Last verified: 17 days ago
OxyJun
Also known as: E-OJ-01, Oxyjun, Terminalia arjuna extract
Evidence under review. — Not yet rated
Arjuna bark extract. One small trial suggests it may improve heart pumping efficiency and reduce fatigue.
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What it does
OxyJun is a standardized extract of Terminalia arjuna, a tree bark used for centuries in Ayurvedic medicine for heart support. One randomized, double-blind, placebo-controlled trial found that 400...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
400 mg/day based on available study data
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Found in
What the Science Says
OxyJun is a standardized extract of Terminalia arjuna, a tree bark used for centuries in Ayurvedic medicine for heart support. One randomized, double-blind, placebo-controlled trial found that 400 mg daily for 8 weeks improved left ventricular ejection fraction (a measure of how well the heart pumps blood) by about 6% in healthy adults, compared to nearly no change in the placebo group. The same study also reported reductions in fatigue scores and a marker of heart workload called rate pressure product.
What It Doesn't Do
Not proven to treat heart disease or replace cardiac medications. One small study in healthy adults is not enough to call this a proven heart remedy. No evidence it builds endurance or athletic performance. Don't confuse 'improved pumping efficiency in healthy people' with treating actual cardiovascular conditions.
Evidence-Based Benefits
May improve heart pumping efficiency (LVEF) in healthy adults at 400 mg/day over 8 weeks.
Weak EvidenceEffective at: 400 mg/day
Supporting studies (click to view on PubMed):
Reduced fatigue severity scores by about 22% in one small clinical trial of healthy adults.
Weak EvidenceEffective at: 400 mg/day
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown — no pharmacokinetic data provided in available studies
Red Flags to Watch For
- Only one published clinical trial exists for this specific branded extract — far too little evidence to draw firm conclusions
- The single study was conducted in healthy adults, so results may not apply to people with heart conditions or other health issues
- 687 supplement products contain this ingredient despite minimal published research — widespread use does not equal proven efficacy
- Terminalia arjuna may interact with blood pressure medications and anticoagulants — consult a doctor before use
Products Containing OxyJun
See how OxyJun is used in these analyzed products:
Frequently Asked Questions
What does OxyJun do?
Arjuna bark extract. One small trial suggests it may improve heart pumping efficiency and reduce fatigue.
What is the effective dose of OxyJun?
400 mg/day based on available study data
Is OxyJun safe?
Only one published clinical trial exists for this specific branded extract — far too little evidence to draw firm conclusions
What doesn't OxyJun do?
Not proven to treat heart disease or replace cardiac medications.
Research Sources
- PMID: 36349244
- General knowledge of Terminalia arjuna traditional use
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25