Bitter orange
Bitter orange (synephrine) is structurally similar to ephedrine but less potent. Marketed as a 'safe' ephedra alternative for fat loss after ephedra was banned. D-GRADE for all graded outcomes including alertness, anxiety, headaches, and blood glucose (all showing no effect). May modestly increase metabolic rate but lacks compelling fat loss evidence. SAFETY CONCERNS: Case reports of cardiovascular events (stroke, MI) particularly when combined with caffeine. FDA has expressed concerns. Less dangerous than ephedrine but not risk-free.
Quick Answer
What it is
Bitter orange (synephrine) is structurally similar to ephedrine but less potent. Marketed as a 'safe' ephedra alternative for fat loss after ephedra was banned.
Key findings
- Grade D: Blood glucose (Weight Loss & Maintenance)
- Grade D: Alertness
- Grade D: Anxiety Symptoms
Safety
- Less dangerous than ephedrine but not risk-free.
ℹ️ Quick Facts: Bitter orange
Quick Facts: Bitter orange
- Best Evidence:Grade D
- Conditions Studied:7
- Research Outcomes:20
- Key Effect:Metabolic Health
Detailed Outcomes
Evidence by Condition
Best grade per condition (each condition may have multiple outcomes)
Research Citations (19)
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