People mainly take Synephrine for focus. Based on 5 first-hand reports and 2 meta-analyses & systematic reviews in the medical literature. Ranked #1361 of 1,974 overall.
Of reports that state an outcome, 50% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: Based on the analyzed clinical studies, synephrine tends to raise blood pressure and heart rate, and there is no evidence that synephrine can facilitate weight loss. Further studies are needed to confirm evidence of its safety and efficacy.
PubMed 36235672 ↗Conclusion: To examine the safety and efficacy of citrus aurantium, an herb now commonly used as a substitute for ephedra in dietary supplements marketed to promote weight loss, we conducted a systematic review. An extensive search of MEDLINE, EMBASE, BIOSIS, and the Cochrane Collaboration Database identified only 1 eligible randomized placebo controlled trial, which followed 20 patients for 6 weeks, demonstrated no statistically significant benefit for weight loss, and provided limited information about the safety of the herb.
PubMed 15541270 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“I personally ordered one of each of these, enjoy.”
“Even the synephrine from bitter orange extract produces a fairly similar subjective effect to prescription ADHD medications”
“Synephrine is similar as well”
“You have higenamine, you don't need hordenine and synephrine”
“Synephrine. Same thing as yohimbine. I guess I am just stim sensitive?”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate