The short answer. There isn't much data on Tongkat yet — 9 mentions, 2 with a clear outcome — so treat these numbers as anecdotal. There is a moderate body of research — 6 meta-analyses and 2 trials.
From 9 mentions in total — the rest didn't say how it went and aren't counted.
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: longifolia supplementation for enhancing testosterone production. Although more research is required before its use in clinical practice, this may represent a safe and promising therapeutic option, particularly in hypogonadal men.
PubMed 36013514 ↗Conclusion: Based on current evidence, the herbal extract of Tongkat Ali may have clinical effect on erectile function. However, more efficacy trials are warranted to further support current evidence.
PubMed 26365449 ↗Conclusion: Our investigation revealed that human studies evaluating the efficacy of ED-S ingredients are limited and have yielded no definitive findings of the effects on ED. Patients considering ED-S use should receive appropriate counseling, given the prevalence of disingenuous reviews and the ready availability of Food and Drug Administration-approved drug therapies. Balasubramanian A, Thirumavalavan N, Srivatsav A, et al. An Analysis of Popular Online Erectile Dysfunction Supplements. J Sex Med 2019;16:843-852.
PubMed 31036522 ↗Conclusion: However, more research should be done in the future focusing on the efficiency of E. longifolia for veterinary medicine utilisation.
PubMed 35845951 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“Tongkat and tribulus are in my daily stack now. They definitely synergized well together.”
“List of things I’ve tried (some worked, but only for a few days and then never worked again): MACA, TONGKAT, SHILAJIT, TYROSINE, CORDYCEPS, WELLBUTRIAN, B6 & D3, SULBUTIAMINE, TRIBULUS, HORNY GOAT WEED, SAFFRON, FENUGREEK”
“I very occasionally take tongkat, less than once a week usually. I’m not really sure if it does anything at that frequency, but I feel it makes me feel just a little bit more -oomph- if that makes sense.”
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 3, 2026. How we rate