Herbs & botanicals
Tongkat Ali (Eurycoma Longifolia)
Names you may see: Eurycoma longifolia, tongkat ali, longjack
The quick take
Eurycoma longifolia, also called tongkat ali or longjack, is a botanical used in some men’s wellness products.
A closer look
What forms will I see on a label?
Most clinical research evaluates particular standardized root extracts. An extract’s concentration and composition matter when comparing products.
Why people use it
Tongkat ali appears in men's wellness blends marketed for libido and vitality. Interest in testosterone support also drives research into particular extracts.
These are common goals and marketing uses. The evidence section below explains what research supports.
What does the evidence tell us?
One randomized trial examined a standardized aqueous root extract in ageing men. Its findings cannot be assumed to apply to every extract, age group or training goal.
What should I know before using it?
Seek medical assessment for symptoms of a hormone disorder rather than using a supplement as a substitute for diagnosis.
Sources & further reading
Published clinical study (PubMed) ↗
Content reviewed: September 30, 2026
General educational information. Follow the product label and seek individual advice when needed.