Tongkat Ali (Eurycoma longifolia)

Tongkat ali, also called Malaysian ginseng, is a root extract from Eurycoma longifolia traditionally used in Southeast Asia as a tonic. The modern clinical story focuses on its dual effect: trials show it raises testosterone in men with low or borderline baseline levels, and it reduces cortisol and stress markers across mixed populations. That combination of androgen and stress effects is what makes it interesting to consumer brands. Most stress ingredients don't touch testosterone, and most testosterone boosters don't have a stress story.

The ingredient hit a cultural moment when Andrew Huberman discussed it on his podcast, and the men's-vitality category has been catching up to that demand ever since. The standardization marker that matters is eurycomanone content. Look for extracts standardized to 2% eurycomanone or higher; the most-cited branded forms are Physta (KSM-66's parent company, Ixoreal, also licenses related extracts) and Tongkat Ali Standardized 100:1.

Quality control is the buying problem. Tongkat ali is one of the more commonly adulterated supplement ingredients on Asian wholesale markets. Counterfeit extracts cut with synthetic steroids or anabolic compounds have shown up in retail products as recently as 2024. We work with audited suppliers who provide third-party testing including HPLC eurycomanone content and full anabolic screening. Don't buy this ingredient on price alone.