Tongkat Ali Root Extract
Also known as: Eurycoma longifolia, longjack, Malaysian ginseng, pasak bumi, LJ100
A root extract from a Southeast Asian shrub used in men's vitality, stress, and libido formulas. A four-week randomized trial of a standardized root extract in moderately stressed adults reported lower cortisol, higher testosterone, and improved mood-state scores. Commercial extracts are sold either as a 100:1 water extract or standardized to eurycomanone, and quality differs sharply between them, so the standardization should be specified rather than the ratio alone.
Research summary
Quassinoids such as eurycomanone are proposed to increase free testosterone by reducing sex hormone-binding globulin and to moderate cortisol under stress.
Dosage
Daily amounts, of extract.
| Lowest studied | Typical range | Highest studied | Upper limit |
|---|---|---|---|
| — | 200–400 mg | — | — |
200 to 400 mg per day of a standardized extract, usually in the morning with food. Trials generally ran four to twelve weeks. Water extracts are extremely bitter, which limits use in powders.
Standardization: 100:1 water extract or ≥2% eurycomanone (Physta / LJ100 grades vary)
Source material: root water extract
Format suitability
- Capsule
- Powder
- Tablet
- Softgel
- Gummy
- Liquid
Intensely bitter; capsules or tablets strongly preferred.
Formulation notes
Frequently combined with fenugreek, zinc, or ashwagandha. Adulteration and low-potency material are common; request eurycomanone assay.
- Not for pregnancy
Sources
Related ingredients
Ashwagandha Root Extract (KSM-66)
BotanicalA branded, root-only ashwagandha extract standardized to at least 5% withanolides.
Typical: 300–600 mg
Ashwagandha Root Extract (≥5% Withanolides)
BotanicalA generic, non-branded ashwagandha root extract standardized to at least 5% withanolides.
Typical: 300–600 mg
L-Tyrosine
Amino acidA conditionally essential amino acid that serves as the direct precursor to dopamine, norepinephrine, and epinephrine.
Typical: 500–2,000 mg
Rhodiola Rosea Extract
BotanicalA root extract from an arctic and alpine plant, standardized to rosavins and salidroside, that is used in energy, focus, and stress formulas.
Typical: 200–600 mg
Maca Root Powder
BotanicalA cruciferous root grown in the Peruvian Andes, dried and milled into a powder used in libido, energy, and hormone-balance formulas.
Typical: 1,500–3,000 mg