Tongkat Ali

Last Updated: November 18 2022

Eurycoma longifolia (aka longjack and tongkat ali) has a decent amount of evidence for aphrodisiac and profertility effects. Some evidence suggests antiestrogen and proerectile effects, too, but the evidence for “testosterone boosting” is not convincing.

Tongkat Ali is most often used for

Summary

Eurycoma longifolia Jack is the herb name for what is more commonly known as Tongkat Ali, Malaysian Ginseng, or Longjack.

The aphrodisiac effects of Eurycoma are quite reliable and appear to span a large variety of animal models, limited evidence in female rats but it appears to affect these to a similar extend as in males. It is difficult to do a comparative analysis between other herbal aphrodisiac to assess potency, but Eurycoma is anecdotally one of the better ones.

In addition to the aphrodisiac effects, Eurycoma can also increase sperm production and may directly act as a proerectile agent. At least one molecule in Eurycoma (9-hydroxycanthin-6-one) is associated with both a delay in ejaculation as well as pro-erectile properties (although the ability of this molecule to act via consuming Eurycoma extract is not known).

Hormonally, Eurycoma appears to have remarkable anti-estrogenic effects in vitro and has a potency similar to Tamoxifen when the active ingredient is injected. Promising, but no human studies exist on it currently or studies assessing oral intake of Eurycoma Extract. On the testosterone side of things, the literature appears to be needlessly promising. No peer-reviewed evidence currently establishes Eurycoma as a testosterone booster in otherwise healthy persons or rats but many studies are quick to cite presentations by an M.I Tambi claiming these boosts in testosterone. None of Dr.Tambi's research presented in conferences appears to be indexed in Medline and the claims expressed cannot be proven.

What else is Tongkat Ali known as?
Note that Tongkat Ali is also known as:
  • Longjack
  • Tongkat Ali
  • Malaysian Ginseng
  • Longjax
  • Cay Ba Binh
  • Pasak Bumi
  • Langir Siam
  • Tung Sawa
  • Eurycoma Longifolia
Dosage information

The standard dosage of eurycoma longifolia jack is 200-300mg of a 100:1 extract (the concentration is based on the eurycomamone content), which at least in regards to eurycomamone is as effective as 20-30g of the dry root of the plant.

This dose tends to be taken in 1-2 doses throughout the day, and it is unsure if this is the optimal dose.

Join our supplement information course

Enter your email for a FREE five-day course on supplements. Get only the information that’s 100% backed by science. We take an independent and unbiased approach to figure out what works (and what’s a waste of time and money).

Examine is the only 100% independent company in the nutrition and supplement industry. While everyone else sells supplements and works with sponsors, we exclusively analyze research.

    The only 100% independent company. While everyone sells supplements, we only analyze research.

    Examine Database: Tongkat Ali
    What works and what doesn't?

    Unlock the full potential of Examine

    Get started

    Don't miss out on the latest research

    Become an Examine Insider for FREE to stay on top of the latest nutrition research, supplement myths, and more

      References
      2.^Saadiah Abdul Razak H, Shuid AN, Naina Mohamed ICombined Effects of Eurycoma longifolia and Testosterone on Androgen-Deficient Osteoporosis in a Male Rat ModelEvid Based Complement Alternat Med.(2012)
      3.^Chua LS, Amin NA, Neo JC, Lee TH, Lee CT, Sarmidi MR, Aziz RALC-MS/MS-based metabolites of Eurycoma longifolia (Tongkat Ali) in Malaysia (Perak and Pahang)J Chromatogr B Analyt Technol Biomed Life Sci.(2011 Dec 15)
      4.^Miyake K, Tezuka Y, Awale S, Li F, Kadota SQuassinoids from Eurycoma longifoliaJ Nat Prod.(2009 Dec)
      8.^Chiou WF, Wu TS9-Hydroxycanthin-6-One Induces Penile Erection and Delays EjaculationJ Sex Med.(2011 May 13. doi: 10.1111/j.1743-6109.2011.02296.x. {Epub ahead of print})
      14.^Low BS, Ng BH, Choy WP, Yuen KH, Chan KLBioavailability and pharmacokinetic studies of eurycomanone from Eurycoma longifoliaPlanta Med.(2005 Sep)
      15.^Tambi MI, Imran MKEurycoma longifolia Jack in managing idiopathic male infertilityAsian J Androl.(2010 May)
      17.^Zanoli P, Zavatti M, Montanari C, Baraldi MInfluence of Eurycoma longifolia on the copulatory activity of sexually sluggish and impotent male ratsJ Ethnopharmacol.(2009 Nov 12)
      21.^Ang HH, Lee KL, Kiyoshi MEurycoma longifolia Jack enhances sexual motivation in middle-aged male miceJ Basic Clin Physiol Pharmacol.(2003)
      24.^Ang HH, Lee KLEffect of Eurycoma longifolia Jack on libido in middle-aged male ratsJ Basic Clin Physiol Pharmacol.(2002)
      28.^Ismail SB, Wan Mohammad WM, George A, Nik Hussain NH, Musthapa Kamal ZM, Liske ERandomized Clinical Trial on the Use of PHYSTA Freeze-Dried Water Extract of Eurycoma longifolia for the Improvement of Quality of Life and Sexual Well-Being in MenEvid Based Complement Alternat Med.(2012)
      33.^Wahab NA, Mokhtar NM, Halim WN, Das SThe effect of eurycoma longifolia Jack on spermatogenesis in estrogen-treated ratsClinics (Sao Paulo).(2010)
      34.^Chan KL, Low BS, Teh CH, Das PKThe effect of Eurycoma longifolia on sperm quality of male ratsNat Prod Commun.(2009 Oct)
      35.^Erasmus N, Solomon MC, Fortuin KA, Henkel RREffect of Eurycoma longifolia Jack (Tongkat ali) extract on human spermatozoa in vitroAndrologia.(2012 Oct)
      36.^Frydrychová S, Opletal L, Macáková K, Lustyková A, Rozkot M, Lipenský JEffects of herbal preparation on libido and semen quality in boarsReprod Domest Anim.(2011 Aug)
      38.^Ooi FK, Singh R, Sirisinghe RG, Ang B, Jamalullail SEffects of a herbal ergogenic drink on cycling performance in young cyclistsMalays J Nutr.(2001 Mar)
      39.^Chen CK, Muhamad AS, Ooi FKHerbs in exercise and sportsJ Physiol Anthropol.(2012 Mar 8)
      40.^Diamond TH, Thornley SW, Sekel R, Smerdely PHip fracture in elderly men: prognostic factors and outcomesMed J Aust.(1997 Oct 20)
      41.^Forsén L, Sogaard AJ, Meyer HE, Edna T, Kopjar BSurvival after hip fracture: short- and long-term excess mortality according to age and genderOsteoporos Int.(1999)
      42.^Vanderschueren D, Jans I, van Herck E, Moermans K, Verhaeghe J, Bouillon RTime-related increase of biochemical markers of bone turnover in androgen-deficient male ratsBone Miner.(1994 Aug)
      43.^Tajul Ariff AS, Soelaiman IN, Pramanik J, Shuid ANEffects of Eurycoma longifolia on Testosterone Level and Bone Structure in an Aged Orchidectomised Rat ModelEvid Based Complement Alternat Med.(2012)
      44.^Tambi MI, Imran MK, Henkel RRStandardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadismAndrologia.(2011 Jun 15. doi: 10.1111/j.1439-0272.2011.01168.x. {Epub ahead of print})
      46.^Ramli R, Khamis MF, Shuid ANBone Micro-CT Assessments in an Orchidectomised Rat Model Supplemented with Eurycoma longifoliaEvid Based Complement Alternat Med.(2012)
      50.^Tee TT, Azimahtol HLInduction of apoptosis by Eurycoma longifolia jack extractsAnticancer Res.(2005 May-Jun)
      51.^Salman SA, Amrah S, Wahab MS, Ismail Z, Ismail R, Yuen KH, Gan SHModification of propranolol's bioavailability by Eurycoma longifolia water-based extractJ Clin Pharm Ther.(2010 Dec)