NHR Science

LJ100® Tongkat Ali Extract - Naturally Restores Healthy Testosterone Levels


NHR Science

LJ100® Tongkat Ali Extract - Naturally Restores Healthy Testosterone Levels


LJ100® is a patented Eurycoma longifolia extract, backed by 16 human clinical studies to naturally restores normal healthy testosterone levels by increasing the rate of “free” testosterone from its binding hormone, sex-hormone-binding-globulin (SHBG).  LJ100® is a powerful adaptogen, works by reducing cortisol, the stress hormone, improving physical vitality, stamina and energy.*

  • Promotes Healthy Free Testosterone Levels*
  • Increases Stamina & Boosts Sports Performance*
  • Promotes Healthy Reproductive Health*
  • Promotes Healthy Immune Response*
  • Promotes Healthy Cortisol Levels*

    *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

    LJ100® Clinically Proven Benefits

    Tongkat Ali or Eurycoma longifolia Jack (ELJ), which contains quassinoids such as eurycomalacton, eurycomanon, and eurycomanol, has been reported to have aphrodisiac properties and to increase testosterone levels in men. But unknown to many, Tongkat ali has several other health benefits.

    The benefits of LJ100 come from the herbal extract, Tongkat Ali roots. Tongkat ali has been named one of the top 100 botanicals by the Malaysian government, which has acknowledged that the herb has valuable medicinal values that are indigenous to this region.


    • Promotes Healthy Free Testosterone Levels*
    • Enhances Libido, Sexual Desire & Performance*
    • Enhances sexual function and increases libido in both men and women*
    • Inhibits sex hormone binding globulin for more free testosterone in the blood*
    • Converts pregnenolone to pheromones increasing sexual desire*
    • Improves erection hardness and duration, sexual satisfaction*
    • Stimulates cGMP and cAMP, relaxing the smooth muscle that causes spontaneous penile erection*


    Maintains normal high free and total testosterone levels*
    Promotes anabolic state and reduces catabolic state helping with recovery*
    Improves endurance and stamina for adult athletes of all ages*
    Improves energy via accelerated production of adenosine triphosphate (ATP)*
    Improves performance, eg. bench press, leg press, hand grip test, arm circumference*


    Natural alternatives to testosterone replacement therapy*
    Promotes overall wellbeing and hormonal health*
    Supports vitality by maintaining healthy IGF-1 levels*
    Enhances comprehensive immunity in both middle-aged men and women*


    Maintains healthy androgen levels without affecting prostate-specific antigen (PSA) in men*


    Reduces cortisol, the stress hormone*
    Improves various mood profiles*
    Prevents dieters from binge eating to achieve successful weight loss*
    Reduces fatigue and tension*
    Reduces anger and confusion, increasing focus and concentration*

    Why LJ100® is the Only Reliable Tongkat Ali Supplement

    This ingredient is the only Tongkat Ali that is protected by a worldwide patent for the treatment of sexual dysfunction, increased testosterone, and male infertility. 

    View Patent

    “We have come to understand how LJ100® impacts endogenous testosterone production and release, as well as promoting favorable cortisol levels, and how renewed testosterone levels and cortisol balance then impact andropause, sexual health, fertility, sports & fitness performance, and immunity.”

    ANNIE ENG, Founder & President

    LJ100® is a safe, unique, standardized, patented, rigorously science-tested and proven, proprietary nutraceutical.

    LJ100® is a registered trademark of HP Ingredients Corporation. For research work, please visit lj100.com.

    *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


    NHR Science LJ100® Is Made of Tongkat Ali Root Extract

    LJ100 is made of Tongkat Ali (also known as Eurycoma longifolia), which is sustainably harvested from the rainforests of Malaysia.  

    It has been named one of the top 100 botanicals by the Malaysian government, which has acknowledged that the herb has valuable medicinal values that are indigenous to this region.

    LJ100® is a patented, proprietary extract of Eurycoma longifolia. U.S. Patent No: 7,132,117 Worldwide Patent No: WO 02/17946 A1

    View Patent

    LJ100® is a registered trademark of HP Ingredients Corporation.

    SUGGESTED USE: Take 1-3 capsules per day, or as directed by your qualified healthcare professional.

    OTHER INGREDIENTS: Vegetarian capsules (Hydroxypropyl Methylcellulose), Non-GMO Rice Flour.

    NO artificial colors, flavors or preservatives. NO wheat, gluten, soy, dairy, egg, corn, yeast, fish/shellfish, peanuts or tree nuts. Non-GMO


    LJ100® Human Clinical Research Andropause, Men’s Sexual Health

    1.  LJ100® as a Potential Natural Energizer for Healthy Aging in Men.

    First Asian Andrology 2002.  M.I.M. Tambi, S. Othman AND J.M. Saad.

    1. LJ100®, a Potent Adaptogen, Maintains Healthy Aging in Men

    International Journal of Andrology (2005). Vol. 28(Suppl 1):25-44.  Asian Journal of Andrology, Oct 2006, 0154 (448).  The Aging Male (2007). F11-Pg 92.  Tambi, M.I. Kadir, A.B.

    1. LJ100® in Managing Idiopathic Male Infertility

    Asian Journal of Andrology (2010) 12: 376–380.  Mohd Ismail Bin Mohd Tambi1, M. Kamarul Imran


    1. LJ100® as Testosterone Booster for Managing Men with Late-onset Hypogonadism

    First International Journal of Andrologia 2011.  M. I. B. M. Tambi, M. K. Imran & R. R. Henkel


    1. Phytoandrogenic Properties of LJ100® as Natural Alternative to Testosterone Replacement Therapy

    Andrologia. Jan 2014.  George A, Henkel R


    1. Effects of LJ100® on Sexual Performance & Well-being in Men with Reduced Sexual Potency

    Published: Evidence-Based Complementary and Alternative Medicine, Volume 2014, Article ID: 179529

    Udani J, Gruenwald J, Miller M, George A, Mufiza M, Abas A,


    1. Randomized Clinical Trial on the Use of LJ100® for the Improvement of Quality of Life and Sexual Well-Being in Men

    Evidence-Based Complementary and Alternative Medicine, Volume 2012.  Shaiful Bahari Ismail, Wan Mohd Zahiruddin W Mohammad, Annie George, Nik Hazlina Nik Hussain, Zatul Mufiza Musthapa Kamal, & Eckehard Liske


    LJ100® Human Clinical Research Sport Nutrition

    1. The Ergogenic Effects of LJ100®

    British Journal of Sports Medicine (2003). BASEM Abstract 37:465-466.  Hamzah, S and Yusuf, A.


    1. Effect of LJ100® on Anabolic Balance During Endurance Exercise

    Journal of International Society of Sport Medicine 3 (1): S32 2006.  Talbott S, Talbott J, Negrete J, Jones M, Nichols M, and Roza J. 

    1. Effects of Strength Training and LJ100® Supplementation on Strength and Muscle Size in Middle-aged Women

    4th Asia-Pacific Conference on Exercise and Sport Science & 8th International Sports Science Conference (2009).  Sarina, M.Y.


    1. LJ100® as a Potential Herbal Supplement for Physically Active Male and Female Seniors

    PHYTOTHERAPY RESEARCH (2013).  Ralf R. Henkel, Ruxiang Wang, Susan Bassett, Tao Chen, Na Liu, Ying Zhu, and Mohd Ismail Tambi


    1. Supplementation of Eurycoma longifolia Jack Extract for 6 Weeks Does Not Affect Urinary Testosterone: Epitestosterone Ratio, Liver and Renal Functions in Male Recreational Athletes

    Int J Prev Med. 2014 Jun; 5(6): 728–733.  Chee Keong Chen, Wan Mohd Zahiruddin Wan Mohamad, Foong Kiew Ooi, Shaiful Bahari Ismail, Mohamad Rusli Abdullah, and Annie George


    1. Effects of Eurycoma Longifolia Jack Supplementation Combined with Resistance Training on Isokinetic Muscular Strength and Power, Anaerobic Power, and Urinary Testosterone: Epitestosterone Ratio in Young Males

    International Journal of Preventive Medicine.  2019; 10: 118.  Chee Keong Chen, Foong Kiew Ooi, Nurul Ain Abu Kasim, and Mohd Asnizam Asari


    LJ100® Human Clinical Research Cortisol, Mood, Immune

    1. Effect of LJ100® on Stress Hormones and Psychological Mood State in Moderately Stressed Subjects

    Journal of the International Society of Sports Nutrition 2013, 10:28.  Shawn M Talbott, Julie A Talbott, Annie George, Mike Pugh


    1. Immunomodulation in Middle-Aged Humans Via the Ingestion of LJ100®

    Phytotherapy Research 2016.  Annie George, Naoko Suzuki, Azreena Binti Abas, Kiminori Mohri


    1. Efficacy and safety of Eurycoma longifolia (Physta®) water extract plus multivitamins on quality of life, mood and stress: a randomized placebo-controlled and parallel study

    Food Nutr Res. 2018; 62: 10.29219/fnr.v62.1374.  Annie George, Jay Udani, Nurhayati Zainal Abidin, and Ashril Yusof


    In Vitro & In Vivo Published Research Sexual Health

    1. Phenolic-rich extracts of Eurycoma longifolia and Cylicodiscus gabunensis inhibit enzymes responsible for the development of erectile dysfunction and are antioxidants

    J Basic Clin Physiol Pharmacol. 2018 Nov 27;29(6):689-696.  Ganiyu Oboh, Adeniyi A Adebayo, Ayokunle O Ademosun


    1. Brain Cortical and Hippocampal Dopamine: A New Mechanistic Approach for Eurycoma longifolia Well-Known Aphrodisiac Activity and Its Chemical Characterization

    Evidence-Based Complementary and Alternative Medicine Volume 2019, Article ID 7543460.  Shahira M. Ezzat, Marwa I. Ezzat, Mona M. Okba, Salah M. Hassan, Amgad I. Alkorashy, Mennatallah M. Karar, Sherif H. Ahmed, and Shanaz O. Mohamed


    1. Rho-Kinase II Inhibitory Potential of Eurycoma longifolia New Isolate for the Management of Erectile Dysfunction

    Evid Based Complement Alternat Med. 2019: 4341592. Shahira M. Ezzat, Mona M. Okba, Marwa I. Ezzat, Nora M. Aborehab, and Shanaz O. Mohamed


    In Vitro & In Vivo Published Research Weight Loss

    1. Antiadipogenic effects of a standardized quassinoids-enriched fraction and eurycomanone from Eurycoma longifolia

    Phytothery Research. 2018 Jul;32(7):1332-1345.  D Balan, Kit-Lam Chan, D Murugan, Sazaly A Bakar, Pooi-Fong Wong


    1. Selection of Thai Medicinal Plants with Anti-Obesigenic Potential via in vitro method

    Pharmaceuticals 2020, 13, 56;  Wijitrapha Ruangaram 1 and Eisuke Kato


    In Vitro & In Vivo Published Research Bone Health

    1. Combined Effects of Eurycoma longifolia and Testosterone on Androgen-Deficient Osteoporosis in a Male Rat Model

    Evid Based Complement Alternat Med. 2012; 2012: 872406. Halimatun S.A Razak,  Ahmad N Shuid, and Isa N Mohamed


    1. Effects of Eurycoma longifolia on Testosterone Level and Bone Structure in an Aged Orchidectomised Rat Model

    Evidence-Based Complementary and Alternative Medicine Volume 2012, Article ID 818072.  Abdul Shukor Tajul Ariff, Ima Nirwana Soelaiman, J. Pramanik, and Ahmad Nazrun Shuid


    1. Eurycoma longifolia as a potential alternative to testosterone for the treatment of osteoporosis: Exploring time-mannered proliferative, differentiative and morphogenic modulation in osteoblasts

    J Ethnopharmacol . 2017 Jan 4;195:143-158.  Hnin Ei Thu, Isa Naina Mohamed, Zahid Hussain, Ahmad Nazrun Shuid


    1. The Effects of Quassinoid-Rich Eurycoma longifolia Extract on Bone Turnover and Histomorphometry Indices in the Androgen-Deficient Osteoporosis Rat Model

    Nutrients 2018, 10, 799;  Putri Ayu Jayusman , Isa Naina Mohamed , Ekram Alias, Norazlina Mohamed and Ahmad Nazrun Shuid


    1. An Evidence-Based Review: The Effects of Malaysian Traditional Herbs on Osteoporotic Rat Models

    Malays J Med Sci. 2018 Jul; 25(4): 6–30.  Nur Adlina Mohammad, Norfarah Izzaty Razaly, Mohd Dzulkhairi Mohd Rani, Muhammad Shamsir Mohd Aris, Nadia Mohd Effendy


    1. Exploring molecular mechanism of bone-forming capacity of Eurycoma longifolia: Evidence of enhanced expression of bone-related biomarkers

    Journal of Ayurveda and Integrative Medicine 9 (2018) 272e280.  Hnin Ei Thu, Isa Naina Mohamed, Zahid Hussain, Ahmad Nazrun Shuid


    1. Eurycoma longifolia, a promising suppressor of RANKL-induced differentiation and activation of osteoclasts: An in vitro mechanistic evaluation

    Journal of Ayurveda and Integrative Medicine 10 (2019) 102e110.  Hnin Ei Thu, Zahid Hussain, Isa Naina Mohamed, Ahmad Nazrun Shuid


    1. Effect of herbal extract Eurycoma longifolia (Physta®) on female reproductive hormones and bone biochemical markers: an ovariectomised rat model study

    BMC Complementary Medicine and Therapies (2020) 20:31.  Sasikala M. Chinnappan, Annie George, Godavarthi Ashok and Yogendra Kumar Choudhary


    In Vitro & In Vivo Published Research Inflammation

    1. Eurycomanone and Eurycomanol from Eurycoma longifolia Jack as Regulators of Signaling Pathways Involved in Proliferation, Cell Death and Inflammation

    Molecules 2014, 19, 14649-14666.  Shéhérazade Hajjouli, Sébastien Chateauvieux, Marie-Hélène Teiten, Barbora Orlikova, Marc Schumacher, Mario Dicato, Chee-Yan Choo and Marc Diederich


    1. NF-κB Inhibitors from Eurycoma longifolia

    J Nat Prod. 2014 Mar 28; 77(3): 483–488.  Thi Van Anh Tran, Clemens Malainer, Stefan Schwaiger, Atanas G. Atanasov, Elke H. Heiss, Verena M. Dirsch, and Hermann Stuppner


    1. Anti-inflammatory and analgesic effects of Eurycoma longifolia extracts

    Arch Pharm Res. 2016 Mar;39(3):421-8.  Young Min Han, Sang-Uk Woo, Min Sun Choi, Yu Na Park, Seung Hyun Kim, Hyungshin Yim, Hye Hyun Yoo


    1. Eurycomalactone Inhibits Expression of Endothelial Adhesion Molecules at a Post-Transcriptional Level

    Journal of Natural Products. 2017, 80, 3186−3193.  Clemens Malainer, Daniel Schachner, Enrico Sangiovanni, Atanas G. Atanasov, Stefan Schwaiger,

    Hermann Stuppner, Elke H. Heiss, and Verena M. Dirsch



    1. Nephroprotective Effect of Herbal Extract Eurycoma longifolia on Paracetamol-Induced Nephrotoxicity in Rats

    Evidence-Based Complementary and Alternative Medicine. Volume 2019, Article ID 4916519.  Sasikala M. Chinnappan, Annie George, Praveen Thaggikuppe, YogendraKumar Choudhary, Vandana K. Choudhary, Yesha Ramani, and Rashmi Dewangan


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