• As a potent Aphrodisiac
• Increases testosterone 440%
• Increases the efficiency of the healing system
• Enhances energy level
• Improves physical and mental performances
• Increases DHEA 47%
• Tones skin and muscles
• Improves immune system
• Anti-dysentery
• Anti-malarial
• Antihistaminic (allergic-reactions)
• Anti-pyretic activity
• As an adaptogen (reduces fatigue and exhaustion)
• Improves appetite and digestion
• Anti-anxiety
• Anti-hypertensive
• Anti-viral

• Decreased sex drive
• Erectile dysfunction
• Increased depression
• Fatigue
• Inability to concentrate
• Loss of body hair
• Smaller, softer testes
• Decreased bone mass that may lead to osteoporosis
• Decreased strength and energy
• Decreased muscle
• Decreased strength of orgasm
• Increased fat

Eurycoma Longifolia is not an external source of testosterone or a precursor to testosterone. Eurycoma Longifolia incites the testes to produce more testosterone on their own by sending signals to the hypothalamus and the pituitary glands, thus stimulating your body to produce more of its own testosterone.

When testosterone levels are elevated, the sex hormones (androgens and estrogens) signal your body to decrease or stop testosterone production. Eurycoma Longifolia intercepts the negative feedback to the hypothalamus and pituitary gland, which results in the body continuing to produce testosterone at elevated levels. Because the testes are in full testosterone production mode, the penis and testicles naturally increase in size. In situations where people are taking steroids and their natural testosterone production has diminished, it can return testosterone production back to normal levels.

Studies show that Eurycoma Longifolia improves the health and wellness of sperm. There is an increase in overall sperm count, size of sperm, and motility. Initial tests in healthy lab mice showed a doubling in litter size. Concerned that this might be the result of splitting, twinning, or multiple ovulation in females, they tested for these extraneous effects. The findings were conclusive that increased fertility was purely the result of sperm quantity and quality.

Several studies conducted by researchers in Malaysia discovered that Eurycoma Longifolia contains Superoxide dimutase, a kind of anti-oxidant enzyme that has the ability to inhibit the chain reaction of free radicals harmful to the body.

Women's bodies produce testosterone, a precursor to estrogen, through the ovaries and adrenal glands. Before and after menopause, testosterone benefits to women include: improved relief of menopause symptoms, increased energy levels, enhanced feelings of well-being, decreased breast tenderness, improved sexual desire, increased sexual sensitivity, increased the frequency of coitus, enhanced orgasm, maintains muscle mass and strengthens bone.

Energy in the body is stored in the form of ATP (adenosine triphosphate). These high energy molecules are used by the body to perform energetic activities. Animal studies have shown that Eurycoma Longifolia has the ability to enhance the production of ATP through oxidative phosphorylation. For this reason, Eurycoma Longifolia can be consumed to boost the energy level, thus overcoming lethargy and fatigue. Apart from elevating the energy system, Eurycoma Longifolia is also seen to increase the individual's body metabolic rate and enhance blood circulation. These factors contribute to the heat-generating characteristic (thermogenic) of Eurycoma Longifolia.

Eurycoma Longifolia is processed in two ways, as a root powder and as a root powder extract. The root powder is very cheap and virtually useless, so what you must purchase is the root powder extract. The label must indicate that the source of the Eurycoma Longifolia is root powder extract, anything else will not do. Finally, check to see how much root powder extract is in each capsule. This can vary from 10mg to 500mg, a major difference in effectiveness and pricing. The larger the amount (mg) the more potent and also the more expensive.

1-2 capsules per day with meals. Optimal effectiveness within 1 - 3 weeks of continuous, uninterrupted use. To increase libido and sexual function, the dosage could be increased to double or triple. Bodybuilders whose concern is to achieve persistent high testosterone levels, use still higher dosages.

Weeks 1 and 2: A noticeable improvement in energy level, mental acuity and a more positive outlook on daily life.
Weeks 2 and 3: More energy, improved libido.
Weeks 3 and 4: Increase in sex drive, lucid night dreams, spontaneous erections and an increased interest in sex.
Weeks 4 and Beyond: Increased muscle and skin tone, more improvements with regard to libido, energy and mood.

University of Malaya
Research appears to confirm the power of Eurycoma Longifolia to naturally boost testosterone levels. Experiments carried out by a team of scientists at the University of Malaya showed that the water soluble extracts from Eurycoma Longifolia to have the following effects:

In vitro test on human testicular tissue demonstrated that Eurycoma Longifolia water soluble extract increased the formation of testosterone by 440%.2. In human studies, analysis of the DHEA showed gradual increase in the level from 26% after 1 week to 47% in 3 weeks.
Massachusetts Institute of Technology (MIT)
According to The New Sunday Times of Malaysia, research scientists of the Massachusetts Institute of Technology have found out that eurycoma longifolia has great potential in the treatment of some cancers, especially ovarian cancer.
MIT Researchers: Professor ChoKyun Rha, Dr. Philip Lessard, Dr. Andrea Loos, Dr. Christopher Coldren, Dr. JoonHo Choi.
Forest Research Institute of Malaysia
Researchers: Dr. Azizol Abdul Kadir Forest Research Institute Malaysia (FRIM) Dr. Ng Lean Teik Forest Research Institute Malaysia (FRIM)
Tokyo University, Japan
Department of Pharmacognosy, Tokyo College of Pharmacy & the Faculty of Medicine, Tokyo University, Japan

Kasetsart University, Thailand
Central Laboratory and Greenhouse Complex, Kasetsart University, Thailand
E. longifolia possesses high medicinal values due to the occurrence of a variety of quassinoids.

Additional Research
Jiwajinda S, Santisopasri V, Murakami A, Kawanaka M, Kawanaka H, Gasquet M, Eilas R, Balansard G, Ohigashi H. In vitro anti-tumor promoting and anti-parasitic activities of the quassinoids from Eurycoma longifolia, a medicinal plant in Southeast Asia. J Ethnopharmacol 2002 Sep 1;82(1):55
Tripetch Kanchanapoom, Phannipha Chumsri, Somsak Ruchirawat INVESTIGATION AND STRUCTURE ELUCIDATION OF ACTIVE COMPOUNDS FROM EURYCOMA LONGIFOLIA JACK ROOT. Department of Pharmacognosy, Faculty of Pharmacy, KhonKaen University, Department of Pharmacognosy, Faculty of Pharmacy and Department of Chemistry, Faculty of Science, Mahidol University
Kardono LB, Angerhofer CK, Tsauri S, Padmawinata K, Pezzuto JM, Kinghorn AD. Cytotoxic and antimalarial constituents of the roots of Eurycoma longifolia. J Nat Prod. 1991 Sep-Oct;54(5):1360-7.

Research on Aphrodisiac Properties

School of Pharmaceutical Sciences, University Science Malaysia
Pro-androgenic effects of eurycoma longifolia support the traditional use of this plant as an aphrodisiac. This study lends further support to the use of the plant by indigenous populations as a traditional medicine for its aphrodisiac property.
Key Malaysian Researchers: Ms. Aziah Mohd Yusoff (FRIM), Dr. Norwati Muhammad (FRIM), Prof. Marziah Mahmood (UPM), Dr. Kodi Isparan Kandasamy (TropBio Sdn Bhd), Dr. Jenni Harikrishna (TropBio Sdn Bhd)
Participating Malaysian Institutions: Forest Research Institute Malaysia (FRIM), University Putra Malaysia (UPM), TropBio Sdn Bhd

Additional Research
Ang HH, Cheang HS.. Effects of Eurycoma longifolia jack on laevator ani muscle in both uncastrated and testosterone-stimulated castrated intact male rats. Arch Pharm Res. 2001 Oct;24(5):437-40.

Ang HH, Ngai TH. Aphrodisiac evaluation in non-copulator male rats after chronic administration of Eurycoma longifolia Jack. Fundam Clin Pharmacol. 2001 Aug;15(4):265-8.
Ang HH, Ikeda S, Gan EK.. Evaluation of the potency activity of aphrodisiac in Eurycoma longifolia Jack. Phytother Res. 2001 Aug;15(5):435-6.
Ang HH, Cheang HS, Yusof AP. Effects of Eurycoma longifolia Jack (Tongkat Ali) on the initiation of sexual performance of inexperienced castrated male rats. Exp Anim. 2000 Jan;49(1):35-8.

Research on Cytotoxic and Antimalarial Constituents

Kardono LB, Angerhofer CK, Tsauri S, Padmawinata K, Pezzuto JM, Kinghorn AD.
Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois, Chicago 60612.
Ang HH, Chan KL, Mak JW.In vitro antimalarial activity of quassinoids from Eurycoma longifolia against Malaysian chloroquine-resistant Plasmodium falciparum isolates. Planta Med. 1995 Apr;61(2):177-8. Ang HH, Cheang HS.Studies on the anxiolytic activity of Eurycoma longifolia Jack roots in mice. Jpn J Pharmacol. 1999 Apr;79(4):497-500.Ang HH, Chan KL, Mak JW.Effect of 7-day daily replacement of culture medium containing Eurycoma longifolia Jack constituents on the Malaysian Plasmodium falciparum isolates. J Ethnopharmacol. 1995 Dec 15;49(3):171-5.Jiwajinda S, Santisopasri V, Murakami A, Kawanaka M, Kawanaka H, Gasquet M, Eilas R, Balansard G, Ohigashi H. In vitro anti-tumor promoting and anti-parasitic activities of the quassinoids from Eurycoma longifolia, a medicinal plant in Southeast Asia. J Ethnopharmacol 2002 Sep 1;82(1):55

Studies on the Anxiolytic Activity

School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang.
This study supports the medicinal use of this plant for anxiety therapy.

Is Eurycoma Longifolia safe? Yes. Eurycoma Longifolia has shown to be safe even at extremely high doses.
How long will it take to work? It is recommended to use Eurycoma Longifolia for three weeks to see results.
Can Eurycoma Longifolia help my immune system? Yes. Chemotherapy and cancer treatment have shown to damage androgen production in the body leading to immediate onset of andropause in men and women. Because hormones work in concert, damage to hormones can result in slow recovery time, overall weakness, obesity, poor mood, weak immune system, and more. Eurycoma Longifolia is rich in Super-Oxide Dismutase. This is a powerful antioxidant that can assist the body in neutralization of the affects beta particles and the maintenance of healthy cells and DNA. The better health of overall systems and hormone levels helps to deter the formation of some types of cancer.
Why don't I feel any effects? It may take up to three weeks to notice the effects of Eurycoma Longifolia . The changes may come slowly and subtle. It is important to be patient and remain aware of how you are feeling and how your body is changing. . As with any herb, the appropriate dose of Eurycoma Longifolia will vary depending on the individual. Even if you are not feeling anything,the herb is actively working in your body. This may show up more accurately when taking a serum testosterone test. Other more intangible effects that people note the effects without feeling them, is improved sexual ability, improved endurance, better mood, and alleviation of allergy symptoms.