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Tongkat ali, also known as longjack, is an herbal supplement derived from the roots of the Eurycoma longifolia plant, a flowering shrub native to Southeast Asia. It has been used in traditional medicine for various purposes, including as a remedy for diarrhea, malaria, and other conditions. Longjack is believed to increase testosterone levels, which is important for muscle mass and fat loss. While some evidence suggests that longjack may enhance athletic performance and increase muscle mass, the results of studies are mixed, and more research is needed to confirm its effectiveness.
| Characteristics | Values |
|---|---|
| Scientific name | Eurycoma longifolia |
| Common names | Tongkat Ali, Longjack, Malaysian ginseng, Ali's umbrella |
| Source | Roots of the green shrub tree Eurycoma longifolia |
| Origin | Southeast Asia |
| Traditional use | Enhance testosterone levels in men |
| Other uses | Reduce blood pressure, fever, fatigue, improve bone health, boost mood |
| Dosage | 200-400 mg daily |
| Effects | May increase muscle mass and strength, improve endurance, boost testosterone, enhance muscle tone, reduce body fat |
| Side effects | May cause DNA damage, not suitable for people with hormonal cancers, may increase testosterone levels |
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What You'll Learn
Longjack's testosterone-boosting effects
Longjack, scientifically known as Eurycoma longifolia, is a herbal supplement derived from the roots of the green shrub tree Eurycoma longifolia, native to Southeast Asia. It has been used in traditional medicine in Malaysia, Indonesia, and Vietnam. Longjack is believed to have testosterone-boosting effects, which can have a range of benefits for the human body.
Longjack is said to increase testosterone levels, which can lead to improved physical performance and increased muscle mass. This is because testosterone is important for muscle mass and fat loss. A 2014 study found that older adults who supplemented with 400 mg of Longjack extract daily experienced significantly increased muscular strength compared to a placebo group. Additionally, Longjack may help the body use energy more efficiently, reduce fatigue, and improve endurance.
The testosterone-boosting effects of Longjack are believed to be achieved through the Leutinizing Hormone (LH) pathway. Longjack may increase the production of the gonadotropins luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which elevate testosterone and sperm production in the testes. At higher doses, Longjack may also increase cholesterol transport and the production of pregnenolone, a precursor for testosterone biosynthesis.
However, it is important to note that the evidence for the testosterone-boosting effects of Longjack is mixed. While some studies have found improvements in muscle strength and cardiorespiratory fitness in men with low testosterone, other studies have found no significant differences in physical fitness between supplement takers and non-takers. Furthermore, a 2024 study found that Longjack supplementation did not improve body composition in exercise-trained males and females.
Longjack is generally considered safe, but it is always recommended to consult with a healthcare professional before taking any dietary supplement, especially for those with certain medical conditions or who are taking medications.
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Longjack's impact on athletic performance
Longjack, also known as Tongkat Ali or Eurycoma longifolia, is an herbal supplement that has been used to enhance athletic performance. It is derived from the roots of the Eurycoma longifolia tree, native to Southeast Asia, and has a long history of use in traditional medicine in countries such as Malaysia, Indonesia, and Vietnam.
Longjack is believed to positively impact athletic performance through several mechanisms. Firstly, it is known for its potential to boost testosterone levels, which is important for muscle mass and strength. By increasing testosterone, Longjack may enhance muscle growth and improve athletic performance. Additionally, Longjack contains compounds called quassinoids, including eurycomaoside, eurycolactone, and eurycomanone, which may help the body use energy more efficiently, reduce fatigue, and improve endurance. These compounds may also contribute to the reported increases in muscular strength associated with Longjack supplementation.
Research on the effectiveness of Longjack in improving athletic performance has yielded mixed results. Some studies have found that Longjack supplementation can lead to significant increases in muscular strength and power. For example, a 2014 study showed that older adults who supplemented with 400 mg of Longjack extract daily experienced increased muscular strength compared to a placebo group. Similarly, a 2020 study found that tongkat ali supplementation improved peak power output during a cycling test. Additionally, a 2021 randomized controlled trial published in Complementary Therapies in Clinical Practice found that Longjack supplementation improved muscle strength and cardiorespiratory fitness in men with low testosterone.
However, other studies have found less conclusive results. For example, a 2024 study on exercise-trained males and females did not show any improvement in body composition with 400 mg of Longjack supplementation daily. Additionally, a 2018 review of the effects of Longjack on osteoporosis in rats suggested that it may be less effective than other traditional Malaysian herbs in preventing bone loss. Furthermore, a 2023 study on rugby players found no effect on testosterone or cortisol concentration levels, muscle function, or muscle damage markers with Longjack supplementation.
While Longjack has been traditionally used to enhance athletic performance, more research is needed to fully understand its effectiveness and potential side effects. Some studies suggest that it may be beneficial for increasing muscle strength and endurance, but conflicting results indicate that the effects may depend on factors such as dosage, duration of treatment, and individual characteristics. As with any supplement, it is important to consult with a healthcare professional before taking Longjack to ensure safe and appropriate use.
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Longjack's safety and side effects
Longjack, also known as Tongkat Ali, is an herbal supplement derived from the roots of the Eurycoma longifolia tree, which is native to Southeast Asia. While it has been traditionally used to enhance athletic performance and increase muscle mass, there are potential side effects and safety concerns associated with its use.
One of the main concerns regarding Longjack is its impact on testosterone levels. Longjack is known to increase testosterone levels, which can be beneficial for improving symptoms of erectile dysfunction, male infertility, and low libido. However, excessive testosterone levels can also lead to negative side effects. Combining Longjack with other testosterone-boosting substances or medications can increase the risk of these side effects. Additionally, people with hormonal cancers, particularly prostate cancer, should exercise caution when considering Longjack due to its potential impact on testosterone levels.
Longjack is generally considered safe when taken in doses of 200 to 400 milligrams (mg) daily, with some sources recommending a maximum dose of 400 mg daily for up to 3 months. Exceeding these amounts may lead to adverse side effects, including nausea, abdominal discomfort, diarrhoea, headaches, and rash. It is worth noting that there is limited research on the long-term effects of Longjack, and the purity and concentration of extracts used in different supplements can vary.
Pregnant and breastfeeding individuals should avoid using Longjack due to a lack of sufficient safety information. Additionally, Longjack may interact with certain medications, such as those that lower blood glucose levels and propranolol, altering their effectiveness. It is always advisable to consult a healthcare professional before taking Longjack, especially for individuals with specific health conditions or those taking medications.
While Longjack has been traditionally used to enhance athletic performance and increase muscle mass, the scientific evidence supporting these benefits is limited. Some studies suggest that Longjack may improve muscle strength, particularly in older adults, but other studies have found no significant impact on body composition or athletic performance. Therefore, while Longjack may offer potential benefits, more research is needed to fully understand its effects, dosage requirements, and long-term safety profile.
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Longjack's impact on male sexual health
Longjack, scientifically known as Eurycoma longifolia, is a herbal supplement derived from the roots of the green shrub tree Eurycoma longifolia, native to Southeast Asia. It has been used in traditional medicine in Malaysia, Indonesia, and Vietnam.
Longjack is believed to have a positive impact on male sexual health. It is often promoted as a "testosterone booster", and while there is some evidence of this effect in men with low testosterone, the data is not entirely convincing. A 2014 study found that healthy men taking a supplement containing a proprietary freeze-dried water extract of Eurycoma longifolia and Polygonum minus (an antioxidant) reported enhanced sexual performance and erectile function. Additionally, a 2021 double-blind, placebo-controlled randomized trial found improvements in erectile function in older men with erectile dysfunction and low testosterone when they combined regular workouts with Longjack supplementation.
Longjack is also believed to enhance sperm production by increasing the production of the gonadotropins luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which elevate testosterone and sperm production. Furthermore, Longjack's ability to boost testosterone can help treat male infertility and improve mood. However, it is important to note that the European Food Safety Authority warned in 2021 that Longjack might cause DNA damage, and it is recommended to consult a doctor before taking this supplement.
In terms of athletic performance, Longjack has been shown to increase muscle strength and power, particularly when combined with resistance training. A 2004 study found that Longjack supplementation combined with resistance training improved peak power output during a cycling test, although it did not affect performance outcomes when taken alone. Similarly, a 2014 study found that Longjack supplementation significantly increased muscular strength in older adults compared to a placebo. However, a 2024 study did not find any improvement in body composition in exercise-trained males and females, suggesting that the effects may depend on the dose and length of treatment.
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Longjack's effect on muscle strength and power
Longjack, scientifically known as Eurycoma longifolia, is a herbal supplement derived from the roots of the green shrub tree Eurycoma longifolia, native to Southeast Asia. It has been used in traditional medicine in Malaysia, Indonesia, and Vietnam.
Longjack is believed to have a positive effect on muscle strength and power. This is due to its ability to boost testosterone levels, which is essential for muscle mass and fat loss. Research has shown that Longjack supplementation, when combined with resistance training, can increase muscular power and strength, particularly in the lower limbs. One study found that participants who underwent resistance training and consumed 200 mg of Longjack daily for 8 weeks experienced increased peak power output during a cycling test compared to those who only underwent resistance training. Additionally, a 2014 study found that 400 mg of Longjack extract daily significantly increased muscular strength in older adults compared to a placebo.
However, the effects of Longjack on muscle strength and power are not universally supported by all studies. Some research has found that Longjack supplementation alone does not affect muscular strength or endurance performance. A 2024 study on exercise-trained males and females taking 400 mg of Longjack daily did not show any improvement in body composition. Similarly, another study found that Longjack supplementation at 200 mg/day, with or without resistance training, did not provide additional benefits for muscle strength or power.
While Longjack has shown potential in enhancing muscle strength and power, particularly when combined with resistance training, more research is needed to confirm these effects. The dosage and duration of Longjack supplementation may play a crucial role in its effectiveness, and further studies are required to optimize these parameters. It is always advisable to consult with a healthcare professional before incorporating any dietary supplement into your routine, especially for those with existing health conditions or those taking medications.
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Frequently asked questions
Longjack, also known as Tongkat Ali, is an herbal supplement that has been shown to increase muscle strength and power in some studies. For example, a 2014 study found that 400 mg of Tongkat Ali extract daily significantly increased muscular strength in older adults. However, another study in 2024 found that it did not improve body composition in exercise-trained males and females. The conflicting results suggest that more research is needed to understand the effects of Longjack on muscle mass.
Longjack is believed to increase muscle mass by boosting testosterone levels and acting as an ergogenic aid. Testosterone is important for muscle mass and fat loss. Longjack contains compounds called quassinoids, which may help the body use energy more efficiently, reduce fatigue, and improve endurance.
The standard dosage of Tongkat Ali for increasing testosterone, which can indirectly lead to increased muscle mass, is 100-600 mg/day. However, for sexual health and libido, a daily dose of 200-400 mg is recommended. It is important to strictly adhere to label recommendations and consult a doctor before taking any supplements.
Longjack is generally considered safe when taken in therapeutic doses, but side effects may occur at higher doses. People with hormonal cancers should be cautious as Longjack may increase testosterone levels. Additionally, those taking medications to lower blood glucose should consult a doctor before taking Longjack as it may enhance the effects of these medications. Pregnant or nursing mothers and children should avoid this supplement.
