Tongkat Ali (Eurycoma longifolia)

Q: What is Tongkat Ali and where does it come from?

Tongkat Ali, scientifically known as Eurycoma longifolia , is a flowering shrub-tree originating from Southeast Asia. It is also commonly referred to as Longjack or Ali's walking stick. Traditionally, it has been used for various purposes, including improving sexual performance, boosting energy, and even as a remedy for fevers and malaria.

The Legendary Longjack for Testosterone and Libido

Table of Contents

Introduction
Mechanisms of Action
Evidence-Based Benefits
Side Effects and Risks
Synergies and Interactions
Anecdotal and Lesser-Discussed Effects
Sources
Where to buy?

Introduction

Tongkat Ali, also known as Longjack or its scientific name Eurycoma longifolia, is a flowering shrub-tree native to Southeast Asia that has earned a global reputation as a natural aphrodisiac and testosterone booster. In Malaysia and Indonesia, it’s considered a national treasure for male virility – traditionally used to improve sexual performance, energy, and even as a remedy for fevers or malaria. The nickname “Ali’s walking stick” (from the shape of its root) hints at its long-standing use for male potency.

Over the past decade, this powerful herb has surged in popularity in the West, thanks in part to fitness and biohacking experts who tout its ability to support healthy testosterone levels, muscle growth, mood, and libido. A lot of this enthusiasm comes from emerging scientific studies that provide a rationale for the traditional claims.

Ai generated image of Eurycoma longifolia Tongkat Ali — Ai generated image of Eurycoma longifolia

In this section, we will explore how Longjack works, what the research says about its benefits, considerations regarding side effects, how it pairs with other supplements, and some of the more colorful anecdotes associated with its use (including that buzzworthy idea that it might increase penis size temporarily – we’ll talk about that!).

Mechanisms of Action

Tongkat Ali’s effects center largely on the hormonal (endocrine) system and possibly the stress axis. Its bioactive constituents include quassinoids like eurycomanone, eurycomanol, and eurycomalactone, as well as various alkaloids. These compounds give tongkat ali a few proposed mechanisms:

Increasing Free Testosterone: One of the widely cited mechanisms is tongkat ali’s potential to increase the bioavailable (free) testosterone by lowering Sex Hormone-Binding Globulin (SHBG). SHBG is a protein that binds tightly to testosterone, rendering it inactive. By reducing SHBG levels or binding activity, tongkat ali may “free” more testosterone in circulation, which could then exert effects on libido, muscle, etc.
Stimulating the HPG Axis (LH and Testosterone Production): Tongkat Ali is often said to work like a mild gonadotropin-releasing agent. Some rodent studies showed tongkat ali extract increased luteinizing hormone (LH), which in turn stimulates the testes to produce more testosterone.
Adrenal and Cortisol Modulation: Emerging research suggests tongkat ali might also interact with the hypothalamic-pituitary-adrenal (HPA) axis, thereby influencing stress hormones. In a study on moderately stressed adults, tongkat ali supplementation led to a significant decrease in cortisol levels and an increase in self-reported mood (less anger and tension).
Aphrodisiac and Nitric Oxide Effects: Beyond testosterone, tongkat ali is famed for directly improving sexual function. It likely increases libido and erectile quality through some neurochemical and blood flow effects. Research indicates it can elevate dopamine levels and has pro-erectile effects in animal models. It also may boost nitric oxide production in penile tissue, aiding vasodilation (similar to how tribulus works).
Other Mechanisms: Tongkat Ali has a few more tricks. It has antioxidant properties, which help protect organs (like the testes) from oxidative stress. It may also exert anti-estrogenic effects by inhibiting aromatase enzyme (thus preventing too much testosterone from converting to estrogen).

Evidence-Based Benefits

There has been a surge in tongkat ali research in recent years, and while more is always welcome, current evidence supports many of the traditional claims:

Increased Testosterone: Several clinical trials have demonstrated tongkat ali’s ability to raise testosterone levels. A 2021 systematic review and meta-analysis of clinical trials concluded that Eurycoma longifolia supplementation significantly improves total testosterone in men, particularly those with lower baseline levels or mild hypogonadism.
Enhanced Libido and Sexual Function: Tongkat Ali’s impact on sexual health is well documented in both research and user reports. A randomized controlled trial in men with mild erectile dysfunction found that tongkat ali supplementation significantly improved scores on the International Index of Erectile Function (IIEF) – specifically enhancing erectile rigidity, intercourse satisfaction, and sexual desire.

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Muscle Strength, Body Composition, and Athletic Performance: Tongkat Ali is popular among athletes and bodybuilders as a natural aid. Studies indicate modest benefits for muscle and strength gains, especially when combined with training.
Stress Reduction and Mood Improvement: Tongkat Ali has displayed adaptogenic qualities. A placebo-controlled study found that tongkat ali (200 mg/day) given to subjects under moderate stress decreased salivary cortisol by 16% and increased testosterone by 37%, accompanied by improvements in mood states like tension and anger.
Other Notable Benefits: Tongkat Ali has been studied for bone health, blood sugar modulation, and even antimicrobial properties. It is also being studied to counteract metabolic side effects of androgen deprivation therapy in prostate cancer patients.

Side Effects and Risks

Tongkat Ali is generally well-tolerated, but there are some considerations:

Stimulatory Effects and Insomnia: Tongkat Ali can have a mild stimulant-like effect for some individuals. It’s often recommended to take tongkat ali in the morning or at least by early afternoon to avoid sleep disruption.
Irritability or Anxiety: Because tongkat ali increases adrenergic drive (through raising testosterone and dopamine), a small percentage of users report feeling irritable, edgy, or anxious on it.
Headache and Dizziness: Some users experience mild headaches, dizziness, or light nausea when starting tongkat ali. It could be related to changes in blood pressure or blood sugar.
Hormone-Related Effects: In men, an increase in testosterone is usually welcome, but if levels were to go very high, one could see side effects like acne, increased body hair, or breast tenderness. In women, caution is advised.
Interactions and Contraindications: Tongkat Ali might interact with certain medications or conditions. Those on insulin or hypoglycemic drugs should monitor levels closely. It might also interact with drugs that affect hormone levels.

Synergies and Interactions

Tongkat Ali is frequently combined with other supplements in pursuit of a comprehensive vitality or performance stack. Here are some common synergies:

Tongkat Ali + Fadogia Agrestis
Tongkat Ali + Shilajit
Tongkat Ali + Ashwagandha
Tongkat Ali + Tribulus Terrestris

Anecdotal and Lesser-Discussed Effects

Some anecdotes verge on urban legend – here we address a few:

Temporary Increase in Penis Size: While tongkat ali doesn’t cause actual tissue growth, its effects on erectile function can lead to the appearance of a fuller flaccid hang or more engorged erections.
“Alpha” Feeling and Confidence: Many users of tongkat ali describe a noticeable change in their mindset – often dubbed the “alpha wolf” feeling. Increased confidence, assertiveness, and mental clarity are common.
Fertility Boost: Tongkat ali can improve male fertility parameters, including sperm concentration and motility.
Cycle or Continuous Use?: Some recommend cycling tongkat ali to prevent the body from adapting. Anecdotally, cycling might maintain the supplement’s effectiveness.
Women Using Tongkat Ali: Though not mainstream for women, those with low androgen levels might benefit from tongkat ali to help rebalance their hormones.
Taste and Quality Anecdotes: Genuine tongkat ali extract is extremely bitter. This bitterness is often seen as a sign of quality, and users should expect it.

Sources

Where to buy Tongkat Ali

Known as Eurycoma longifolia (scientific name)

Longjack, Ali’s Walking Stick, Malaysian Ginseng, Asian Aphrodisiac Herb, Testosterone-boosting Herb, Southeast Asian Herb, Eurycomanone-rich herb (referring to the active compound), Natural Testosterone Booster, Libido-enhancing plant, Herbal testosterone supplement, Testosterone-boosting plant, Herbal aphrodisiac

What is Tongkat Ali and where does it come from?

Tongkat Ali, scientifically known as Eurycoma longifolia, is a flowering shrub-tree originating from Southeast Asia. It is also commonly referred to as Longjack or Ali’s walking stick. Traditionally, it has been used for various purposes, including improving sexual performance, boosting energy, and even as a remedy for fevers and malaria.

How is Tongkat Ali thought to work in the body?

Tongkat Ali’s effects are primarily linked to its interaction with the hormonal system and potentially the stress axis. Its active compounds, such as quassinoids and alkaloids, are believed to work by increasing free testosterone (by lowering Sex Hormone-Binding Globulin), stimulating testosterone production via the HPG axis, modulating stress hormones like cortisol, and enhancing sexual function through neurochemical and blood flow effects, potentially involving dopamine and nitric oxide. It may also possess antioxidant and anti-estrogenic properties.

What are the main research-backed benefits of Tongkat Ali?

Several clinical trials and a systematic review have supported Tongkat Ali’s traditional uses. Evidence suggests it can increase testosterone levels, particularly in men with lower baseline levels, and enhance libido and sexual function. Studies have also indicated modest benefits for muscle strength, body composition, and athletic performance, especially when combined with training. Furthermore, research suggests it has adaptogenic qualities, helping to reduce stress and improve mood.

Can Tongkat Ali help with stress and mood?

Yes, emerging research indicates that Tongkat Ali can interact with the hypothalamic-pituitary-adrenal (HPA) axis, which influences stress hormones. Studies have shown that supplementation can lead to a decrease in cortisol levels and an improvement in self-reported mood states, such as reduced anger and tension, suggesting it has adaptogenic properties.

Are there any potential side effects or risks associated with Tongkat Ali?

While generally well-tolerated, some individuals may experience side effects. These can include mild stimulant-like effects leading to insomnia (often recommending morning dosage), irritability or anxiety, and occasional headaches, dizziness, or nausea. Due to its potential to increase testosterone, men could potentially experience hormone-related side effects if levels become excessively high, and caution is advised for women. Tongkat Ali might also interact with certain medications, particularly those affecting blood sugar or hormone levels.

What are some common supplements that Tongkat Ali is combined with?

Tongkat Ali is often stacked with other supplements to enhance overall vitality and performance. Some common combinations mentioned include Tongkat Ali with Fadogia Agrestis, Shilajit, Ashwagandha, and Tribulus Terrestris.

Are there any anecdotal effects of Tongkat Ali that are not fully backed by research?

Yes, beyond the evidence-based benefits, there are anecdotal reports and lesser-discussed effects. These include the potential for a temporary increase in penis size (attributed to improved erectile function rather than tissue growth), experiencing an enhanced sense of confidence or an “alpha” feeling, and improvements in male fertility parameters like sperm concentration and motility. Some users also suggest cycling Tongkat Ali to maintain effectiveness, and the intense bitterness of genuine extract is often considered a sign of quality.

Can women use Tongkat Ali?

While not as commonly used by women as men, the source mentions that women with low androgen levels might potentially benefit from Tongkat Ali to help rebalance their hormones. However, caution is generally advised for women due to its potential to increase testosterone.