Tongkat Ali (Eurycoma longifolia): Everything You Need to Know

What is Tongkat Ali?

Tongkat ali goes by a couple of other names. Its scientific name is Eurycoma Longifolia. It is also known as longjack in some countries.

But basically, tongkat ali is a herb that is harvested from a flowering plant. It grows in various regions of Asia which is why it is predominantly used in the medicinal practices of those areas.

For instance, many Southeast Asian countries use tongkat ali to address low libido, sexual dysfunction, low testosterone levels, poor fertility in men, poor blood flow, cognitive issues, and more.

It’s important to understand the risks and benefits of tongkat ali if you are considering using it in any capacity. That’s because, while there are many tongkat ali benefits, it may also cause side effects and interactions for some users.

Health Benefits of Tongkat Ali

1. May Enhance Testosterone Levels and Male Fertility

Tongkat Ali has been investigated for its effects on testosterone levels and male fertility. A systematic review and meta-analysis of randomized clinical trials published in Medicina indicated that supplementation with E. longifolia may lead to a significant increase in total testosterone levels in men, particularly in those with hypogonadism. This suggests a potential role for E. longifolia in enhancing testosterone production.

Additionally, a clinical study reported by AIP Publishing found that older men supplemented with E. longifolia root extract experienced increased testosterone levels and strength, alongside reduced symptoms of aging and fatigue.

2. May Improve Stress Hormone Profiles and Mood

Research has shown that Tongkat Ali supplementation can positively affect stress hormones and mood. A study published in Journal of the International Society of Sports Nutrition involving moderately stressed individuals found that daily supplementation with 200 mg of Tongkat Ali for four weeks resulted in a 16% reduction in cortisol levels and a 37% increase in testosterone levels. Participants also reported improvements in mood, including reduced tension, anger, and confusion.

3. May Support Sleep Quality

Preliminary studies suggest that Tongkat Ali may have a role in improving sleep quality. Clinical and preclinical studies from Oxford Academic have indicated that Tongkat Ali extract may enhance vigor and vitality, potentially contributing to better sleep patterns.

4. May Assist in Managing Diabetes

Initial research indicates that Tongkat Ali may aid in managing diabetes. In animal studies, Tongkat Ali root improved insulin secretion and helped regulate high blood sugar levels. However, further research in humans is necessary to confirm these findings.

Benefits Tongkat Ali

Safety and Side Effects

Tongkat Ali shows safety in small doses during brief usage periods. People taking tongkat ali report only stomach discomfort and skin itching as side effects. Scientists have not yet fully determined its complete safety profile.

Research attention toward E. longifolia safety began mainly in the late 1990s, according to a 2023 overview from Journal of Public Health in Africa. Animal studies revealed possible toxicity risks at higher concentration levels.

The European Food Safety Authority Panel reported in 2021 that high doses of water-extracted tongkat ali powder may damage DNA in stomach and small intestine tissues.

This DNA damage potential led the panel to conclude that no current usage conditions can guarantee safety for tongkat ali supplements.

Human studies provide limited information about adverse effects. A toxicology review from Molecules in 2016 found mice experienced no liver or kidney changes when given oral tongkat ali doses of 200-300 mg/kg body weight.

This research determined the fatal oral dose for mice ranges from 1,500 to 2,000 mg/kg for alcohol-extracted tongkat ali, while water-extracted versions exceed 3,000 mg/kg.

A study conducted in Food and Chemical Toxicology 2006 examining tongkat ali supplements found concerning mercury levels. Twenty-six percent contained mercury exceeding recommended safety limits.

Recommended Dosage

Too much of a good thing can always be dangerous whether you are talking about a herbal supplement or a beneficial medication. Tongkat ali is no different. You should always stay within the recommended dosage for tongkat ali and other supplements.

Most health experts suggest that you not exceed 200 milligrams per day of tongkat ali. This dosage is enough to experience most of the health benefits of the herb without causing its known side effects.

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How to Use Tongkat Ali?

• Form: Tongkat Ali is available in various forms, including capsules, tablets, and powders. Standardized extracts, particularly those rich in bioactive compounds like eurycomanone, are recommended for consistent potency.
• Timing: While specific timing hasn't been universally established, taking Tongkat Ali in the morning with food may be beneficial to minimize potential gastrointestinal discomfort.​
• Duration: Effects may become noticeable after several weeks of consistent use. Long-term use should be monitored by a healthcare professional.​

Should You Take Tongkat Ali?

Tongkat Ali (Eurycoma longifolia), a traditional Southeast Asian herb, has garnered attention for its potential benefits in enhancing testosterone levels, improving male fertility, and reducing stress. However, it's essential to consider the available scientific evidence and consult healthcare professionals before incorporating it into your regimen.​

1. Testosterone Enhancement

Several clinical studies have investigated the effects of Tongkat Ali on testosterone levels:​

• 200 mg Daily for 1 Month: A study from PubMed Central involving 76 older men with low testosterone levels found that daily supplementation with 200 mg of Tongkat Ali extract significantly increased testosterone levels to normal values in over 90% of participants.
• 200 mg Daily for 6 Months: Research on 45 men with androgen deficiency showed that taking 200 mg of Tongkat Ali daily, combined with training, increased overall testosterone levels. ​
• 400 mg Daily for 5 Weeks: A 2014 study from Phytotherapy Research on 25 older adults (57–72 years) reported significant increases in total and free testosterone levels, along with improved muscle strength and force.

2. Male Fertility

Tongkat Ali may have a positive impact on male fertility:​

• 200 mg Daily for 3 Months: A study involving 75 male partners of couples with infertility found that supplementation with 200 mg of Tongkat Ali extract per day significantly improved sperm concentration and motility after 3 months.
• 300 mg Daily: Another study indicated that a higher dose of 300 mg daily resulted in a 44% increase in sperm motility compared to 200 mg daily.

3. Stress Reduction and Mood Improvement

Tongkat Ali may help in reducing stress and improving mood:

• 200 mg Daily for 4 Weeks: A study from Journal of the International Society of Sports Nutrition on 63 adults with moderate stress found that supplementation with 200 mg of Tongkat Ali extract per day reduced cortisol levels by 16% and improved mood parameters, including reduced tension, anger, and confusion.