What Is Tongkat Ali?

- Tongkat ali roots contain antioxidant compounds.
- 200 mg daily may improve male fertility.
- Supplementation could lower stress hormones.
- Side effects include nausea and headaches.
- High doses may damage DNA and some products contain heavy metals.
- The herb is legal but regulated in the UK.
- Choose tested supplements and seek professional advice.
Tongkat Ali, or Eurycoma longifolia, is a slender tree that grows in the tropical forests of Malaysia, Indonesia and other parts of South‑East Asia. Its roots are traditionally used to brew bitter tonics believed to restore energy and vitality. In recent years the herb has gained attention in the UK for its potential effects on hormones, stress and athletic performance. The following sections explore what the science says, and what it does not yet know.

Understanding The Tongkat Ali Plant
This evergreen shrub takes years to mature and thrives in warm, humid environments. The roots contain quassinoids and flavonoids, compounds with antioxidant properties.
Traditional Names and Origins
Tongkat Ali is also called long jack, Malaysian ginseng and Ali’s umbrella. British botanist William Jack documented its use as a tonic in the early 1800s, and specimens were sent to Kew Gardens.
Tongkat Ali Benefits
Male Fertility Support
Small studies suggest 200 mg of tongkat ali daily may improve semen volume and sperm quality. Over ninety percent of older men with low testosterone achieved normal levels after a month of supplementation in one trial.
Testosterone and Libido Support
Because the herb may raise total testosterone, some users report enhanced libido and sexual performance. Results vary, and it is not a cure for erectile dysfunction.

Stress and Mood Relief
In a four‑week study involving 63 stressed adults, those taking 200 mg of extract reported less anger and tension and had lower cortisol levels.
Emotional Balance Mechanisms
Tongkat Ali’s compounds may help the body use energy more efficiently, which could indirectly improve mood. Lifestyle factors remain more important.
Athletic Performance
Quassinoids might reduce fatigue and improve energy use. A 2014 pilot study found increased strength in the elderly with 400 mg daily, but a 2024 trial showed no effect on trained athletes. Any performance boost appears modest. Good training and nutrition are still essential.
Cognitive and Mood Effects
Animal research hints that antioxidants in the root could protect brain cells, but human data is lacking. Sleeping well, staying hydrated and managing stress are more reliable ways to support cognitive function.
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Traditional Uses
In Malaysia and Indonesia the roots are brewed to treat fevers, infections and fatigue. The herb remains part of local folk medicine today. Tongkat Ali symbolises strength in Malay folklore. Elders may recommend it to younger men for vitality and vigour.
Scientific Research
Modern studies tend to be small and short‑term. Researchers have examined its effects on hormones, mood and muscle strength but agree that more rigorous trials are necessary. Most trials involve few participants and lack standardised extracts, making it hard to compare results.
Recommended Dosage
Traditional use ranges from 100 mg to 400 mg per day. Commercial capsules often provide 200-1000 mg, and studies typically use 200–400 mg.
Starting low
Begin at the lower end and consult a doctor. Higher doses have no proven extra benefits and may increase risks.

Potential Tongkat Ali Side Effects
Reported side effects include nausea, diarrhoea, headaches and rash. Rare cases of liver injury have occurred in bodybuilders, possibly due to adulterated supplements.
Long‑Term Safety
Long‑term human data is lacking. The European Food Safety Authority warns that very high doses may cause DNA damage in animals, and some products contain heavy metals.
Liver Health and Quality
People with liver disease should be cautious. Only buy from brands that publish third‑party test results to ensure purity. Certificates of analysis and transparent sourcing give greater confidence that you are consuming pure tongkat ali without adulterants.
Drug Interactions
Because the herb may raise testosterone, people with hormone‑sensitive cancers should avoid it. It might also enhance blood‑glucose‑lowering drugs.

UK Market and Popularity
Tongkat Ali has become popular in Britain, especially among athletes. Runners and gym‑goers take it to reduce muscle fatigue and boost stamina, but quality varies widely.
Is Tongkat Ali Banned in the UK?
Tongkat ali is not on the UK list of banned herbal ingredients. Officials have acted only against specific brands that were contaminated or made unsubstantiated claims.
Choosing a Supplement
Look for labels showing extraction ratios and percentages of active compounds. High‑quality products may also include adaptogens like ginseng or maca for broader support.
Blends and Balance
Combining Tongkat ali with other herbs can yield a more balanced supplement. Stronglife’s Tongkat Ali, Ginseng & Maca Root blend is a good example.
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Adaptogens Compared
Ashwagandha, Maca and Korean ginseng are other adaptogens. They differ in active constituents and research backing. Ashwagandha is known for stress reduction, maca for energy and libido, and ginseng for cognitive and immune support.
Personal choice
Your selection depends on your goals: stress relief, hormonal support or general vitality. Read labels and consider combining herbs for a comprehensive approach.
When To Expect Results
Many people report subtle effects after 3-12 weeks. Lifestyle factors like sleep, diet and exercise strongly influence outcomes.
Our articles on when to take tongkat ali and how long does tongkat ali take to work provides guidance on timing your dose.
Patience pays
Consistency is key. Do not increase the dose if results are not immediate. Another Stronglife guide explains how long the herb takes to work and offers practical tips.

Closing Thoughts
Tongkat ali may support male fertility, stress management and energy, yet research is still emerging. Choose reputable products, start with modest doses and consult a healthcare professional if you have health conditions.
Final Recommendation
For a balanced approach consider Stronglife’s Tongkat Ali Capsules or Tongkat Ali, Ginseng & Maca Root blend. As with any supplement, moderation and medical advice are essential.
Comparison of popular adaptogenic herbs
| Herb | Notable compounds | Potential benefits |
|---|---|---|
| Tongkat Ali | Quassinoids, flavonoids | May support testosterone, fertility and stress resilience |
| Ashwagandha | Withanolides | Traditionally used for stress reduction and sleep support |
| Maca Root | Macamides, macaenes | Often taken to boost energy, mood and libido |
| Korean Ginseng | Ginsenosides | May enhance cognitive function and immune response |





