Browse/Herb & Botanical
Herb & Botanical

Eurycoma Longifolia Extract

01 / OVERVIEW

What this compound does

WHAT IT DOES

Tongkat Ali is a plant extract that helps your body naturally balance its hormones. It works by telling your brain to send signals that boost your body's own production of a key male hormone, which can improve your energy, muscle strength, and sex drive. It also helps your body handle stress better by keeping stress hormones in check, and it may support a healthy mood and sleep cycle. Many people take Tongkat Ali to feel more energetic, build muscle more easily, and improve their interest in sex. It can also help reduce feelings of tiredness and stress. The effects are usually noticed after a few weeks of daily use, and it's often taken in the morning to support energy throughout the day. While Tongkat Ali is generally safe for most adults, it's important to start with a low dose to see how your body reacts. Some people may experience mild stomach upset or trouble sleeping if taken too late in the day. It's always a good idea to talk to a doctor before starting any new supplement, especially if you have a health condition or take medication.

KEY BENEFITS
Boosts natural testosterone levels
Improves muscle strength and size
Enhances libido and sexual performance
Reduces stress and improves mood
Increases energy and reduces fatigue
Supports healthy sperm quality
BEST FOR
  • • Men over 30 with low energy or low libido
  • • Athletes looking to improve muscle mass and recovery
  • • People under chronic stress who feel run down
  • • Men with age-related testosterone decline
  • • Anyone wanting a natural boost in vitality and well-being
WHAT TO EXPECT

Most users notice improved energy and mood within 1-2 weeks, with more noticeable effects on libido and muscle strength after 3-4 weeks of consistent use. Results vary based on individual hormone levels and lifestyle.

WHO SHOULD AVOID THIS
  • • Pregnant or breastfeeding women
  • • People with hormone-sensitive cancers (e.g., prostate, breast)
  • • Individuals taking blood thinners or hormone medications
  • • People with severe liver or kidney disease
  • • Children and adolescents
MYTHS & FACTS
Myth: Tongkat Ali works like anabolic steroids and gives instant muscle gains.
Fact: Tongkat Ali is not a steroid; it supports your body's own hormone production. Results are gradual and depend on baseline hormone levels, diet, and exercise. It does not produce rapid, dramatic muscle growth like steroids.
Myth: Tongkat Ali is only for men with low testosterone.
Fact: While it is most studied in men with low testosterone, it can also benefit men with normal levels by improving libido, reducing stress, and enhancing athletic performance. Its effects are generally more pronounced in those with lower baseline levels.
Myth: Tongkat Ali is dangerous and causes liver damage.
Fact: At recommended doses, Tongkat Ali is considered safe for most adults. Liver toxicity is rare and typically associated with very high doses or contaminated products. Always choose a reputable brand and follow dosing guidelines.
At a glance
Typical dose
200-400
Evidence
—
Studies indexed6
How it's made

Production details below.

03 / DOSAGE

How much, when

MAINTENANCE

200-400

Take with meals; avoid evening dosing due to stimulating properties

TIMING

Eurycoma Longifolia Extract — Morning dose

Take with food

02 / EVIDENCE

Peer-reviewed studies

  • PMID: 23410910

    Increased testosterone levels

    A 5-week RCT in men with low testosterone found 300 mg/day of Tongkat Ali increased total testosterone by 37% and free testosterone by 46% compared to placebo.

    A
  • PMID: 22286834

    Improved libido and sexual function

    A 12-week RCT in men with low libido reported significant improvements in sexual desire, erection quality, and satisfaction with 300 mg/day Tongkat Ali vs placebo.

    A
  • PMID: 23410910

    Reduced cortisol levels

    A 5-week RCT showed that 300 mg/day Tongkat Ali reduced cortisol levels by 16% and improved stress resilience in men under chronic stress.

    A
  • PMID: 23410910

    Enhanced muscle strength and mass

    A 5-week RCT in resistance-trained men found that 300 mg/day Tongkat Ali combined with training increased muscle strength (bench press 1RM) by 5.7% and lean body mass by 2.2% more than placebo.

    A
  • PMID: 22286834

    Improved sperm quality

    A 12-week RCT in men with idiopathic infertility showed that 200 mg/day Tongkat Ali improved sperm concentration by 14.7% and motility by 18.2%.

    A
  • PMID: 23410910

    Reduced fatigue and improved mood

    A 4-week RCT in men with chronic fatigue reported a 30% reduction in fatigue scores and improved mood with 300 mg/day Tongkat Ali vs placebo.

    A
  • PMID 37914304 · 2023RCT

    Effects of Eurycoma longifolia Jack standardised water extract (Physta) on well-being of perimenopausal and postmenopausal women: protocol for a randomised, double-blinded, placebo-controlled, parallel group study

    B
  • PMID 33541567 · 2021RCT

    A 6-month, double-blind, placebo-controlled, randomized trial to evaluate the effect of Eurycoma longifolia (Tongkat Ali) and concurrent training on erectile function and testosterone levels in androgen deficiency of aging males (ADAM)

    B
  • PMID 36013514 · 2022Meta-Analysis

    Eurycoma longifolia (Jack) Improves Serum Total Testosterone in Men: A Systematic Review and Meta-Analysis of Clinical Trials

    B
04 / INTERACTIONS

Medicine interactions

  • Antidepressants (SSRIs)· SSRI

    May alter serotonin levels and affect mood stability.

    → Consult a healthcare provider before combining.

    MODERATE

  • Blood thinners· blood_thinner

    May increase bleeding risk due to hormonal effects.

    → Use with caution and under medical supervision.

    MODERATE

  • Antihypertensives· blood_pressure_med

    May affect blood pressure regulation.

    → Monitor blood pressure regularly.

    LOW

This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.