Tongkat Ali, Answered: Does It Raise Testosterone, How Long It Takes, and Is It Safe? (VigRX LJ100 Checked)

Affiliate disclosure: This article contains affiliate links. If you buy through a link on this page, we may earn a commission paid by the manufacturer, at no extra cost to you. That never changes what we publish — and here it means answering the tongkat ali questions at the level people actually search them: the ingredient, not the brand. The brand enters as the audited example — VigRX Tongkat Ali, which uses the patented LJ100 extract at the dose its trials used, and earns an Our Score of 7.5/10 in our review.

Quick Answer: Does Tongkat Ali Raise Testosterone, and How Long Does It Take?

What it is: tongkat ali — also called longjack; they are the same plant, Eurycoma longifolia — is a Southeast Asian root extract used for male sexual health and testosterone support. Does it raise testosterone? The maker's page details two LJ100 studies reporting testosterone improvements, including one where the share of men with normal testosterone rose from 35% to almost 91% over a month — ingredient-level evidence, detailed below, not a trial of the finished bottle. How long: the maker says trials ran a minimum of one month and to expect results after about a month. Price and guarantee: $59.95 for one bottle (MSRP $69.95), with a 67-day money-back guarantee.

What Is Tongkat Ali Used For — and What Is LJ100?

Tongkat ali is positioned, in the maker's framing, for men experiencing age-related decline in sexual performance: the maker claims it "can boost your testosterone and human growth hormone levels (HGH) in a natural way," linked to improved strength and athletic performance, lean muscle production and increased sex drive. Those are the maker's claims — the testosterone half has trial detail behind it on the maker's page; the HGH half, as we detail below, does not.

Not all tongkat ali extracts are the same product, which is why the extract name matters. LJ100 is a patented, standardised Eurycoma longifolia extract the maker describes as a collaboration between MIT and the Malaysian Government, patented for sexual dysfunction and male fertility. VigRX Tongkat Ali is built on it: 100 mg of LJ100 per capsule, two capsules a day — 200 mg daily. The formula's other three ingredients are vitamin B1, vitamin B6 and zinc, whose amounts the maker does not publish on its product page (its one sentence about the zinc content is garbled to the point of being unusable — a full label exists on the physical bottle; the page simply doesn't carry the numbers). The maker also states LJ100 has been "clinically-tested in 13 clinical studies," of which two are described on the product page. Treat "13" as an umbrella claim; the two detailed studies are the evidence a reader can actually weigh.

Does It Actually Increase Testosterone? The Two Studies, Weighed

Study one — the strongest design in this product's category. A 12-week, placebo-controlled study of 26 men with mild erectile dysfunction compared 200 mg of LJ100 against placebo. A placebo control at the exact dose in the bottle is the design most supplement pages cannot offer, and it is the main reason this product's evidence sub-score (8.0) is the highest among the testosterone products we review. Its limits are real too: 26 men is a small group, the study tested the ingredient rather than this four-ingredient finished product, and it was an erectile-function study — the testosterone story leans more heavily on study two.

Study two — the testosterone numbers. In a study of 76 men, the maker reports that the share of patients with normal testosterone rose from 35% to almost 91%, with serum testosterone up 47% over one month, at the same 200 mg daily dose. Those are striking figures — and the maker does not state whether this study was blinded or placebo-controlled, or who sponsored it. Reported without its design, it is a maker's report of a result, and we present it as exactly that. If your starting point is a blood result rather than a feeling, our guide to what a normal testosterone level is explains how to read one — including the much-asked question of whether a reading around 380 ng/dL is normal for a young, fit man (the honest shape of that answer: ranges are wide, symptoms and repeat morning tests matter, and it is a clinician conversation, not a supplement decision).

Can tongkat ali cure erectile dysfunction? No — and the word "cure" is where the line sits. The placebo-controlled study above was in men with mild erectile dysfunction and tested an ingredient's effect, not a cure; ED has vascular, hormonal and psychological causes that no root extract addresses as a class. Can it replace prescription testosterone therapy? No. TRT is a diagnosed, dosed, monitored medical treatment; a supplement with ingredient-level studies is a different category of thing — we compare the two directly in Testosterone Boosters vs TRT, and weigh the whole booster category in Are Testosterone Boosters Worth It?

The HGH Headline: The Claim With No Study Behind It

One part of the maker's page should be discounted entirely, and we say so in the review as well: the headline claim that this product can boost human growth hormone. Not one of the studies detailed on the maker's page measures HGH. There is no HGH data for LJ100 anywhere in the maker's material — no design, no numbers, nothing to audit. Treat that claim as marketing, not evidence, and judge the product on the testosterone and sexual-function material alone.

How Long Does Tongkat Ali Take to Work?

The maker's framing: the trials it details ran a minimum of one month, and it advises expecting results after about a month; the placebo-controlled study ran 12 weeks. So the honest planning window is one to three months — not days. The guarantee arithmetic is favourable here, for once: the 67-day guarantee comfortably covers the maker's one-month minimum trial, giving you that month plus a decision margin. Your practical decision point is around day 60: no change you can honestly describe by then means the guarantee gets used while it still exists.

Can You Take Tongkat Ali Every Day? Side Effects, Hair Loss, Liver and Kidneys

Daily use: the product is designed to be taken daily — two capsules a day is the label schedule, and the studies the maker details dosed daily for one to three months. The maker publishes no cycling guidance, so "take it daily, judge it monthly" is the whole of the documented routine.

Side effects: here the page has a genuine gap, and it matters more for a hormone-positioned product than for most. The maker publishes no safety section at all — no warnings, no exclusions, no side-effect information and no medication cautions, anywhere on its product page. That absence shapes the answers to the next three questions, which readers ask constantly:

• Can tongkat ali cause hair loss? Nothing in the maker's material addresses hair loss in either direction — no study it details measured it, and the page neither claims nor warns about it. Anyone who tells you this product is proven safe for your hairline, or proven harmful to it, is going beyond the published material.
• Does it affect the liver or kidneys? Again, the maker's pages publish nothing — no organ-safety data, no cautions, no monitoring guidance. If you have liver or kidney concerns, that silence is a reason to talk to your doctor before use, not a clearance.
• What is the negative side effect of tongkat ali? The maker's page names none — which, given that it publishes no safety section at all, means "unstated," not "none exist." The general rule for this category applies in full: stop if something feels persistently wrong, and get medical advice if it continues.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is educational and is not medical advice.

Price and the 67-Day Guarantee

VigRX Tongkat Ali costs $59.95 for one bottle (MSRP $69.95); multi-bottle prices are not displayed on the maker's product page, so a longer course cannot be priced from the page — check at checkout. The guarantee: 67 days, in the maker's standard terms — try the product and return the containers within the window for a refund if it is not for you. Buy through the Buy from Official Website button on our review page so the guarantee applies. Comparing single-ingredient against blends? The same shelf holds Testosil and TestRX, each audited the same way.

Frequently Asked Questions

How much tongkat ali did the studies use — and does the bottle match? 200 mg of LJ100 a day in both studies the maker details — and yes, unusually, the bottle matches it exactly: 100 mg per capsule, two capsules daily. That dose match is the product's strongest feature.

Does tongkat ali work inside a proprietary blend? With a blend, you cannot know the dose of any ingredient in it, which is the problem this product avoids for its hero ingredient: LJ100's amount is stated, and it is the studied amount. (The B1, B6 and zinc amounts are unpublished — the match applies to the hero, not the whole label.)

Is tongkat ali the same as longjack? Yes — two names for the same plant, Eurycoma longifolia. "LJ100" is neither: it is the name of one specific patented extract of it.

Our Verdict

VigRX Tongkat Ali scores 7.5/10 in our review — Ingredients 7.5, Evidence 8.0, Safety 7.0 and Value 7.0 on the product page's sub-scores. The honest summary: a single-herb formula whose hero ingredient is dosed at exactly the amount its two detailed trials used, one of them placebo-controlled — the strongest evidence structure in this store's testosterone aisle — let down by an HGH headline with no study behind it, three unpublished supporting amounts, and the complete absence of a safety section. Buy it, if you buy it, for the LJ100 and the dose match, judge it at the one-month mark the maker itself sets, and discount the HGH claim to zero.

Disclaimer: This article is for general information only and is not medical advice. Always consult a qualified healthcare professional before starting any supplement, especially if you have a medical condition or take prescription medication. Individual results vary, and no result is guaranteed.

Last reviewed: October 2026