Leuzea - or maral root - is a legendary herb from the old Soviet school of sports science, wrapped in stories of strength and endurance. But what does the science actually show today, what has been proven in humans, and what remains at the level of tradition and animal studies? Let's take a calm, honest look at the benefits, the active compounds and what to realistically expect.
Does this sound familiar?
- You're looking for a natural adaptogen for tone, endurance and recovery
- You've heard of leuzea and ecdysterone, but you're not sure whether they really work
- You want to separate the real data from the legends
What leuzea is and where its strength lies
Leuzea (Rhaponticum carthamoides), also known as maral root, is a mountain plant from Siberia and the Altai. It's the root that's used, and its characteristic active compounds are ecdysteroids - above all ecdysterone (20-hydroxyecdysone) - together with flavonoids. A scientific review describes its rich composition and its traditional reputation as an adaptogen for physical performance (Kokoska and Janovska, Phytochemistry, 2009).
The first honest starting point: leuzea is a traditional adaptogen with intriguing chemistry, but most of the data on it comes from animal studies and older sources rather than modern human trials.
Ecdysterone and muscle: the one strong human study
Here there's one genuinely interesting human trial. A randomised study in resistance-trained men over 10 weeks reported a greater increase in muscle mass and strength with ecdysterone compared with controls, with no signs of liver or kidney harm (Isenmann and colleagues, Archives of Toxicology, 2019). That sounds promising - but there are important caveats.
First, this is ONE study and the results need confirmation. Second, and tellingly: the authors themselves recommended that ecdysterone be added to WADA's (the World Anti-Doping Agency's) list of prohibited substances - in other words, the effect was real enough to raise a regulatory question. So if you compete, caution is warranted.
💡 Did you know that...
- Leuzea grows high in the mountains of Siberia and the Altai.
- Its main active compound, ecdysterone, is similar to an insect hormone.
- Ecdysterone does NOT act like anabolic steroids - it doesn't bind to steroid receptors in the same way.
- Much of its "strength" reputation comes from Soviet sports medicine.
Why we should be cautious: hype versus evidence
Here we need to be honest. A review of phytoecdysteroids notes that the muscle-growth claim is "one of the most cited on the internet", but that more rigorous research is needed, because the full cellular explanation is still missing (Báthori and colleagues, Current Medicinal Chemistry, 2008). In other words: the mechanism is interesting and the animal data are promising, but the human evidence is thin.
The same applies to adaptogens in general. One review emphasises that although the mechanisms are well described in cell and animal models, solid human clinical trials are limited (Panossian and Wikman, Pharmaceuticals, 2010). So we approach leuzea with interest, but also with realism.
Leuzea is a traditional adaptogen with intriguing chemistry. There's one promising human study on ecdysterone, but most of the data are from animals - so expectations should be realistic, not legendary.
Who it makes sense for
Honestly summed up: leuzea is traditionally taken as adaptogenic support for tone, physical performance and recovery, especially during demanding periods. But don't see it as a substitute for training and nutrition, nor as a guaranteed "natural steroid". If you're a competitive athlete, bear in mind the regulatory status of ecdysterone. For everyone else - take it with realistic expectations.
New research (2025): why standardisation is decisive
In 2025 a new, sobering trial appeared. In 28 resistance-trained men over 12 weeks, a commercial ecdysterone product showed no additional benefit compared with placebo. And more tellingly: laboratory analysis found that the capsules contained less than 1% of the stated amount of 20-hydroxyecdysone (Dissemond and colleagues, Journal of the International Society of Sports Nutrition, 2025).
The takeaway isn't that ecdysterone "doesn't work", but something more practical: in this category, product quality and standardisation are decisive. Leuzea (Rhaponticum carthamoides) is among the richest natural sources of ecdysteroids (Głazowska and colleagues, 2018) - but only if the extract is genuine and well standardised. That's why choosing a trusted manufacturer matters as much as the herb itself.
Dosage: how much, when and for how long
Leuzea has no single "official" dose, so the leading rule is the dosage of the specific product. A few practical pointers:
- When: in the first half of the day - because of its stimulating effect it can interfere with sleep in the evening.
- How much: follow the dose on the packaging; with a standardised extract the amount of ecdysteroids is clearly stated (unlike the non-standardised products mentioned above).
- How long: give it several weeks - usually a course of 4-8 weeks, followed by a break, as with most adaptogens.
- In sport: bear in mind that ecdysterone is on WADA's monitoring programme - it's watched, but not currently banned.
Leuzea is rarely taken on its own: the combination with tribulus and zinc
In practice, leuzea is rarely taken on its own. The classic combination pairs it with tribulus and zinc - a formula known as TLZ (Tribulus, Leuzea, Zinc). The idea is that each ingredient complements the others.
Honestly about each of them: leuzea is a traditional adaptogen for tone and recovery; tribulus has a long tradition in male vitality; and zinc carries a scientifically confirmed, authorised claim - it contributes to the maintenance of normal testosterone levels in the blood. Zinc is the "solid anchor" in this trio, while leuzea and tribulus add the traditional adaptogenic support.
Leuzea in combination - from our range:
- TLZ - Tribulus and Leuzea, liquid extract - a liquid form with leuzea itself in combination with tribulus.
- TLZ - Tribulus, Leuzea and Zinc - the full trio in tablets, with zinc for normal testosterone.
- Tribulus Max - for those who want to add a higher dose of tribulus to their routine.
Who are we to write about this
Cvetita Herbal has worked for over 10 years with its own production and more than a million satisfied customers. That's precisely why we'd rather tell you that the human evidence for leuzea is thin and that it's no miracle, instead of selling you the legend. The informed choice is the better choice.
Leuzea Max Tablets
Our Leuzea Max comes in a convenient tablet form with clear dosing. It's suitable as traditional adaptogenic support for tone and physical performance during demanding periods - with realistic expectations, and as part of a balanced routine with exercise and good nutrition.
💡 How to use it: Take it according to the dosage on the packaging, preferably in the first half of the day because of its stimulating effect. Give it several weeks. If you're a competitive athlete, bear in mind the status of ecdysterone. If you have any medical conditions or are taking medication, consult your doctor.
What to realistically expect
For tone: traditional adaptogenic support for physical performance - with realistic expectations.
For muscle: one promising human study on ecdysterone - but it needs confirmation.
For the evidence: most of the data are from animals - approach it with interest, but also with realism.
What customers share
"I take leuzea during demanding periods for tone. I like it as traditional support, with realistic expectations."
- Kiril M.
"The tablet form is convenient and has a clear dose. I take it in the morning as part of my routine."
- Anna G.
Where leuzea fits in a complete routine
Leuzea is the adaptogenic part of a man's routine - tone and coping with demands. In the TLZ Protocol 50 it's in the core formula, together with tribulus and zinc; zinc contributes to the maintenance of normal testosterone levels in the blood.
See the TLZ Protocol 50Frequently asked questions
Does leuzea build muscle?
Its active compound ecdysterone has one promising human study on muscle mass and strength, but it needs confirmation. Most of the data are from animals. Don't treat it as a guaranteed muscle builder.
Is ecdysterone a steroid?
No. Ecdysterone is a plant ecdysteroid, similar to an insect hormone, and it doesn't act like anabolic steroids. Even so, if you compete, bear in mind its regulatory status.
Does leuzea work as an adaptogen?
It's traditionally taken as one, and the mechanisms are described in cell and animal models. But solid human clinical data for adaptogens in general are limited - so keep your expectations realistic.
Is leuzea safe?
In the available data it's well tolerated. Because of its stimulating effect, don't take it in the evening. If you have any medical conditions, high blood pressure, are taking medication, or are pregnant or breastfeeding, consult your doctor.
If you're looking for traditional adaptogenic support for tone and physical performance, with a clear head about what is and isn't proven, leuzea is a sensible choice - with realistic expectations, and as part of a balanced routine.
GET LEUZEASources
- Isenmann E et al. Ecdysteroids as non-conventional anabolic agent: performance enhancement by ecdysterone supplementation in humans. Arch Toxicol, 2019. pubmed.ncbi.nlm.nih.gov/31123801
- Dissemond J et al. How reliable is the labeling of a commercial phytosteroid product? A 12-week randomized double-blind training study. J Int Soc Sports Nutr, 2025. pubmed.ncbi.nlm.nih.gov/40781783
- Głazowska J et al. Chromatographic separation, determination and identification of ecdysteroids: Focus on Maral root (Rhaponticum carthamoides, Leuzea carthamoides). J Sep Sci, 2018. pubmed.ncbi.nlm.nih.gov/30303602
- Kokoska L, Janovska D. Chemistry and pharmacology of Rhaponticum carthamoides: a review. Phytochemistry, 2009. pubmed.ncbi.nlm.nih.gov/19457517
- Báthori M et al. Phytoecdysteroids and anabolic-androgenic steroids - structure and effects on humans. Curr Med Chem, 2008. pubmed.ncbi.nlm.nih.gov/18220764
- Panossian A, Wikman G. Effects of adaptogens on the central nervous system and the molecular mechanisms associated with their stress-protective activity. Pharmaceuticals (Basel), 2010. pubmed.ncbi.nlm.nih.gov/27713248
Food supplement. It does not replace a varied diet and a healthy lifestyle. It is not a medicine and does not treat disease. The active compound ecdysterone is subject to anti-doping scrutiny - if you compete, seek advice. If you have any medical conditions, high blood pressure, are taking medication, or are pregnant or breastfeeding, consult your doctor before use. This information is for educational purposes and does not constitute medical advice.