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What Is Turkesterone, and Should You Care?
Turkesterone has been popping up everywhere lately. For a while now, it’s felt like almost every fitness influencer has been talking about it, usually as some kind of "natural steroid alternative." If you look into it now, you'll mostly find only two extreme positions: brands aggressively marketing it with bold claims, or skeptics thoroughly criticizing it. There's almost nothing in between. This is an attempt to explore that "middle ground."
A Plant-Derived Phyto-Ecdysteroid
Turkesterone is a phytoecdysteroid, a steroid-like compound produced by certain plants.
The "phyto" part is important because, even though they may look similar to steroids on paper when you look at their structure alone, they don't act like the anabolic steroids people think of in bodybuilding or hormone therapy.
Phytoecdysteroids are essentially a plant's defense system, created to inhibit the growth and reproduction of insects. A related compound, ecdysterone, also known as 20-hydroxyecdysone or 20E, is found in foods like spinach and quinoa.
Turkesterone is a close molecular relative, with an extra hydroxyl group attached at a specific position on the molecule.
It is this slight difference that leads some to argue that turkesterone may be more biologically active. However, there is a caveat here. No direct comparative studies involving humans have actually been conducted yet.
Therefore, at this point, this idea remains merely a hypothesis.
Where Does It Come From?
The richest source of turkesterone is a flowering herb in the mint family called Ajuga turkestanica. It grows in the mountainous regions of Uzbekistan and Tajikistan.
In traditional Central Asian medicine, it has been used for generations as a general health tonic.
Many of the turkesterone supplements available today are made by extracting the compound from this plant. The problem is that it occurs naturally in very small quantities.
For this reason, in this category, standardized extracts and verified COAs (Certificates of Analysis) often tell us more than the label does.
How It Works
A common marketing claim is that Turkesterone provides steroid-like muscle-building effects without the side effects of anabolic steroids.
The first part of that claim is still open to debate. The second part, at least from a chemical standpoint, is more certain.
Turkesterone does not bind to human androgen receptors. This is a crucial difference. Consequently, typical steroid-related issues such as testosterone suppression, hepatotoxicity, hair loss, and hormonal dysfunction do not occur via the same pathways.
The most frequently cited mechanism of action is binding to the beta-type estrogen receptor (ER β). This is based on a 2014 study by Parr et al., though that study focused on ecdysterone, not turkesterone.
Therefore, when you see confident explanations of "how turkesterone works," they usually involve a bit of a leap. In other words, findings from related compounds are being applied to a compound that hasn't actually been studied that directly.
Evidence from Animal and Cell Studies
The reason turkesterone is even being discussed in the first place lies in preclinical research. And the results of those studies are quite consistent.
- In 1976, Syrov administered phytoecdysteroids to castrated rats for 10 days and observed increases in muscle mass, liver weight, and total protein content.
- Subsequently, a follow-up study in 2000 reported that tacestrol acutely enhances protein synthesis, potentially reaching levels comparable to anabolic steroids in that model.
- In 2008, Gorelick-Feldman et al. demonstrated that protein synthesis increased by approximately 20 % in C2C12 muscle cells cultured in the laboratory. Other rodent studies have also confirmed changes in muscle size and mitochondrial activity.
So, does this mean these results can be replicated in humans?
The signals are present and have been observed across different laboratories and models. The problem is that these studies were conducted on cells and animals, not on real-world humans.
What Human Trials Show, and Don't Show
As of 2026, there are three notable human studies on turkesterone. And on paper, they all reach the same conclusion.
- In 2024, Harris et al. administered single doses of 1,000-2,000 mg to 11 young men and examined markers such as IGF-1 and metabolic rate. No significant changes were observed.
- In 2024, Antonio et al. administered 500 mg daily for four weeks to active adults and measured body composition using DXA. Again, no substantial differences were found.
- In 2025, Crisanti et al. conducted a 4-week trial of a product containing turkesterone, tracking body composition, grip strength, mood, sleep, and other factors. The results were the same: no significant changes were observed compared to placebo.
Therefore, it would be easy to stop here and conclude that "it doesn't work for humans." However, upon closer examination, there are several gaps that warrant further attention.
First, all three of these studies classify themselves as preliminary studies. Furthermore, the sample sizes were small, and the study periods were short.
More importantly, none of the studies provided detailed information about the formulations actually used. How were the extracts standardized? What forms of the compound were included? Were any measures taken to improve absorption?
The last question is likely the most critical. According to Dinan et al., turkesterone is known to have issues with bioavailability. This raises a valid question: Did these studies test the compound itself, or did they simply test a form that the body cannot utilize very well?
How to Identify Turkesterone Supplements Worth Trying
1. Standardization
If the label simply says "Ajuga turkestanica extract," it's unclear exactly what's inside. The percentage of Turkestron in the extract must be clearly stated.
2. Bioavailability
Standard turkesterone is not easily absorbed. If a product doesn't address this, it's a problem. Some brands use compounds like cyclodextrin complexes to improve absorption. It's best if these details are clearly stated.
3. Independent Testing
Check if there is a third-party COA from a lab unaffiliated with the company for the specific batch you're considering purchasing.
LVLUP's Turkesterone is manufactured according to these standards. It uses an Ajuga turcestanica extract standardized to 20% turkesterone, complexed with HydroxyPropyl-β-Cyclodextrin for superior bioavailability, and undergoes independent batch testing for every production lot.
Conclusion
Beyond this, the big picture hasn’t changed. Turkesterone is an interesting compound, the early science is there, and the human evidence is still genuinely open.
In a space like this, how a product is sourced and manufactured is far more important than the noise that floods the market.
References
https://pubmed.ncbi.nlm.nih.gov/24974955/
https://pubmed.ncbi.nlm.nih.gov/18220764/
https://pubmed.ncbi.nlm.nih.gov/935080/
https://link.springer.com/article/10.1007/BF02524596
https://pubmed.ncbi.nlm.nih.gov/18444661/
https://pmc.ncbi.nlm.nih.gov/articles/PMC12121319/
https://researchdirects.com/index.php/healthsciences/article/view/126
https://www.tandfonline.com/doi/full/10.1080/15502783.2025.2550140
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