Laxogenin Side Effects: Risks of a Poorly Studied Supplement
Laxogenin — often sold as 5-alpha-hydroxy-laxogenin — is marketed as a plant-derived "anabolic" that builds muscle without hormonal side effects. That is a bold claim for a compound with almost no published human research. Our editorial team examined what is actually known about its safety, and the answer is mostly "not enough."
What laxogenin is and where it comes from
Laxogenin is a steroidal sapogenin — a plant compound with a steroid-like backbone. It has been identified in Smilax sieboldii, a climbing plant used in traditional Asian medicine. Most products, however, contain a synthetic derivative called 5-alpha-hydroxy-laxogenin, which is manufactured from other plant steroids such as diosgenin.
Brassinosteroids, a class of plant growth hormones, are structurally related to laxogenin. Marketing materials often cite rodent research on brassinosteroids showing increased lean mass, then extend those findings to laxogenin. That leap is not supported by direct human evidence.
Laxogenin rose in popularity in the late 2010s after prohormones were banned under the Designer Anabolic Steroid Control Act of 2014. Supplement companies looked for "legal" alternatives, and laxogenin was positioned as one, despite the scarce research base.
Products typically recommend 50–100 mg per day. These amounts come from manufacturers, not from controlled clinical trials establishing efficacy or safety.
Why the safety evidence is so thin
As of our review, we were unable to identify randomized controlled trials in humans that evaluated laxogenin or 5-alpha-hydroxy-laxogenin for muscle growth or safety. Much of the evidence cited by sellers relies on cell studies, animal experiments with related compounds, or anecdotal reports.
This gap matters because steroid-like molecules can have unexpected effects on hormone receptors, liver enzymes, and lipid metabolism. Without systematic testing, side effects that occur in only a minority of users, or that appear only after prolonged use, would go undetected.
Dietary supplements in the US do not require pre-market approval for safety or effectiveness. Under the Dietary Supplement Health and Education Act (DSHEA), the burden falls on the FDA to show a product is unsafe after it is already on sale — a slow process when no one is systematically collecting data.
The result is that consumers essentially become the test subjects. That alone is a reason for caution, independent of any specific adverse effect.
Reported and theoretical side effects
Anecdotal reports from users and from adverse event databases are not proof of causation, but they give some idea of what people experience. Theoretical risks can be inferred from the compound's structure and from similar molecules.
| Possible effect | Basis | Comment |
|---|---|---|
| Digestive upset, nausea | User reports | Common with many saponin-containing products |
| Headache, sleep disturbance | User reports | May relate to other ingredients in blends |
| Changes in lipid profile | Theoretical | Steroidal compounds can affect HDL/LDL |
| Liver stress | Theoretical / contamination | Risk greatly increased if product contains undeclared anabolics |
| Hormonal effects (libido, mood) | Reports, often linked to adulterated products | Pure laxogenin's hormonal activity unconfirmed |
| Unknown long-term effects | Absence of data | No long-term human follow-up exists |
Many reports of "suppression," reduced libido, or elevated liver enzymes in people taking laxogenin products may actually reflect undeclared ingredients, discussed below. This makes it impossible to evaluate laxogenin's own profile from consumer reports.
People with liver disease, high cholesterol, or hormone-sensitive conditions face the highest theoretical risk. Pregnant and breastfeeding women and teenagers should not use such products at all.
Symptoms that should prompt immediate medical attention include yellowing of the skin or eyes, dark urine, persistent abdominal pain, chest pain, or significant swelling.
Label accuracy and hidden ingredients
Perhaps the most important safety issue with laxogenin is not the compound itself but what is actually in the bottle. A 2020 analysis led by Pieter Cohen, published in JAMA Network Open, tested supplements labeled as containing laxogenin and found substantial inaccuracies.
A useful reference here is EZETIMED 10.
The amounts found varied widely from what labels claimed — some products contained little or none of the declared ingredient — and some contained substances that were not listed at all. The findings highlight how loosely controlled this niche is.
- Declared amounts often did not match what was found by laboratory analysis.
- Some products contained undeclared synthetic compounds, including ones never tested in humans.
- Labels frequently used misleading terms such as "natural anabolic" or "non-hormonal."
- Consumers had no way to verify contents without lab testing.
Adulteration with steroids or SARMs has been documented broadly across the "muscle-building" supplement category. These hidden drugs can cause liver injury, hormonal suppression, and positive doping tests. The FDA has issued warnings about hundreds of tainted bodybuilding products over the years.
Choosing products with third-party certification for sport reduces the risk of contamination, although few laxogenin products carry such certification.
Regulatory status and athletes
In the US, a synthetic compound that has never been part of the food supply generally cannot be marketed as a dietary ingredient without a new dietary ingredient notification to the FDA. Many synthetic steroidal ingredients sold as "natural anabolics" sit in this gray zone, and the agency has acted against products in the broader muscle-building category on several occasions.
For athletes, the risk is significant. While laxogenin is not specifically named on the WADA prohibited list, the list includes a broad category of "other anabolic agents" and substances with similar chemical structures or biological effects. More practically, contamination with prohibited substances is common in this category.
The US Anti-Doping Agency classifies many products in this space as high-risk. Under strict liability rules, an athlete is responsible for any prohibited substance found in their sample, regardless of whether it was listed on the label.
Military service members should also be aware that the Department of Defense maintains its own list of prohibited dietary supplement ingredients, which has included several compounds from this category.
Conclusions of the editorial team
Laxogenin's marketing far outpaces its evidence. There are no robust human trials confirming either benefits or safety, and the products themselves are often mislabeled.
The greatest documented risk is not necessarily laxogenin itself, but undeclared ingredients that can harm the liver, suppress hormones, or trigger doping violations.
If your goal is muscle growth, well-studied options — adequate protein, creatine monohydrate, and progressive resistance training — offer far more certainty.
You may also want to read our articles on how supplement adulteration happens, the evidence behind creatine, and how to identify third-party certified products.
References
- Cohen PA, Sharfstein J, Kamugisha A, Vanhee C. Analysis of ingredients of supplements in the National Institutes of Health Supplement Database marketed as containing a novel alternative to anabolic steroids. JAMA Netw Open. 2020;3(4):e202818.
- Esposito D, Komarnytsky S, Shapses S, Raskin I. Anabolic effect of plant brassinosteroid. FASEB J. 2011;25(10):3708–3719.
- Cohen PA. The supplement paradox: negligible benefits, robust consumption. JAMA. 2016;316(14):1453–1454.
- Geyer H, Parr MK, Koehler K, et al. Nutritional supplements cross-contaminated and faked with doping substances. J Mass Spectrom. 2008;43(7):892–902.
- Maughan RJ, Burke LM, Dvorak J, et al. IOC consensus statement: dietary supplements and the high-performance athlete. Br J Sports Med. 2018;52(7):439–455.
