Product guide · Restricted substance
Hammer Labz Power Mass Stack 60 caps
Research compound from Hammer Labz, 60 capsules. This guide sets out what the manufacturer states about the composition of Hammer Labz Power Mass Stack 60 caps, what independent research says about its main ingredients, and the safety and regulatory points that apply. It contains substances that are not authorised as food or medicine in the EU. This guide is educational: it does not recommend use and gives no directions for use.
Back to the product- Named ingredients
- 3
- Amounts stated
- None
- Status
- Restricted substance
- Evidence summaries
- 3
Overview
Manufacturer informationIngredients & composition
Manufacturer information| Ingredient | Amount |
|---|---|
| MK-2866 (Ostarine) | Not stated |
| LGD-4033 (Ligandrol) | Not stated |
| RAD-140 (Testolone) | Not stated |
The manufacturer does not state the amount of any ingredient. Without amounts, the research summarised in this guide cannot be related to this product's dose.
Scientific background
Independent researchOstarine (MK-2866, enobosarm)
Ostarine (also called MK-2866, GTx-024 or enobosarm) is a selective androgen receptor modulator developed as an investigational drug for muscle wasting1. OTR-AC is marketed as an acetylated (ester) form of ostarine; no human research on it has been published.
LGD-4033 (ligandrol)
LGD-4033 (ligandrol) is a non-steroidal selective androgen receptor modulator developed as an investigational drug for muscle wasting2.
RAD-140 (testolone)
RAD-140 (testolone) is a selective androgen receptor modulator (SARM): a synthetic, non-steroidal compound designed to activate androgen receptors in muscle and bone while having less effect on other tissues. It was developed as an investigational drug3.
Research evidence
Independent researchOstarine (MK-2866, enobosarm)
A phase 2 trial in healthy older men and postmenopausal women found a dose-dependent increase in lean body mass and physical function over 12 weeks1. A phase 2 trial in people with cancer reported improved lean body mass4. These are clinical-development studies in specific patient groups, not studies of sports or bodybuilding use.
LGD-4033 (ligandrol)
In a 21-day randomised, placebo-controlled trial in 76 healthy young men, LGD-4033 increased lean body mass. It also caused dose-dependent suppression of total testosterone, sex hormone-binding globulin, HDL ("good") cholesterol and triglycerides2.
A systematic review of randomised SARM trials reports positive effects on body composition and physical performance with moderate rates of mild to moderate adverse effects5.
RAD-140 (testolone)
Preclinical studies in animals showed anabolic effects on muscle3. The only published human trial is a phase 1 study in women with advanced, hormone-receptor-positive breast cancer, which assessed safety and dosing in that disease; it was not a study of muscle or performance in healthy people6.
A systematic review of randomised trials of SARMs in general found positive effects on physical performance and body composition in the trials reviewed, with moderate rates of mild to moderate adverse effects5.
Evidence limitations
Independent researchThis product does not state all ingredient amounts, so the doses used in research cannot be compared with what one serving provides.
The studies summarised in this guide examined single ingredients. No published study has tested this product or this combination of ingredients.
Ostarine (MK-2866, enobosarm)
Phase 2 results do not establish efficacy or long-term safety, and the compound has not been approved as a medicine. Analyses of products sold online as SARMs found that many did not contain the substance or amount stated on the label, and some contained other unapproved drugs7.
LGD-4033 (ligandrol)
The human data come from short trials at low doses under medical supervision. There are no long-term safety or outcome data2. Analyses of products sold online as SARMs found that many did not contain the substance or amount stated on the label, and some contained other unapproved drugs7.
RAD-140 (testolone)
There are no controlled trials of RAD-140 in healthy people, so its effects and risks at the amounts used outside research are unknown. Analyses of products sold online as SARMs found that many did not contain what the label stated, or contained other unapproved substances7.
Safety & potential risks
Independent researchOstarine (MK-2866, enobosarm)
A systematic review of SARM use by athletes reports liver toxicity, heart toxicity, tendon damage, suppression of natural testosterone and other androgenic effects8. A national case series linked SARMs and other bodybuilding products to drug-induced liver injury9.
LGD-4033 (ligandrol)
Cholestatic liver injury, confirmed by biopsy, has been reported in a person using ligandrol10. A systematic review of SARM use by athletes reports liver toxicity, heart toxicity, tendon damage, suppression of natural testosterone and other androgenic effects8. A national case series linked SARMs and other bodybuilding products to drug-induced liver injury9.
RAD-140 (testolone)
Case reports describe drug-induced liver injury, including jaundice, in people using products containing RAD-14011. A national case series linked SARMs and other bodybuilding products to drug-induced liver injury9.
A systematic review of SARM use by athletes reports liver toxicity, heart toxicity, tendon damage, suppression of natural testosterone and other androgenic effects8.
Regulatory status
Contains ostarine (MK-2866), ligandrol (LGD-4033) and testolone (RAD-140), selective androgen receptor modulators (SARMs). SARMs are investigational substances that are not authorised as medicinal products or as food (including food supplements) in the EU, and they are on the World Anti-Doping Agency (WADA) Prohibited List. No dosing information for human use is provided.
Ostarine (MK-2866, enobosarm)
Ostarine is not an approved medicine and is not permitted in food or food supplements in the EU1213. SARMs have been on the World Anti-Doping Agency Prohibited List since 2008 and are prohibited at all times1415.
Scientific references
- Dalton JT, Barnette KG, Bohl CE, et al. The selective androgen receptor modulator GTx-024 (enobosarm) improves lean body mass and physical function in healthy elderly men and postmenopausal women: results of a double-blind, placebo-controlled phase II trial. J Cachexia Sarcopenia Muscle. 2011;2:153-161. PubMed 22031847
- Basaria S, Collins L, Dillon EL, et al. The safety, pharmacokinetics, and effects of LGD-4033, a novel nonsteroidal oral, selective androgen receptor modulator, in healthy young men. J Gerontol A Biol Sci Med Sci. 2013;68:87-95. PubMed 22459616
- Miller CP, Shomali M, Lyttle CR, et al. Design, synthesis, and preclinical characterization of the selective androgen receptor modulator (SARM) RAD140. ACS Med Chem Lett. 2011;2:124-129. PubMed 24900290
- Dobs AS, Boccia RV, Croot CC, et al. Effects of enobosarm on muscle wasting and physical function in patients with cancer: a double-blind, randomised controlled phase 2 trial. Lancet Oncol. 2013;14:335-345. PubMed 23499390
- Wen J, Syed B, Leapart J, et al. Selective androgen receptor modulators (SARMs) effects on physical performance: a systematic review of randomized control trials. Clin Endocrinol (Oxf). 2025;102:3-27. PubMed 39285652
- LoRusso P, Hamilton E, Ma C, et al. A first-in-human phase 1 study of a novel selective androgen receptor modulator (SARM), RAD140, in ER+/HER2- metastatic breast cancer. Clin Breast Cancer. 2022;22:67-77. PubMed 34565686
- Van Wagoner RM, Eichner A, Bhasin S, et al. Chemical composition and labeling of substances marketed as selective androgen receptor modulators and sold via the internet. JAMA. 2017;318:2004-2010. PubMed 29183075
- Vasireddi N, Hahamyan HA, Gould HP, et al. Athlete selective androgen receptor modulators abuse: a systematic review. Am J Sports Med. 2025;53:999-1009. PubMed 39755947
- Nash E, Nicoll A, Batt N, et al. Drug-induced liver injury from selective androgen receptor modulators, anabolic-androgenic steroids and bodybuilding supplements in Australia. Aliment Pharmacol Ther. 2024;59:953-961. PubMed 38372012
- Barbara M, Dhingra S, Mindikoglu AL. Ligandrol (LGD-4033)-induced liver injury. ACG Case Rep J. 2020;7:e00370. PubMed 32637435
- Barbara M, Dhingra S, Mindikoglu AL. Drug-induced liver injury associated with Alpha Bolic (RAD-140) and Alpha Elite (RAD-140 and LGD-4033). ACG Case Rep J. 2020;7:e00409. PubMed 33062783
- Directive 2001/83/EC on the Community code relating to medicinal products for human use. Official Journal of the European Union. Source
- Regulation (EU) 2015/2283 on novel foods. Official Journal of the European Union. Source
- Thevis M, Schänzer W. Detection of SARMs in doping control analysis. Mol Cell Endocrinol. 2018;464:34-45. PubMed 28137616
- World Anti-Doping Agency. The Prohibited List (current edition). Source
Sources checked against PubMed, Crossref or the official publisher on 2026-11-04. Manufacturer information is taken from the product's own data and has not been independently tested.
The product
Hammer Labz Power Mass Stack 60 caps
€74,90