Everything below concerns Investigational drug. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-01-13. Numbers and descriptions here follow the published literature rather than marketing material.
Published studies have examined GW501516 in animal models of obesity, insulin resistance, and exercise endurance. Early human trials reportedly ended, and development was discontinued after preclinical findings raised concerns about cancer in some rodent studies. Regulatory agencies have not approved cardarine for any medical use. Its availability through non-pharmaceutical channels raises questions about identity, purity, and legal status that are separate from its laboratory pharmacology. Those questions are often addressed through analytical testing rather than assumptions about product labels.
Cardarine is a common name for GW501516, also GW-1516, a synthetic compound developed as a peroxisome proliferator-activated receptor delta (PPARδ) agonist. It belongs to a class of agents that modulate gene transcription related to lipid and energy metabolism. The compound was studied in preclinical and early clinical research for metabolic and cardiovascular conditions, but it did not progress to approved therapeutic use. Its name appears in fitness and sports contexts despite not being approved as a drug.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
| Property | Value | Notes |
|---|---|---|
| Chemical class | PPARδ agonist | Not an anabolic steroid. |
| Common synonyms | GW501516, GW-1516 | Cardarine is an informal name. |
| Appearance | White to off-white powder | Typical for research-grade solid. |
| Solubility class | Poorly soluble in water; soluble in some organic solvents | Such as DMSO or ethanol in laboratory settings. |
| Typical storage temperature | Cool, dry, protected from light | Specific conditions vary by supplier and form. |
Products sold as cardarine have been found to contain incorrect compounds, variable amounts, or no active ingredient at all. Independent testing is required to verify identity and purity. Common analytical approaches include high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance for structural confirmation. These methods can distinguish GW501516 from related PPAR agonists and from unrelated steroids. For regulators and researchers, such verification is central to interpreting both biological results and adverse event reports.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
Laboratory handling focuses on identity, purity, and stability. Reference standards are typically stored cold and dry, protected from light, because solutions can degrade over time. Analytical checks may use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Impurities and related substances can be separated chromatographically and compared with a known standard. Because cardarine is not an approved drug, compendial monographs are absent, and laboratories often rely on in-house methods. Reported purity varies among unregulated products and should not be assumed from a label.
GW501516 binds and activates PPARδ, a nuclear receptor that influences transcription of genes involved in fatty acid oxidation and energy use. Activation shifts some metabolic pathways in preclinical models, which is why the compound has been studied for lipid disorders and exercise-related endpoints. The exact downstream effects in humans are incompletely mapped. PPARδ is expressed in many tissues, including skeletal muscle, liver, and adipose tissue, so broad activation may have varied consequences. Researchers continue to examine how selective or partial activation might alter the balance between benefits and risks.
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
In plant anatomy, tissues are categorized broadly into three tissue systems: the epidermis, the ground tissue, and the vascular tissue. Epidermis – Cells forming the outer surface of the leaves and of the young plant body. Vascular tissue – The primary components of vascular tissue are the xylem and phloem. These transport fluids and nutrients internally. Ground tissue – Ground tissue is less differentiated than other tissues. Ground tissue manufactures nutrients by photosynthesis and stores reserve nutrients. Plant tissues can also be divided differently into two types:
=== Cardiovascular disease === A 2011 systematic review evaluated the effectiveness of creatine and creatine analogues in adults with cardiovascular disease, including heart failure and myocardial infarction. The studies assessed the use of various creatine-based compounds—such as creatine, creatine phosphate, and phosphocreatinine—administered via oral, intravenous, or intramuscular routes, typically as adjuncts to standard therapy. The analysis found no conclusive evidence that creatine or its analogues significantly affect mortality, myocardial infarction progression, or ejection fraction. However, some studies suggested a potential improvement in cardiac dysrhythmias and dyspnoea. The trials varied considerably in terms of drug formulation, dosage, treatment duration, and patient populations. Notably, no studies were identified that examined the effects of these compounds in patients with essential hypertension. Due to the small sample sizes, clinical heterogeneity, and inconsistent outcomes across trials, the authors concluded that more rigorous and larger-scale studies are necessary to establish the clinical utility of creatine analogues in cardiovascular care.
The electoral system in Sweden is proportional. Of the 349 seats in the unicameral Riksdag, 310 are fixed constituency seats allocated to 29 multi-member constituencies in relation to the number of people entitled to vote in each constituency. The remaining 39 adjustment seats are used to correct the deviations from proportional national distribution that may arise when allocating the fixed constituency seats. There is a constraint in the system that means that only a party that has received at least four per cent of the votes in the whole country participates in the distribution of seats. However, a party that has received at least twelve per cent of the votes in a constituency participates in the distribution of the fixed constituency seats in that constituency.
This allows other ants to detect what task group (e.g., foraging or nest maintenance) other colony members belong to. In ant species with queen castes, when the dominant queen stops producing a specific pheromone, workers begin to raise new queens in the colony. Some ants produce sounds by stridulation, using the gaster segments and their mandibles. Sounds may be used to communicate with colony members or with other species.
Sources: en.wikipedia.org
Histology (also known as microanatomy or histoanatomy) is the branch of medicine that studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures visible without a microscope. Histopathology is the branch of histology that includes the microscopic identification and study of diseased tissue.
==== Power generation ==== The unique properties of sCO2 present advantages for closed-loop power generation and can be applied to power generation applications. Power generation systems that use traditional air Brayton and steam Rankine cycles can use sCO2 to increase efficiency and power output. The relatively new Allam power cycle uses sCO2 as the working fluid in combination with fuel and pure oxygen. The CO2 produced by combustion mixes with the sCO2 working fluid. A corresponding amount of pure CO2 must be removed from the process (for industrial use or sequestration). This process reduces atmospheric emissions to zero. sCO2 promises substantial efficiency improvements. Due to its high fluid density, sCO2 enables compact and efficient turbomachinery. It can use simpler, single casing body designs while steam turbines require multiple turbine stages and associated casings, as well as additional inlet and outlet piping. The high density allows more compact, microchannel-based heat exchanger technology. For concentrated solar power, carbon dioxide critical temperature is not high enough to obtain the maximum energy conversion efficiency. Solar thermal plants are usually located in arid areas, so it is impossible to cool down the heat sink to sub-critical temperatures. Therefore, supercritical carbon dioxide blends, with higher critical temperatures, are in development to improve concentrated solar power electricity production.
=== Post-production === The filmmakers experimented with the visuals of Mega-City One, including the design and positioning of the city's tower blocks, to create the impression that the city had risen out of the remains of another. They found that replicating the comic visuals of blocks close together made the blocks appear small. Instead, they allowed more space between the buildings to emphasise the larger buildings and allow for the presence of roads and cars to allow for extrapolation outside of the picture. Outcrops and appendages were added to break up the buildings' straight lines. On 7 October 2011, the Los Angeles Times reported that Travis was prohibited from participating in the editing process following creative disagreements between producers and executives. Garland took over the editing process; his contribution was considered significant enough for him to seek a co-director credit—a situation considered unusual as Garland had never directed a film before and had not been in charge of any filming. The disagreement concerned a disapproval over the footage that Travis was providing. Although Travis was removed from the editing process, he was monitoring the progress of the film. On 10 October, Travis and Garland released a joint statement saying that they had agreed on an "unorthodox collaboration" before production began, that Travis was still involved in the film and that Garland was not seeking a co-director credit. In March 2018, Urban said that he believed Dredd should be considered Garland's directorial debut.
=== Reinke's edema === A voice pathology called Reinke's edema, swelling due to abnormal accumulation of fluid, occurs in the superficial lamina propria or Reinke's space. This causes the vocal fold mucosa to appear floppy with excessive movement of the cover that has been described as looking like a loose sock. The greater mass of the vocal folds due to increased fluid lowers the fundamental frequency during phonation.
Lance Henriksen at IMDb Lance Henriksen at the TCM Movie Database (archived) Lance Henriksen at the Internet Broadway Database Films in Review interview Archived September 9, 2018, at the Wayback Machine
Sources: en.wikipedia.org
Royal jelly is a honey bee secretion that is used in the nutrition of larvae and adult queens. It is secreted from the glands in the hypopharynx of nurse bees, and fed to all larvae in the colony, regardless of sex or caste.
== Technical background == For a pure sample of a substance X, the known molar mass, M(X), is used for calculating the amount of the substance in the sample, n(X), given the mass of the sample, m(X), through the equation: n(X) = m(X)/M(X). If N(X) is the number of entities of the substance in the sample, and ma(X) is the mass of each entity of the substance (atomic mass, molecular mass, or formula mass), then the mass of the sample is m(X) = N(X) ⋅ ma(X), and the amount of substance is n(X) = N(X)/NA = N(X) ⋅ na, where na is the elementary amount, an amount consisting of exactly one atomic-scale entity of any kind (atom, molecule, formula unit), analogous to the elementary charge e. Since the elementary amount is the reciprocal of the Avogadro constant, using the relationship M(X) = m(X)/n(X), the molar mass is then given by M(X) = ma(X) ⋅ NA = ma(X)/na (dimension M/N), i.e. the atomic-scale mass of one entity of the substance per elementary amount. Given the relative atomic-scale mass (atomic weight, molecular weight, or formula weight) Ar(X) of an entity of a substance X, its mass expressed in daltons is ma(X) = Ar(X) Da, where the atomic-scale unit of mass is defined as 1 Da = mu = ma(12C)/12 (dimension M). The corresponding atomic-scale unit of amount of substance is the entity (symbol ent), defined as 1 ent = na (dimension N). So, with Ar(X) known, the molar mass can be expressed in daltons per entity as M(X) = Ar(X) Da/ent.
1979 Elected member, European Molecular Biology Organization. 1987 Meyenburg Prize for Cancer Research. 1995 Elected member, Academia Europaea. 1997 Doctorate honoris causa, Pomeranian Medical Academy, Szczecin, Poland. 1998 Carl Zeiss Prize, German Society of Cell Biology, (shared with Klaus Weber). 1998 Helena Rubenstein / UNESCO Prize for Women in Science (UK). 2002 L'Oréal / UNESCO Prize for Women in Science. 2003-2006 President of the International Union of Biochemistry and Molecular Biology (IUBMB). 2005 Outstanding Science Alumni Award, Pennsylvania State University, USA. 2014. Federal Cross of Merit, 1st Class, Federal Republic of Germany. 2007 Dorothea Schlözer Medal, University of Göttingen, Germany.
== History == Xylazine was discovered as an antihypertensive agent in 1962 by Farbenfabriken Bayer in Leverkusen, West Germany. In human trials xylazine was found to depress the central nervous system leading to the discontinuation of further research for its use in humans and it was instead marketed as a veterinary sedative, starting in the late 1960s. Xylazine proved popular and in the 1970s became one of the most common large animal sedatives. Xylazine's muscle relaxant effect inhibits the transmission of neural impulses in the central nervous system. In 1981 a study discovered that the cause sedation was due to xylazine's effect on the α2-adrenergic receptor. This led to the development of other α2-adrenergic receptor agonists such as detomidine, medetomidine, dexmedetomidine, and romifidine. In the United States, xylazine was approved by the FDA only for veterinary use as a sedative, analgesic, and muscle relaxant in dogs, cats, horses, elk, fallow deer, mule deer, sika deer, and white-tailed deer. In scientific research using animal experiments, xylazine is a component of the most common anesthetic, ketamine-xylazine (see: Rodent cocktail), to anesthetize rats, mice, hamsters, and guinea pigs. Xylazine has not previously been a controlled substance; however, due to illicit abuse, legislative restrictions have been proposed in multiple countries. Xylazine was made a class C drug in the UK on 15 January 2025.
The skeletal effects of parathyroid hormone depend upon the pattern of systemic exposure. Transient elevations in parathyroid hormone levels after subcutaneous injection of Preotact stimulates new bone formation on trabecular and cortical bone surfaces by preferential stimulation of osteoblastic activity over osteoclastic activity.
Sources: en.wikipedia.org
Cardarine is commonly known as GW501516 or GW-1516. These names refer to the same synthetic compound. It is not a brand-name approved medicine.
No, cardarine is not a steroid. It is classified as a PPARδ agonist. Its structure and receptor target differ from anabolic steroids.
No regulatory agency has approved cardarine as a medicine. It was investigated in early research but development was discontinued. It is not available as a prescription drug.
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.