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Identity And Pharmacological Classification — Deep Dive

By Editorial Desk · published 2025-07-10 · last reviewed 2025-08-10 · Guide

Everything below concerns PPARδ agonist. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.

Last reviewed on 2025-08-10. Where a claim depends on a specific study, the study is described rather than over-claimed.

Identity and Pharmacological Classification

PPARδ is a nuclear receptor that influences transcription of genes involved in fatty acid oxidation, lipid transport, and energy homeostasis. GW501516 binds and activates this receptor with high selectivity relative to PPARα and PPARγ in laboratory assays. Activation alters expression of target genes in skeletal muscle, liver, and adipose tissue in animal models. The exact clinical consequences of these changes in humans remain incompletely characterized, and observed effects in animals do not establish therapeutic benefit or safety.

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.

Background and Research Context

In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.

Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.

Cardarine at a glance

PropertyValueNotes
Chemical classPPARδ agonistNot an anabolic steroid.
Common synonymsGW501516, GW-1516Cardarine is an informal name.
AppearanceWhite to off-white powderTypical for research-grade solid.
Solubility classPoorly soluble in water; soluble in some organic solventsSuch as DMSO or ethanol in laboratory settings.
Typical storage temperatureCool, dry, protected from lightSpecific conditions vary by supplier and form.

Supporting material

These two are the heaviest isotopes of dubnium to date, and both were produced as a result of decay of the heavier nuclei 288Mc and 294Ts rather than directly, because the experiments that yielded them were originally designed in Dubna for 48Ca beams. For its mass, 48Ca has by far the greatest neutron excess of all practically stable nuclei, both quantitative and relative, which correspondingly helps synthesize superheavy nuclei with more neutrons, but this gain is compensated by the decreased likelihood of fusion for high atomic numbers.

=== EURATOM === The European Atomic Energy Community (EURATOM) was founded on March 25, 1957, by the Treaty of Rome between France, Italy, the Benelux countries and the Federal Republic of Germany, and remains almost unchanged to this day. Chapter 3 of the Euratom Treaty regulates measures to protect the health of the population. Article 35 requires facilities for the continuous monitoring of soil, air and water for radioactivity. As a result, monitoring networks have been set up in all Member States and the data collected is sent to the EU's central database (EURDEP, European Radiological Data Exchange Platform). The platform is part of the EU's ECURIE system for the exchange of information in the event of radiological emergencies and became operational in 1995. Switzerland also participates in this information system.

Intracellular bacterial pathogens invade eukaryotic cells (which may lead to the formation of phagolysosomes and/or autophagy activation), or bacteria may be engulfed by phagocytes (macrophages, monocytes, neutrophils...). The bacteria-containing phagosome may then fuse with endosomes and lysosomes, leading to degradation of bacteria and generation of polymeric peptidoglycan fragments and muropeptides.

A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties. Edible thickeners are commonly used to thicken sauces, soups, and puddings without altering their taste; thickeners are also used in paints, inks, explosives, and cosmetics. Thickeners may also improve the suspension of other ingredients or emulsions which increases the stability of the product. Thickening agents are often regulated as food additives and as cosmetics and personal hygiene product ingredients. Some thickening agents are gelling agents (gellants), forming a gel, dissolving in the liquid phase as a colloid mixture that forms a weakly cohesive internal structure. Others act as mechanical thixotropic additives with discrete particles adhering or interlocking to resist strain. Thickening agents can also be used when a medical condition such as dysphagia causes difficulty in swallowing. Some of these people may benefit from thickened fluids, but the benefits are limited. Many other food ingredients are used as thickeners, usually in the final stages of preparation of specific foods. These thickeners have a flavor and are not markedly stable, thus are not suitable for general use. However, they are very convenient and effective, and hence are widely used. Different thickeners may be more or less suitable in a given application, due to differences in taste, clarity, and their responses to chemical and physical conditions.

== Contraindications == Benzodiazepines require special precaution if used in the elderly, during pregnancy, in children, alcohol or drug-dependent individuals, and individuals with comorbid psychiatric disorders. Because of their muscle relaxant action, benzodiazepines may cause respiratory depression in susceptible individuals. For that reason, they are contraindicated in people with myasthenia gravis, sleep apnea, bronchitis, and COPD. Caution is required when benzodiazepines are used in people with personality disorders or intellectual disability because of frequent paradoxical reactions. In major depression, they may precipitate suicidal tendencies and are sometimes used for suicidal overdoses. Individuals with a history of excessive alcohol use or non-medical use of opioids or barbiturates should avoid benzodiazepines, as there is a risk of life-threatening interactions with these drugs.

Sources: en.wikipedia.org

Related pages on this site

Notes from published material

After the 1986 People Power Revolution that toppled the regime of President Ferdinand Marcos, Duterte was appointed officer-in-charge vice mayor of Davao City by President Corazon Aquino. In the 1988 local elections, he ran for mayor under Lakas ng Dabaw, a local political alliance, defeating former OIC Mayor Zafiro Respicio by a narrow margin of 6,000 votes. As mayor of Davao City, Duterte made efforts to unite the different tribes and political groups in the city. He set a precedent by designating deputy mayors to represent the administrative districts, as well as the Lumad and Moro peoples in the city government; this was later copied by other cities in other parts of the Philippines. In December 1990, Duterte joined the Nacionalista Party upon the persuasion of Senator Juan Ponce Enrile. In 1992, he successfully defended his seat from 1st district representative Prospero Nograles. In 1995, after Flor Contemplacion, a Filipina, was executed in Singapore after confessing to a double murder, Duterte allegedly burned a flag of Singapore (though this claim was later denied) and joined 1,000 employees of Davao City in protest. In 1998, because he was term-limited to run again for mayor, Duterte ran and won as congressman of the city's 1st district under Laban ng Makabayang Masang Pilipino. He was a member of five House committees, namely: National Defense, Public Order and Security, Health, Transportation and Communications, and Cooperative Development. He filed 64 measures, including 45 bills, with one enacted into law—Republic Act No.

Concurrently, the Bureau of Longitude Studies and the Observatory were undertaking a comprehensive review of his extensive barometric and astronomical measurements. Furthermore, artists had been commissioned to commence the replication of his botanical sketches and illustrations of ancient Indian monuments. At this time, Napoleon Bonaparte was the only person in Europe with greater fame than Humboldt. Their sole meeting was unsuccessful, with Napoleon responding coldly, possibly viewing Humboldt as a politically suspect foreigner. Despite this, Napoleon granted a pension to Bonpland but later attempted to expel Humboldt from Paris on suspicion of espionage. Paris, despite political changes since Humboldt’s departure, was now the leading center of science, offering exceptional resources and collaborators. Humboldt chose to remain, preferring Paris’s intellectual and social environment over Berlin, which he considered unappealing. He immersed himself in work, organizing his extensive collections and distributing specimens to various institutions. Bonpland kept the most complete set of plant specimens, with other collections sent to major European botanical gardens. Humboldt’s dedication to processing and publishing his scientific findings required several years of intense effort. During their American expedition, Alexander von Humboldt and Aimé Bonpland encountered numerous challenges and hardships, many of which were described in Humboldt’s Voyage aux régions équinoxiales du Nouveau Continent and related works.

It was definitively accepted by the Fédération Cynologique Internationale in 1954. In the fifteen years from 2007 to 2021, the annual number of new registrations in Germany averaged about 485, with a low of 390 and a high of 607.

=== Other live performances === Clipse performed at the DuSable Black History Museum in Chicago, Illinois on August 24, 2024, for the Pepsi Dig In Day Block Party—a free event celebrating Black-owned restaurants. Clipse performed "Ace Trumpets" on June 26, 2025, for A Colors Show—a live performance series by German media company ColorsxStudios. Audio of the performance was released as a single on streaming services the same day. They performed an NPR Tiny Desk concert on July 11, concurrently with the album's release. A few days later, on July 15, they performed "The Birds Don't Sing" on The Tonight Show Starring Jimmy Fallon. During 2025 Jubilee, the "World Meeting on Human Fraternity 2025" took place on the St. Peter's Square at the Vatican City on 12 and 13 September, with concert of Andrea Bocelli, Pharrell Williams with the gospel choir Voices of Fire, and John Legend. Clipse performed the song "The Birds Don't Sing" along with John Legend at the second date during the Grace For The World concert on September 13, making history for being the first rappers to ever perform at the Vatican City. The duo performed "So Be It" on Jimmy Kimmel Live! in October 2025.

Sources: en.wikipedia.org

Further detail

== Oxygen-17 == Oxygen-17 (17O) is the rarest of the three stable isotopes of oxygen with a low isotopic abundance of about 0.038% = 380 ppm in terrestrial water and air. Naturally 17O is primarily made by burning hydrogen into helium in the CNO cycle, making it a common isotope in the hydrogen burning zones of stars. As the only stable isotope of oxygen possessing a nuclear spin (+5⁄2) and a favorable characteristic of field-independent relaxation in liquid water, through extreme motional narrowing.17O enables NMR studies tracing oxidative metabolic pathways (i.e. conversion of 17O2 gas to metabolically produced H217O water by oxidative phosphorylation in mitochondria) at high magnetic fields. This is a necessary requirement to overcome the low SNR from low abundance, low gyromagnetic ratio and fast quadrupolar transversal relaxation in contrast to proton/hydrogen, which is the most commonly used nucleus in magnetic resonance. Water used as nuclear reactor coolant is subjected to intense neutron flux. Natural water starts out with 0.038% of 17O; heavy water starts out incidentally enriched to about 0.055% in that isotopes. Further, the neutron flux slowly converts 16O in the cooling water to 17O by neutron capture, increasing its concentration. The neutron flux slowly converts 17O (with much greater cross section) in the cooling water to carbon-14, an undesirable product that can escape to the environment:

== History == In June 2000, the European Commission formally approved the launching of Lantus by Sanofi-Aventis Germany in the European Union. The admission was prolonged on 9 June 2005. A three-fold more concentrated formulation, brand name Toujeo, was introduced after FDA approval in 2015.

==== South Ossetian attacks and Georgian response ==== The commission said that a government "is generally not prevented" to use armed force against opposing side in internal conflicts, such as rebels or violent secessionists. However, the report said that Georgia had a non-use of force commitment under the international legal documents, such as the 1992 Sochi Agreement and 1996 Memorandum on Measures to Provide Security and Strengthen Mutual Trust between the Sides in the Georgian-South Ossetian Conflict. The commission said that the South Ossetian attacks on Georgian villages (Zemo Nikozi, Kvemo Nikozi, Avnevi, Nuli, Ergneti, Eredvi and Zemo Prisi) equaled to an "attack by the armed forces of a State on the territory of another State" similar to the situations described in Art. 3(a) of UN Resolution 3314. Since the South Ossetian attacks mainly targeted Georgian peacekeepers and Georgian police, this was "an attack by the armed forces of South Ossetia on the land forces of Georgia". The commission found out that several residents of the assaulted villages became casualties in "the acts preceding the outbreak of the hostilities" and "From 6 August on, continuous heavy fighting took place." The commission could not prove that Russian peacekeepers took part in the attacks on Georgian villages, but noted that "Such attacks were rather initiated by the South Ossetian militia." The commission also said "South Ossetia violated the prohibition of the use of force" as long as South Ossetia had attacked the Georgian villages.

Sources: en.wikipedia.org

Frequently asked questions

What is cardarine also known as?

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.

Is cardarine a steroid?

No, cardarine is not a steroid. It is classified as a PPARδ agonist. Its structure and receptor target differ from anabolic steroids.

Has cardarine been approved for human use?

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.

What is cardarine?

Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.

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