Everything below concerns PPARδ agonist. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-05-02. Numbers and descriptions here follow the published literature rather than marketing material.
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.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
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.
| Property | Value | Notes |
|---|---|---|
| CAS Registry Number | 317318-70-0 | Unique identifier for the compound. |
| Chemical class | PPARδ agonist | Synthetic ligand for peroxisome proliferator-activated receptor delta. |
| Appearance | White to off-white solid | Typical form of research-grade material. |
| Solubility | Soluble in DMSO and ethanol | Poorly soluble in water. |
| Typical storage | -20°C | Recommended for long-term storage of stock solutions. |
=== Laboratory tests === Laboratory tests are sometimes used to check for cachexia. Tests that are used include albumin, C-reactive protein, ghrelin, IGF-2, and leptin. Acute phase reactants (IL-6, IL-1b, tumor necrosis factor, IL-8, interferon gamma and serum cytokines are also studied but are not always reliable for predicting cachexia. Laboratory cut-off values are also not the same across different institutions. There is no single lab test that can confirm cachexia or predict whether it will develop.
Big Tobacco: How the States Took on the Cigarette Giants (1998) online Sivulka, Juliann. Soap, Sex, and Cigarettes: A Cultural History of American Advertising (2nd ed. 2012) online Sobel, Robert. They satisfy: the cigarette in American life (1978) online Sobel R (1974). "James Buchanan Duke: Opportunism Is the Spur". The Entrepreneurs: Explorations Within the American Business Tradition. New York: Weybright & Talley. ISBN 0-679-40064-8. Starks, Tricia. Cigarettes and Soviets: Smoking in the USSR (Cornell University Press, 2022) Starr, Michael E. "The Marlboro Man: Cigarette Smoking and Masculinity in America." Journal of Popular Culture 17 (1984): 45–57. Swanson, Drew A. A Golden Weed: Tobacco and Environment in the Piedmont South (Yale University Press, 2014) 360pp Tennant, Richard B. American Cigarette Industry: A Study in Economic Analysis and Public Policy (Yale UP, 1950) online Tennant, Richard B. "The Cigarette Industry" in The Structure of American Industry, edited by Walter Adams (1961) pp 357–392. online Tilley, Nannie M. The R.J. Reynolds tobacco company (UNC Press Books, 1985), covers history to 1963; part of American Tobacco Company 1899–191, then independent again. online Tilley, Nannie M. The bright-tobacco industry, 1860-1929 (1948) online Tilley, Nannie May. "Agitation Against the American Tobacco Company in North Carolina, 1890-1911." North Carolina Historical Review 24.2 (1947): 207–223. Wagner, Susan. Cigarette Country: Tobacco in American History and Politics (Praeger, 1971). online Wailoo, Keith.
=== Specialty === Another use for affinity chromatography is the purification of specific proteins using a gel matrix that is unique to a specific protein. For example, the purification of E. coli β-galactosidase is accomplished by affinity chromatography using p-aminobenyl-1-thio-β-D-galactopyranosyl agarose as the affinity matrix. p-aminobenyl-1-thio-β-D-galactopyranosyl agarose is used as the affinity matrix because it contains a galactopyranosyl group, which serves as a good substrate analog for E. coli β-Galactosidase. This property allows the enzyme to bind to the stationary phase of the affinity matrix and β-Galactosidase is eluted by adding increasing concentrations of salt to the column.
Linus Carl Pauling was born on February 28, 1901, in Portland, Oregon, the firstborn child of Herman Henry William Pauling (1876–1910) and Lucy Isabelle "Belle" Darling (1881–1926). He was named "Linus Carl", in honor of Lucy's father, Linus, and Herman's father, Carl. His ancestry included German and English-Scottish. In 1902, after his sister Pauline was born, Pauling's parents decided to move out of Portland to find more affordable and spacious living quarters than their one-room apartment. Lucy stayed with her husband's parents in Lake Oswego until Herman brought the family to Salem, where he worked briefly as a traveling salesman for the Skidmore Drug Company. Within a year of Lucile's birth in 1904, Herman Pauling moved his family to Lake Oswego, Oregon where he opened his own drugstore. He moved his family to Condon, Oregon, in 1905. By 1906, Herman Pauling was suffering from recurrent abdominal pain. He died of a perforated ulcer on June 11, 1910, leaving Lucy to care for Linus, Lucile and Pauline. Pauling attributes his interest in becoming a chemist to being amazed by experiments conducted by a friend, Lloyd A. Jeffress, who had a small chemistry lab kit. He later wrote: "I was simply entranced by chemical phenomena, by the reactions in which substances, often with strikingly different properties, appear; and I hoped to learn more and more about this aspect of the world." In high school, Pauling conducted chemistry experiments by scavenging equipment and material from an abandoned steel plant.
Sources: en.wikipedia.org
Label transfer can be used for screening or confirmation of protein interactions and can provide information about the interface where the interaction takes place. Label transfer can also detect weak or transient interactions that are difficult to capture using other in vitro detection strategies. In a label transfer reaction, a known protein is tagged with a detectable label. The label is then passed to an interacting protein, which can then be identified by the presence of the label. Phage display is used for the high-throughput screening of protein interactions. In-vivo crosslinking of protein complexes using photo-reactive amino acid analogs was introduced in 2005 by researchers from the Max Planck Institute In this method, cells are grown with photoreactive diazirine analogs to leucine and methionine, which are incorporated into proteins. Upon exposure to ultraviolet light, the diazirines are activated and bind to interacting proteins that are within a few angstroms of the photo-reactive amino acid analog. Tandem affinity purification (TAP) method allows high throughput identification of protein interactions. In contrast to yeast two-hybrid approach the accuracy of the method can be compared to those of small-scale experiments and the interactions are detected within the correct cellular environment as by co-immunoprecipitation. However, the TAP tag method requires two successive steps of protein purification and consequently it can not readily detect transient protein–protein interactions. Recent genome-wide TAP experiments were performed by Krogan et al.
==== Children's books and other short works ==== In addition to his mythopoeic compositions, Tolkien enjoyed inventing fantasy stories to entertain his children. He wrote annual Christmas letters from Father Christmas for them, building up a series of short stories (later compiled and published as The Father Christmas Letters). Other works included Mr. Bliss and Roverandom (for children), and Leaf by Niggle (part of Tree and Leaf), The Adventures of Tom Bombadil, Smith of Wootton Major and Farmer Giles of Ham. Roverandom and Smith of Wootton Major, like The Hobbit, borrowed ideas from his legendarium.
By the 18th century, Cossack hosts in the Russian Empire occupied effective buffer zones on its borders. The expansionist ambitions of the Empire relied on ensuring Cossack loyalty, which caused tension given their traditional exercise of freedom, democracy, self-rule, and independence. Cossacks such as Stenka Razin, Kondraty Bulavin, Ivan Mazepa and Yemelyan Pugachev led major anti-imperial wars and revolutions in the Empire in order to abolish slavery and harsh bureaucracy, and to maintain independence. The Empire responded with executions and tortures, the destruction of the western part of the Don Cossack Host during the Bulavin Rebellion in 1707–1708, the destruction of Baturyn after Mazepa's rebellion in 1708, and the formal dissolution of the Lower Dnieper Zaporozhian Host after Pugachev's Rebellion in 1775. After the Pugachev rebellion, the Empire renamed the Yaik Host, its capital, the Yaik Cossacks, and the Cossack town of Zimoveyskaya in the Don region to try to encourage the Cossacks to forget the men and their uprisings. It also formally dissolved the Lower Dnieper Zaporozhian Cossack Host, and destroyed their fortress on the Dnieper (the Sich itself). This may in part have been due to the participation of some Zaporozhian and other Ukrainian exiles in Pugachev's rebellion. During his campaign, Pugachev issued manifestos calling for restoration of all borders and freedoms of both the Polish–Lithuanian Commonwealth and the Lower Dnieper (Nyzovyi in Ukrainian) Cossack Host under the joint protectorate of Russia and the Commonwealth.
In 1966, E. O. Wilson and his colleagues identified the fossil remains of an ant (Sphecomyrma) that lived in the Cretaceous period. The specimen, trapped in amber dating back to around 92 million years ago, has features found in some wasps, but not found in modern ants. The oldest fossils of ants date to the mid-Cretaceous, around 113–100 million years ago, which belong to extinct stem-groups such as the Haidomyrmecinae, Sphecomyrminae and Zigrasimeciinae, with modern ant subfamilies appearing towards the end of the Cretaceous around 80–70 million years ago. Ants diversified extensively during the Angiosperm Terrestrial Revolution and assumed ecological dominance around 60 million years ago. Some groups, such as the Leptanillinae and Martialinae, are suggested to have diversified from early primitive ants that were likely to have been predators underneath the surface of the soil. During the Cretaceous period, a few species of primitive ants ranged widely on the Laurasian supercontinent (the Northern Hemisphere). Their representation in the fossil record is poor, in comparison to the populations of other insects, representing only about 1% of fossil evidence of insects in the era. Ants became dominant after adaptive radiation at the beginning of the Paleogene period. By the Oligocene and Miocene, ants had come to represent 20–40% of all insects found in major fossil deposits. Of the species that lived in the Eocene epoch, around one in 10 genera survive to the present.
Her parents divorced when she was 12. Schumer moved to Long Island with her mother and lived in Rockville Centre where she attended South Side High School. She was voted both "Class Clown" and "Teacher's Worst Nightmare" upon graduation in 1999. She attended the Hebrew school of the Central Synagogue of Nassau County, a Reform synagogue in Rockville Centre, where her mother served on the school's board. After graduating from high school, Schumer attended Towson University in Towson, Maryland, where she graduated with a degree in theater in 2003. After graduating from college, she returned to New York City, where she studied at the William Esper Studio for two years and worked as a bartender and a waitress. She also lived with her boyfriend in Santa Barbara, California, where she worked as a pedicab driver. She has a younger sister, Kim Caramele, who is a comedy writer and a producer, and a half-brother, Jason Stein, who is a musician in Chicago, Illinois.
Sources: en.wikipedia.org
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.
No. Cardarine is not an anabolic steroid; it belongs to a different chemical class that targets PPARδ. Steroids act primarily through androgen receptors, while cardarine acts through a nuclear receptor involved in metabolism.
Some rodent studies reported increased endurance and changes in fat metabolism after cardarine exposure. Long-term studies in animals also raised concerns about cancer in certain tissues. Human trial data are limited, so these findings cannot be directly translated to people.
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.