The short version of LC-MS/MS fits in a sentence. The long version — which is the one that helps — is below.
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Cardarine is frequently described as a fat-burning or endurance-enhancing supplement, but these claims exceed the available evidence. The compound is not a hormone, steroid, or selective androgen receptor modulator. Research articles discuss it as a tool compound for studying PPARδ biology, while anti-doping literature focuses on its abuse and detection. Quality of unapproved products is uncertain, and independent analyses have found impurities or incorrect labeling. Open questions include whether human cancer risk resembles that seen in rodents and how often non-athletes use the substance.
Cardarine has no approved therapeutic indication and is not marketed as a medicine. The World Anti-Doping Agency lists GW501516 as a prohibited substance at all times, covering both in-competition and out-of-competition periods. National laws vary: some countries treat it as an unapproved drug subject to import controls, while others have specific restrictions on sale for human consumption. It is often sold as a research chemical, a label that does not imply safety or legality. Enforcement actions have targeted online vendors and shipments.
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.
Published human data are sparse and mostly come from early-phase trials. Those studies examined short-term changes in lipids, glucose, and exercise capacity, but they were not large enough to establish efficacy or long-term safety. Some animal experiments reported increased running endurance, yet such findings do not prove a performance benefit in people. Anti-doping laboratories detect GW501516 and its metabolites in urine or blood using liquid chromatography-tandem mass spectrometry. Detection windows depend on dose, sample type, and individual metabolism. The method is sensitive enough to identify trace residues in tested samples.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport; not approved as medicine | Listed by WADA at all times. |
| Common synonyms | GW501516, GW-501516, endurobol | Cardarine is a colloquial name. |
| Typical analytical method | LC-MS/MS | Detects parent compound and metabolites. |
| Common test matrix | Urine | Blood and dried blood spots also possible. |
| Legal classification | Varies by country | Often treated as unapproved drug or research chemical. |
== External links == Overview of all the structural information available in the PDB for UniProt: P06241 (Human Tyrosine-protein kinase Fyn) at the PDBe-KB. Overview of all the structural information available in the PDB for UniProt: P39688 (Mouse Tyrosine-protein kinase Fyn) at the PDBe-KB.
Radium has 33 known isotopes with mass numbers from 202 to 234, all of which are radioactive. Four of these – 223Ra (half-life 11.4 days), 224Ra (3.64 days), 226Ra (1600 years), and 228Ra (5.75 years) – occur naturally in the decay chains of primordial thorium-232, uranium-235, and uranium-238 (223Ra from uranium-235, 226Ra from uranium-238, and the other two from thorium-232). These isotopes nevertheless still have half-lives too short to be primordial radionuclides, and only exist in nature from these decay chains. Together with the mostly artificial 225Ra (15 d), which occurs in nature only as a decay product of minute traces of neptunium-237, these are the five most stable isotopes of radium. All other 27 known radium isotopes have half-lives under two hours, and the majority have half-lives under a minute. Of these, 221Ra (half-life 28 s) also occurs as a 237Np daughter, and 220Ra and 222Ra would be produced by the still-unobserved double beta decay of natural radon isotopes. At least 12 nuclear isomers have been reported, the most stable of which is radium-205m with a half-life between 130~230 milliseconds; this is still shorter than twenty-four ground-state radium isotopes. 226Ra is the most stable isotope of radium and is the last isotope in the (4n + 2) decay chain of uranium-238 with a half-life of over a millennium; it makes up almost all of natural radium. Its immediate decay product is the dense radioactive noble gas radon (specifically the isotope 222Rn), which is responsible for much of the danger of environmental radium.
Ion channel linked receptors are a group of transmembrane ion-channel proteins which open to allow ions such as Na+, K+, Ca2+, and/or Cl− to pass through the membrane in response to the binding of a chemical messenger (i.e. a ligand), such as a neurotransmitter. When a presynaptic neuron is excited, it releases a neurotransmitter from vesicles into the synaptic cleft. The neurotransmitter then binds to receptors located on the postsynaptic neuron. If these receptors are ligand-gated ion channels (LICs), a resulting conformational change opens the ion channels, which leads to a flow of ions across the cell membrane. This, in turn, results in either a depolarization, for an excitatory receptor response, or a hyperpolarization, for an inhibitory response. These receptor proteins are typically composed of at least two different domains: a transmembrane domain which includes the ion pore, and an extracellular domain which includes the ligand binding location (an allosteric binding site). This modularity has enabled a 'divide and conquer' approach to finding the structure of the proteins (crystallising each domain separately). The function of such receptors located at synapses is to convert the chemical signal of presynaptically released neurotransmitter directly and very quickly into a postsynaptic electrical signal. Many LICs are additionally modulated by allosteric ligands, by channel blockers, ions, or the membrane potential.
The Socialist Republic of Bosnia and Herzegovina (SR Bosnia and Herzegovina; SR BiH), commonly referred to as Socialist Bosnia or simply Bosnia, was one of the six constituent republics forming the Socialist Federal Republic of Yugoslavia. It was a predecessor of the modern-day Bosnia and Herzegovina, existing between 1945 and 1992, under a number of different formal names, including Democratic Bosnia and Herzegovina (1943–1945), Federal State of Bosnia and Herzegovina (1945–1946), and People's Republic of Bosnia and Herzegovina (1946–1963). Within Yugoslavia, Bosnia and Herzegovina was a unique federal unit with no dominant ethnic group, as was the case in other constituent states, all of which were also nation states of Yugoslavia's South Slavic ethnic groups. It was administered under strict terms of sanctioned consociationalism, known locally as "ethnic key" or "national key" (Serbo-Croatian: etnički/nacionalni ključ), based on the balance of political representation of 3 largest ethnic groups (Bosnian Muslims, Croats and Serbs). Sarajevo served as the capital city throughout its existence and remained the capital following independence. The Socialist Republic was dissolved in 1990 when it abandoned its socialist institutions and adopted liberal ones, as the Republic of Bosnia and Herzegovina which declared independence from Yugoslavia in 1992. The Government of Bosnia and Herzegovina was, up to 20 December 1990, in sole control of the League of Communists of Bosnia and Herzegovina, the Bosnian branch of League of Communists of Yugoslavia.
doi:10.1126/scitranslmed.aaf1059. PMC 5505565. PMID 27225182. Park, J; Wetzel, I; Marriott, I; Dréau, D; D'Avanzo, C; Kim, D-Y; Tanzi, RE; Cho, H (2018). "Neuron-Glia Interactions Recapitulated in a 3D Organotypic Human Alzheimer's Disease Brain Model". Nature Neuroscience. 21 (7): 941–951. doi:10.1038/s41593-018-0175-4. PMC 6800152. PMID 29950669. Eimer, WA; Kumar, D; Kumar, N; Breakefield, XO; Tanzi, RE; Moir, RD (2018). "Alzheimer's Disease-Associated b-Amyloid Is Rapidly Seeded by Herpesviridae to Protect against Brain Infection". Neuron. 99 (1): 1–9. doi:10.1016/j.neuron.2018.06.030. PMC 6075814. PMID 30001512.
Sources: en.wikipedia.org
The Napoleonic wars also played a key role in the independence of the Latin American colonies from Spain and Portugal. The conflict weakened the authority and military power of Spain, especially after the Battle of Trafalgar. There were many uprisings in Spanish America, leading to the wars of independence. In Portuguese America, Brazil experienced greater autonomy as it now served as seat of the Portuguese Empire and ascended politically to the status of Kingdom. These events also contributed to the Portuguese Liberal Revolution in 1820 and the Independence of Brazil in 1822. The century of relative transatlantic peace, after the Congress of Vienna, enabled the "greatest intercontinental migration in human history" beginning with "a big spurt of immigration after the release of the dam erected by the Napoleonic Wars." Immigration inflows relative to the US population rose to record levels (peaking at 1.6 percent in 1850–1851), as 30 million Europeans relocated to the United States between 1815 and 1914. Another concept emerged from the Congress of Vienna—that of a unified Europe. After his defeat, Napoleon deplored the fact that his dream of a free and peaceful "European association" remained unaccomplished. Such a European association would share the same principles of government, system of measurement, currency and Civil Code. One-and-a-half centuries later, and after two world wars several of these ideals re-emerged in the form of the European Union.
=== MeSH D12.644.456 – oligopeptides === MeSH D12.644.456.050 – amanitins MeSH D12.644.456.073 – angiotensins MeSH D12.644.456.073.021 – angiotensin i MeSH D12.644.456.073.041 – angiotensin ii MeSH D12.644.456.073.041.050 – angiotensin amide MeSH D12.644.456.073.041.800 – saralasin MeSH D12.644.456.073.041.815 – 1-sarcosine-8-isoleucine angiotensin ii MeSH D12.644.456.073.055 – angiotensin iii MeSH D12.644.456.073.070 – angiotensinogen MeSH D12.644.456.120 – antipain MeSH D12.644.456.193 – bradykinin MeSH D12.644.456.193.400 – kallidin MeSH D12.644.456.241 – caerulein MeSH D12.644.456.270 – chalones MeSH D12.644.456.300 – delta sleep-inducing peptide MeSH D12.644.456.345 – dipeptides MeSH D12.644.456.345.159 – anserine MeSH D12.644.456.345.190 – aspartame MeSH D12.644.456.345.331 – carnosine MeSH D12.644.456.345.360 – enalapril MeSH D12.644.456.345.360.300 – enalaprilat MeSH D12.644.456.345.575 – glycylglycine MeSH D12.644.456.345.600 – lisinopril MeSH D12.644.456.400 – n-formylmethionine leucyl-phenylalanine MeSH D12.644.456.448 – glutathione MeSH D12.644.456.448.500 – glutathione disulfide MeSH D12.644.456.448.750 – s-nitrosoglutathione MeSH D12.644.456.460 – gonadorelin MeSH D12.644.456.460.150 – buserelin MeSH D12.644.456.460.315 – goserelin MeSH D12.644.456.460.480 – leuprolide MeSH D12.644.456.460.600 – nafarelin MeSH D12.644.456.460.800 – triptorelin MeSH D12.644.456.580 – leupeptins MeSH D12.644.456.650 – netropsin MeSH D12.644.456.716 – pentagastrin MeSH D12.644.456.724 – pepstatins MeSH D12.644.456.726 – peptichemio MeSH D12.644.456.729 – peptide t MeSH D12.644.456.735 – phalloidine MeSH D12.644.456.745 – thyrotropin-releasing hormone MeSH D12.644.456.800 – tachykinins MeSH D12.644.456.800.354 – eledoisin MeSH D12.644.456.800.475 – kassinin MeSH D12.644.456.800.500 – neurokinin a MeSH D12.644.456.800.550 – neurokinin b MeSH D12.644.456.800.745 – physalaemin MeSH D12.644.456.800.866 – substance p MeSH D12.644.456.805 – technetium tc 99m mertiatide MeSH D12.644.456.810 – teprotide MeSH D12.644.456.830 – tetragastrin MeSH D12.644.456.835 – thymic factor, circulating MeSH D12.644.456.840 – tuftsin MeSH D12.644.456.925 – vasopressins MeSH D12.644.456.925.100 – argipressin MeSH D12.644.456.925.100.250 – deamino arginine vasopressin MeSH D12.644.456.925.325 – felypressin MeSH D12.644.456.925.480 – lypressin MeSH D12.644.456.925.700 – ornipressin MeSH D12.644.456.925.730 – oxytocin MeSH D12.644.456.925.940 – vasotocin
=== G04BE Drugs used in erectile dysfunction === G04BE01 Alprostadil G04BE02 Papaverine G04BE03 Sildenafil G04BE04 Yohimbin G04BE05 Phentolamine G04BE06 Moxisylyte G04BE07 Apomorphine G04BE08 Tadalafil G04BE09 Vardenafil G04BE10 Avanafil G04BE11 Udenafil G04BE30 Combinations G04BE52 Papaverine, combinations
== Sponsorship and philanthropy == In 1972, Church's Chicken sponsored The San Antonio Church's Fried Chicken Inc. First International Chess Tournament, with a first prize of $4,000, resulting in the strongest chess tournament in the United States in 50 years. From 1979 to 1986, Church's Chicken sponsored the ChessCafe Grand Prix tournaments, under the auspices of the United States Chess Federation. Church's Partners Foundation, Inc. is a 501(c)(3) charity that supports the employees of franchisees of Church's Chicken, their families and their communities. The foundation awards $1,000 scholarships to American high school students through their Church's Scholars Program and awarded over $227,000 worth of scholarships in the 2018–2019 academic year. Church's Chicken has partnered with No Kid Hungry since 2016.
Sources: en.wikipedia.org
Legal status varies by country. It is not approved as a medicine, and it is prohibited in sport. Some jurisdictions restrict import, sale, or possession.
Laboratories use liquid chromatography-tandem mass spectrometry to detect GW501516 and its metabolites. Urine is commonly tested, and testing can occur in and out of competition.
No, cardarine is not a SARM. It is a PPARδ agonist, which acts on a different receptor. The two classes are often confused in online discussions.
Anti-doping and clinical laboratories commonly use liquid chromatography-tandem mass spectrometry. The method can identify GW501516 and its metabolites in urine or blood. Detection depends on sample timing and the amount present.