The short version of LC-MS/MS fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-08-08. Anything still debated is marked as such rather than presented as settled.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
Laboratory studies have examined GW501516 in cell cultures and rodents for conditions such as dyslipidemia, insulin resistance, and obesity. Some trials in humans were initiated, but development was discontinued after preclinical findings raised concerns about cancer in certain models. Those findings do not prove that the compound causes cancer in people, but they contributed to regulatory caution. Later reviews often describe the evidence as preliminary and insufficient for assessing long-term safety.
In the fitness and bodybuilding literature, cardarine is frequently discussed as an endurance agent or fat-loss compound, although such claims are not supported by robust clinical evidence. Online descriptions often mix animal data, user anecdotes, and marketing language. Researchers who study PPARδ agonists distinguish between receptor activation in controlled experiments and unsupervised use of unverified products. The latter introduces unknown purity, dose, and interactions, making reported experiences difficult to interpret scientifically.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human therapeutic use | No marketing authorization identified in major jurisdictions. |
| Anti-doping class | PPARδ agonist; hormone and metabolic modulators | Listed on the WADA Prohibited List. |
| Common test matrix | Urine | Also blood and tissue in research settings. |
| Typical analytical method | LC-MS/MS | Targets parent compound and metabolites. |
| Major safety signal | Tumor findings in rodents | Human relevance not established; limited human data. |
Cardarine is a common name for GW501516, an investigational compound developed in the 1990s for metabolic conditions. It acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in lipid and energy metabolism. The compound is frequently mislabeled as a selective androgen receptor modulator, or SARM, but its molecular target is different. GW501516 reached early clinical testing before development was discontinued. It has no approved therapeutic use in any country. The name cardarine is not a formal international nonproprietary name.
Regulatory treatment varies, but cardarine is not approved as a medicine. Sports authorities list GW501516 as a prohibited substance, and it is banned at all times under the World Anti-Doping Agency code. Many countries restrict sales for human consumption, while online vendors market it as a research chemical. Such products may lack purity data, and their actual contents can differ from the label. Purchasing or possessing cardarine may carry legal consequences depending on jurisdiction. The compound is not a dietary supplement ingredient in regulated markets.
Clinical development stopped after rodent studies showed tumors at multiple sites. Whether those findings predict human cancer risk remains an open question, but they led sponsors to discontinue programs. Human safety data are limited to small, short-term studies that were not designed to assess cancer risk. Reported effects in those studies included changes in blood lipids, but the evidence is insufficient for medical use. Long-term consequences of nonmedical use are not well characterized. Questions about dose, duration, and individual susceptibility remain unresolved.
Laboratory detection of cardarine typically involves sample preparation followed by chromatographic separation and mass spectrometric identification. Urine is the most common matrix for anti-doping tests, though blood and hair have also been explored. Methods can target the parent compound or its metabolites, depending on the expected window of detection. Reference standards are required for accurate quantification. Matrix effects and dilution can influence results, so laboratories use internal standards and validation protocols. The exact detection window varies with dose, route, and individual metabolism.
A common misconception is that cardarine has been proven safe for human use. In reality, human clinical data are limited, and long-term animal studies have raised concerns about cancer. Another misconception is that it is a supplement or vitamin-like compound. It is a synthetic research chemical with no approved medical indication. Scientific discussion often focuses on its mechanism and detection rather than therapeutic use. Regulatory and anti-doping literature treats it primarily as a prohibited substance.
Cardarine is explicitly prohibited by the World Anti-Doping Agency under the class of PPARδ agonists. Its presence in urine or blood samples can be detected using mass spectrometry-based methods, often liquid chromatography-tandem mass spectrometry. Athletes who test positive may face sanctions, including bans from competition. The compound is also regulated as a prescription-only or unapproved drug in many countries. Enforcement varies by jurisdiction, and some regions treat it as a controlled substance. Online sales may occur despite these restrictions, creating quality and legal risks.
The neuroendocrine system is the mechanism by which the hypothalamus maintains homeostasis, regulating metabolism, reproduction, eating and drinking behaviour, energy utilization, osmolarity and blood pressure. The regulation of metabolism, is carried out by hypothalamic interconnections to other glands. Three endocrine glands of the hypothalamic–pituitary–gonadal axis (HPG axis) often work together and have important regulatory functions. Two other regulatory endocrine axes are the hypothalamic–pituitary–adrenal axis (HPA axis) and the hypothalamic–pituitary–thyroid axis (HPT axis). The liver also has many regulatory functions of the metabolism. An important function is the production and control of bile acids. Too much bile acid can be toxic to cells and its synthesis can be inhibited by activation of FXR a nuclear receptor.
Nanoparticles can also be formed using radiation chemistry. Radiolysis from gamma rays can create strongly active free radicals in solution. This relatively simple technique uses a minimum number of chemicals. These including water, a soluble metallic salt, a radical scavenger (often a secondary alcohol), and a surfactant (organic capping agent). High gamma doses on the order of 104 gray are required. In this process, reducing radicals will drop metallic ions down to the zero-valence state. A scavenger chemical will preferentially interact with oxidizing radicals to prevent the re-oxidation of the metal. Once in the zero-valence state, metal atoms begin to coalesce into particles. A chemical surfactant surrounds the particle during formation and regulates its growth. In sufficient concentrations, the surfactant molecules stay attached to the particle. This prevents it from dissociating or forming clusters with other particles. Formation of nanoparticles using the radiolysis method allows for tailoring of particle size and shape by adjusting precursor concentrations and gamma dose.
White Paper on Full Employment in Australia (1945) – defined economic policy for 30 years Reserve Bank Act 1959 s 10 NAIRU reporting Fiscal policy Full employment and industrial policy Unemployment insurance Workforce Australia, Employment Services Act 1994
== English translations == Robert Potter, 1781 - verse: full text Michael Wodhull, 1782 – verse Edward P. Coleridge, 1891 – prose: full text Theodore Alois Buckley, 1892 – prose: full text Gilbert Murray, 1912 – verse: full text Arthur S. Way, 1912 – verse F. L. Lucas, 1924 – verse Augustus T. Murray, 1931 – prose Countee Cullen, 1935 Moses Hadas and John McLean, 1936 – prose R. C. Trevelyan, 1939 – verse Rex Warner, 1944 – verse Robinson Jeffers, 1946 – verse Ray Mathew, 1953 – verse Peter D. Arnott, 1961 – verse Philip Vellacott, 1963 Rush Rehm, 1973 - prose John Davie, 1996 James Morwood, 1997 – prose Paul Roche, 1998 – verse Ruby Blondell, 1999 – verse George Theodoridis, 2004 – prose: full text Stephen Esposito, 2004 – verse Joseph Goodrich, 2005 – verse: full text Graham Kirby, 2006 – verse (The Bloomsbury Theatre) Diane Arnson Svarlien, 2008 – verse Robin Robertson, 2008 – verse J. Michael Walton, 2008 – prose Ian C. Johnston, 2008 – verse: full text Tom Paulin, 2010 - full text Judith Mossman (classicist), 2011 – prose Brian Vinero, 2012 – rhymed verse: full text Mike Bartlett, 2012 – play Diane Rayor, 2013 David Stuttard, 2014 – prose Alan Chriztopher R. Aranza, 2015 – prose Rachel Kitzinger, 2016 – verse Charles Martin, 2019 Dr. Richard W. Swanson, 2020 – prose Michael Ewans, 2022 – verse
Sources: en.wikipedia.org
Reconstructions of rainfall amount in the tropics in the geological past are mostly based on δ18O of speleothems or δD of biogenic lipids, both of which are thought of as proxies for the isotopic composition of precipitation.
The proportions [given by Webb] indicate that this might have been a squid-like form, and not an Octopus. The "breadth" is evidently that of the softened and collapsed body, and would represent an actual maximum diameter in life of at least 7 feet and a probable weight of 4 or 5 tons for the body and head. These dimensions are decidedly larger than those of any of the well-authenticated Newfoundland specimens. It is perhaps a species of Architeuthis. Verrill soon changed his mind about the identity of the creature. In the January 3 issue of the New York Herald, he wrote that the carcass was indeed that of a giant octopus. However, the paper did not state that Verrill was the author of the article. The article read:
== Fourier transform mass spectrometry == Fourier transform ion cyclotron resonance mass spectrometry was developed by Alan G. Marshall and Melvin B. Comisarow at the University of British Columbia in 1974. The inspiration was earlier developments in conventional ICR and Fourier Transform Nuclear Magnetic Resonance (FT-NMR) spectroscopy.
Sources: en.wikipedia.org
=== Green algal derived chloroplasts === Green algae have been taken up by many groups in three or four separate events. Primarily, secondary chloroplasts derived from green algae are in the euglenoids and chlorarachniophytes. They are also found in one lineage of dinoflagellates and possibly the ancestor of the CASH lineage (cryptomonads, alveolates, stramenopiles and haptophytes) Many green algal derived chloroplasts contain pyrenoids, but unlike chloroplasts in their green algal ancestors, storage product collects in granules outside the chloroplast.
=== Political changes === The revolution brought Romania vast attention from the outside world. Initially, much of the world's sympathy went to the FSN government under Ion Iliescu, a former member of the CPR leadership and a Ceaușescu ally prior to falling into the dictator's disfavour in the early 1980s. The FSN, composed mainly of former members of the second echelon of the CPR, immediately assumed control over the state institutions, including the main media outlets such as the national radio and television networks. They used their control of the media to launch attacks against their political opponents, newly created political parties that claimed to be successors to those existing before 1948. Around the same time, all Romanian numbers stations ceased transmitting, including a number station called "Ciocârlia/The Skylark", also known as "V01" after the revolution. Much of that sympathy was squandered during the Mineriads. Massive protests erupted in downtown Bucharest as political rallies organised by the opposition parties during the presidential elections, with a small part of the protesters deciding to stand ground even after Iliescu was re-elected with an overwhelming majority of 85%. Attempts by police to evacuate the remaining protesters resulted in attacks on state institutions, prompting Iliescu to appeal to the country's workers for help. Infiltrated and instigated by former Securitate agents, in the following days a large mass of workers, mainly miners, entered Bucharest and attacked and fought with anti-government protesters and gathered bystanders.
==== Other sensory methods ==== There are a variety of other chemical sensors for measuring glucose. Given the importance of glucose analysis in the life sciences, numerous optical probes have also been developed for saccharides based on the use of boronic acids, which are particularly useful for intracellular sensory applications where other (optical) methods are not or only conditionally usable. In addition to the organic boronic acid derivatives, which often bind highly specifically to the 1,2-diol groups of sugars, there are also other probe concepts classified by functional mechanisms which use selective glucose-binding proteins (e.g. concanavalin A) as a receptor. Furthermore, methods were developed which indirectly detect the glucose concentration via the concentration of metabolized products, e.g. by the consumption of oxygen using fluorescence-optical sensors. Finally, there are enzyme-based concepts that use the intrinsic absorbance or fluorescence of (fluorescence-labeled) enzymes as reporters.
== History == There were suggestions in the scientific literature as early as 1956 that trans fats could cause an increase in coronary artery disease. Studies in the early 1990s brought renewed scrutiny and confirmation of the negative health impact of trans fats. In 1994, it was estimated that trans fats caused at least 20,000 deaths annually in the U.S. from heart disease. In the 1990s, activist organization Center for Science in the Public Interest (CSPI) called for reducing trans fats in foods, and later lobbied for them to be disclosed on product labels and menus. Several lawsuits were launched against high-visibility restaurants and food manufacturers with the objective of supporting a broader phase-out of trans fats. Mandatory food labeling was introduced in several countries and Denmark was first to mandate limits on industrially produced trans fats in 2004. In January 2007, faced with the prospect of an outright ban on the sale of their product, Crisco was reformulated to meet the U.S. Food and Drug Administration (FDA) definition of "zero grams trans fats per serving" (that is less than one gram per tablespoon, or up to 7% by weight; or less than 0.5 grams per serving size) by boosting the saturation and then diluting the resulting solid fat with unsaturated vegetable oils. Noting that elimination of industrially produced trans fat is feasible and achievable, the World Health Organization (WHO) has set a goal to make the world free from industrially produced trans fat by the end of 2023.
Sources: en.wikipedia.org
No. Cardarine has not received approval for human therapeutic use in major jurisdictions. It remains an investigational compound.
It is classified as a PPARδ agonist on the WADA Prohibited List. Anti-doping laboratories can detect it and its metabolites in urine. Its use is banned in competition and usually out of competition.
Rodent studies reported increased tumor incidence at multiple sites. The human relevance remains uncertain, but the findings contributed to discontinuation of development. No long-term human cancer data are available.
It binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.