Everything below concerns LC-MS/MS. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-11-04. Where a claim depends on a specific study, the study is described rather than over-claimed.
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
Laboratory studies indicate that GW501516 activates PPARδ, a nuclear receptor involved in fatty acid oxidation and energy metabolism. In rodent experiments, treated animals often showed increased endurance and reduced fat mass. These effects were observed under controlled conditions and do not establish safe or effective use in humans. The exact dose-response relationship in humans remains poorly characterized. Species differences in metabolism can affect how results translate across animals and people.
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.
Anti-doping laboratories identify GW501516 and related metabolites using liquid chromatography coupled with tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be analyzed. The method targets the parent compound and phase I and phase II metabolites, which extend the detection window. Because the substance is prohibited at all times, athletes can be tested outside competition. Detection limits and windows depend on the assay, sample type, and individual metabolism.
| Property | Value | Notes |
|---|---|---|
| Primary target | PPARδ (NR1C2) | Nuclear receptor involved in lipid metabolism |
| Preclinical effect | Increased fatty acid oxidation | Observed in rodent studies |
| Key safety signal | Tumors in rodents after long-term exposure | Contributed to halted clinical development |
| Human trial status | No approved product; development stopped | Limited short-term metabolic data |
| Sport regulatory status | Prohibited at all times | WADA hormone and metabolic modulators class |
Published literature on cardarine includes in vitro assays, rodent experiments, and a small number of human studies. Reports describe effects on exercise capacity and lipid metabolism in animals, while human evidence is sparse. Many online descriptions present the compound as a proven endurance aid, a claim not supported by regulatory approval or large clinical trials. Analytical studies focus on identifying the parent compound and its metabolites in biological samples. Important uncertainties include species differences, dose-response relationships, and the relevance of rodent tumor findings to humans.
Cardarine is the common name for GW501516, a synthetic compound studied as a peroxisome proliferator-activated receptor delta agonist. Researchers developed it to explore treatments for lipid disorders and metabolic conditions. It is not an approved medicine in any country. Early clinical work examined changes in HDL cholesterol and triglycerides, but development was discontinued after animal studies raised concerns about cancer. The compound remains available as a research chemical and appears in discussions of performance enhancement.
At the molecular level, GW501516 binds and activates PPARδ, a nuclear receptor that regulates transcription. Activation shifts expression of genes involved in fatty acid oxidation, energy expenditure, and lipid transport in skeletal muscle and liver. Animal studies report increased endurance and altered lipid profiles after exposure. Human data are limited to small trials and do not establish long-term safety or efficacy. PPARδ also has roles in cell proliferation, so the relationship between activation and cancer risk remains an open question.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
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.
Hops are the female flower clusters or seed cones of the hop vine Humulus lupulus, which are used as a flavouring and preservative agent in nearly all beer made today. Hops had been used for medicinal and food flavouring purposes since Roman times; by the 7th century in Carolingian monasteries in what is now Germany, beer was being made with hops, though it isn't until the thirteenth century that widespread cultivation of hops for use in beer is recorded. Before the thirteenth century, beer was flavoured with plants such as yarrow, wild rosemary, and bog myrtle, and other ingredients such as juniper berries, aniseed and ginger, which would be combined into a mixture known as gruit and used as hops are now used; between the thirteenth and the sixteenth century, during which hops took over as the dominant flavouring, beer flavoured with gruit was known as ale, while beer flavoured with hops was known as beer. Some beers today, such as Fraoch by the Scottish Williams Bros Brewing Company and Cervoise Lancelot by the French Brasserie Lancelot, use plants other than hops for flavouring. Hops contain several characteristics that brewers desire in beer: they contribute a bitterness that balances the sweetness of the malt; they provide floral, citrus, and herbal aromas and flavours; they have an antibiotic effect that favours the activity of brewer's yeast over less desirable microorganisms; and they aid in "head retention", the length of time that the foam on top of the beer (the beer head) will last.
Muscle fatigue is when muscles that were initially generating a normal amount of force, then experience a declining ability to generate force. It can be a result of vigorous exercise, but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction. There are two main causes of muscle fatigue: the limitations of a nerve's ability to generate a sustained signal (neural fatigue); and the reduced ability of the muscle fiber to contract (metabolic fatigue). Muscle fatigue is not the same as muscle weakness, though weakness is an initial symptom. Despite a normal amount of force being generated at the start of activity, once muscle fatigue has set in and progressively worsens, if the individual persists in the exercise they will eventually lose their hand grip, or become unable to lift or push with their arms or legs, or become unable to maintain an isometric position (such as plank). Other symptoms may accompany such as myalgia (muscle pain), shortness of breath, fasciculations (muscle twitching), myokymia (muscle trembling), and muscle cramps during exercise; muscle soreness may occur afterwards. An inappropriate rapid heart rate response to exercise may be seen, such as in the metabolic myopathy of McArdle disease (GSD-V), where the heart tries to compensate for the deficit of ATP in the skeletal muscle cells (metabolic fatigue) by increasing heart rate to maximize delivery of oxygen and blood borne fuels to the muscles for oxidative phosphorylation.
However, the functional importance of CSP proteins in olfaction/chemosensing remains to be proved. Since then, this protein gene family has been proved to act outside the chemosensory system [32]. They were called pherokines to designate proteins in abundance in the fly hemolymph in response to microbial or viral infection [33]. It was even proposed to rename these proteins to cuticular sensory proteins to keep the name but to emphasize on their expression level not only in sensory organs, but also in the immune barriers between the insect and the environment [49-50]. An email forum was organized to find most suitable new name considering the growing evidence that CSPs do not play a central and unique role in chemosensing, if any [32]. The term “CSP” has grown and is taken to mean belonging to a group of soluble proteins with a particular four-cysteine pattern and a high level of structural similarity [4, 14, 23-36, 32-37, 50]. The term “CSP” is rather unsuitable especially to designate the whole protein gene family because it means literally “Chemosensory Proteins” [3]. This term should not be used to unite under a common name all genes and proteins that are related in an evolutionary context from bacteria to honeybees. The knowledge to name the CSPs properly comes now with this thorough analysis of sea crustaceans, arthropod, bacteria and insect genome and Expressed Sequence Tag (EST) databases in the continuity of molecular data that demonstrate that CSPs are not exclusively tuned to olfactory/taste chemosensory organs [4, 14, 23-36, 32-37, 50].
reversible reaction A chemical reaction that can proceed in either direction depending on the reaction conditions, i.e. from reactants to products or from products to reactants, especially implying one in which both conversions occur simultaneously. Contrast irreversible reaction.
== Critical considerations and actual trends == Some major drawbacks of the common protocols for the in-gel digestion are the extended time needed and the multiple processing steps, making the method error-prone with respect to contaminations (especially keratin). These disadvantages were largely removed by the development of optimised protocols and specialised reaction tubes. More severe than the difficulties with handling are losses of material while processing the samples. The mass spectrometric protein analysis is often performed at the limit of detection, so even small losses can dictate success or failure of the whole analysis. These losses are due to washout during different processing steps, adsorption to the surface of reaction tubes and pipette tips, incomplete extraction of peptides from the gel and/or bad ionisation of single peptides in the mass spectrometer. Depending on the physicochemical properties of the peptides, losses can vary between 15 and 50%. Due to the inherent heterogeneity of the peptides, up to now, a universally valid solution for this major drawback of the method has not been found.
Sources: en.wikipedia.org
UHBR 10 (Ultra High Bit Rate 10): 10.0 Gbit/s bandwidth per lane UHBR 13.5 (Ultra High Bit Rate 13.5): 13.5 Gbit/s bandwidth per lane UHBR 20 (Ultra High Bit Rate 20): 20.0 Gbit/s bandwidth per lane The total bandwidth of the main link in a standard 4-lane connection is the aggregate of all lanes:
The Australasian Proteomics Society (APS) is a learned society formed in 2004 from the Lorne Proteomics Symposia (LPS) meetings. The APS was expanded to include the Australian Electrophoresis and Proteomics Society (a society formed in 1994 in Sydney, Australia and originally called the Australian Electrophoresis Society, part of the International Council of Electrophoresis Societies). The Lorne Proteomics Symposia meetings can trace their roots to the original Specialist Protein Analysis Workshop (SPAW) founded by Robert L. Moritz and Richard J. Simpson. These meetings began in 1994 as an offshoot of the Lorne Protein Meeting. (established in 1974) to address the needs of protein purification and analysis technologies rapidly under development in the 1980s. The founding president and vice president were Simpson and Moritz. The current president is Stuart Cordwell. In 2004, an Australasia-wide committee was formed to fully disseminate the activities of the APS and provide a regional society to include New Zealand and other interested Asian countries to be a focal hub in the Pacific for the Human Proteome Organization. The aims of the APS are to promote and facilitate proteomics research and related topics. The APS acts a liaison body for communication with state and federal government as well as a central point for the coordination of proteome-related programmes and resources. The APS is a member of the Asia Oceania Human Proteome Organization.
== Production == Diglycerides are a minor component of many seed oils and are normally present at ~1–6%; or in the case of cottonseed oil as much as 10%. Industrial production is primarily achieved by a glycerolysis reaction between triglycerides and glycerol. The raw materials for this may be either vegetable oils or animal fats.
As these animals have faster metabolisms and much shorter lifespans than humans results from experiments are received sooner, speeding research. The 1997 discovery that mHTT fragments misfold led to the discovery of the nuclear inclusions they cause. These advances have led to increasingly extensive research into the proteins involved with the disease, potential drug treatments, care methods, and the gene itself. The networks of care and support that had developed in Venezuela and Colombia during the research projects there in the 1970s through 2000s were eventually eroded by various forces, such as the ongoing crisis in Venezuela and the death of a lead researcher in Colombia (Jorge Daza Barriga). Doctors are working toward rekindling these networks because the people who have contributed to the science of HD by participating in these studies deserve adequate follow-up care; societies elsewhere in the world who benefit from the scientific advances thus achieved owe at least that much to those who participated in the research. The condition was formerly called Huntington's chorea. The term was superseded by Huntington's disease because not all patients develop chorea; furthermore, cognitive and behavioral problems constitute a significant portion of HD symptomatology.
Phosphotungstic acid haematoxylin (PTAH) is a mix of haematoxylin with phosphotungstic acid, used in histology for staining. It stains some tissue in contrasting colors in a way similar to haematoxylin and eosin stain, as phosphotungstic acid binds to tissue proteins. It is used to show gliosis in the central nervous system, tumours of skeletal muscles, and fibrin deposits in lesions. Muscle is stained blue-black to dark brown, connective tissue is pale orange-pink to brownish red, fibrin and neuroglia stain deep blue, coarse elastic fibers show as purple, and bone and cartilage obtain yellowish to brownish red color. PTAH is ideal for demonstrating striated muscle fibers and mitochondria, often without a counterstain. As such, it is used to identify contraction bands, as seen in contraction band necrosis. PTAH can be helpful in diagnosing oncocytomas, infantile digital fibromas. PTAH stains ependymomas while it does not stain choroid plexus papillomas, providing one means of differentiating these tumors. This technique has been largely replaced by immunohistochemistry techniques.
Sources: en.wikipedia.org
Boron neutron capture therapeutics are pharmaceuticals intended for use to deliver boron-10 to cancerous cells as part of boron neutron capture therapy (BNCT). Boron-10 atoms strongly absorb neutrons to form a metastable state of boron-11, which undergoes α-decay. By accumulating boron-10 in cancerous cells and subjecting the tumor to neutron radiation, high-energy α particles are selectively delivered only to the target cells. This neutron bombardment results in the selective destruction of the tumor cells that the boron-10 was absorbed into. As of 2023, the technology is available in Japan only, and even there few implementations have been reported.
Stinky tofu is fermented tofu. Like blue cheese or durian, it has a very distinct, potent and strong smell, and is an acquired taste. Hard stinky tofu is often deep-fried and paired with soy sauce or salty spice. Soft stinky tofu is usually used as a spread on steamed buns. Doufuru is another type of fermented tofu that has a salty taste. Doufuru can be pickled together with soy beans, red yeast rice or chili to create different color and flavor. This is more of a pickled type of tofu and is not as strongly scented as stinky tofu. Doufuru has the consistency of slightly soft blue cheese, and a taste similar to Japanese miso paste, but less salty. Doufuru can be used as a spread on steamed buns, or paired with rice congee. Sufu is one other type of fermented tofu that goes through ageing process. The color (red, white, green) and flavor profile can determine the type of sufu it is. This kind of tofu is usually eaten alongside breakfast rice. Soybean milk is soybean-based milk. It is a morning beverage, and it has many benefits to human health.
== Terminology == Jammu and Kashmir is named after the two regions it encompasses: the Jammu region and the Kashmir Valley. India collectively refers to the parts of Kashmir under Pakistani administration as "Pakistan-occupied Kashmir" (POK), and considers the region corresponding to Azad Kashmir as part of Jammu and Kashmir. Pakistan collectively refers to the Indian-administered territories of Kashmir as "Indian-occupied Kashmir" (IOK) or "Indian-held Kashmir" (IHK). Neutral sources use "Indian-administered Kashmir"/"Pakistan-administered Kashmir" and "Indian-controlled Kashmir"/"Pakistan-controlled Kashmir" to demarcate the areas.
==== Common welfare concerns ==== Welfare in aquaculture can be impacted by a number of issues such as stocking densities, behavioural interactions, disease and parasitism. A major problem in determining the cause of impaired welfare is that these issues are often all interrelated and influence each other at different times. Optimal stocking density is often defined by the carrying capacity of the stocked environment and the amount of individual space needed by the fish, which is very species specific. Although behavioural interactions such as shoaling may mean that high stocking densities are beneficial to some species, in many cultured species high stocking densities may be of concern. Crowding can constrain normal swimming behaviour, as well as increase aggressive and competitive behaviours such as cannibalism, feed competition, territoriality and dominance/subordination hierarchies. This potentially increases the risk of tissue damage due to abrasion from fish-to-fish contact or fish-to-cage contact. Fish can suffer reductions in food intake and food conversion efficiency. In addition, high stocking densities can result in water flow being insufficient, creating inadequate oxygen supply and waste product removal. Dissolved oxygen is essential for fish respiration and concentrations below critical levels can induce stress and even lead to asphyxiation. Ammonia, a nitrogen excretion product, is highly toxic to fish at accumulated levels, particularly when oxygen concentrations are low.
Crustacean cardioactive peptide (CCAP) is a highly conserved, amidated cyclic nonapeptide with the primary structure PFCNAFTGC-NH2 (ProPheCysAsnAlaPheThrGlyCys-NH2) and a disulfide bridge between Cys3 and Cys9. It is found in crustaceans and insects where it behaves as a cardioaccelerator, neuropeptide transmitter for other areas of the nervous system and a hormone. CCAP was first isolated from the pericardial organs of the shore crab Carcinus maenas, where it has a role in regulating heartbeat. It was assumed that this was the peptide's main function and its name reflects this.
Sources: en.wikipedia.org
Rodent studies reported increased endurance and fat oxidation after GW501516 exposure. Long-term studies also found higher rates of some tumors, which led to halted development.
Small short-term human trials examined metabolic markers such as lipids and glucose. The trials did not continue after rodent cancer findings, so long-term human safety is unknown.
Controlled human trials have not established a performance benefit. Anecdotal reports exist, but they are not reliable evidence.
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.