This is a working overview of fatty acid oxidation, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
Early clinical research explored GW501516 for lipid disorders, obesity, and diabetes. Some short-term human studies reported changes in HDL cholesterol, LDL cholesterol, and triglycerides. The development program was discontinued after rodent studies showed dose-dependent tumor formation in multiple tissues, including liver, bladder, stomach, and skin. These findings raised concerns about long-term cancer risk in humans. Because human exposure data are limited, the clinical significance of the rodent tumors remains uncertain.
Literature on cardarine often separates receptor pharmacology from toxicology. Mechanistic papers describe PPARδ activation and gene expression changes, while safety assessments focus on carcinogenicity and species differences. Questions remain about whether rodent tumors arise through PPARδ-dependent or off-target mechanisms. Another open area is how human metabolism and exposure compare with those in animal studies. Analytical methods such as liquid chromatography–mass spectrometry are used to confirm identity in biological and product samples.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Visual description for typical solid reference material. |
| Solubility | Poorly soluble in water; soluble in DMSO | Solubility depends on solvent, purity, and form. |
| Storage | Cool, dry, protected from light | Long-term storage often uses low temperature and desiccant. |
| Common analytical method | LC-MS/MS | Used for detection and quantification in biological matrices. |
| Common synonyms | GW-501516; GW501516; endurobol | Naming varies among literature, vendors, and databases. |
Safety discussions about cardarine frequently cite rodent carcinogenicity findings reported in the 2000s. In those studies, treated animals developed tumors at multiple sites, leading sponsors to discontinue clinical development. The relevance of these findings to humans has not been resolved, but they are a major reason the compound is not approved. Current literature emphasizes uncertainty about long-term effects and the risks of unregulated use. Regulators and health agencies have not established a safe human exposure level.
Cardarine is a synthetic compound also known as GW501516, GW-501516, and sometimes endurobol. It was developed as a selective agonist of peroxisome proliferator-activated receptor delta, a nuclear receptor involved in fatty acid oxidation and energy metabolism. The compound was studied in preclinical models for metabolic and cardiovascular conditions, but it did not become a marketed human medicine. In regulatory and anti-doping contexts, it is treated as a prohibited substance rather than a licensed medicine.
Safety concerns emerged from long-term animal studies. In rodents given the compound for extended periods, researchers found an increased incidence of certain cancers, including liver and bladder tumors. These findings contributed to the discontinuation of clinical development. Whether similar risks apply to short-term or low-level exposure in humans is not established, and controlled human safety data are limited. The relevance of high-dose rodent carcinogenicity findings to human use remains a subject of debate.
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.
Assam Asimov (アサム・アシモフ, Asamu Ashimofu) and Mugi Grafton (ムギ・グラフトン, Mugi Gurafuton): Two of Reidlich's underlings who work undercover in S.P.D.'s Earth unit as Neo Deka Red (ネオデカレッド, Neo Deka Reddo) and Neo Deka Yellow (ネオデカイエロー, Neo Deka Ierō), respectively, and appear exclusively in the direct-to-video anniversary special Tokusou Sentai Dekaranger: 10 Years After. After failing to kidnap Carrie and being defeated by Deka Blue, Green, Yellow, and Pink, Reidlich forcibly converts Asimov and Grafton into energy to power his Neo Hyper Muscle Gear. Assam Asimov and Mugi Grafton are portrayed by Rakuto Tochihara (栩原 楽人, Tochihara Rakuto) and Mizuho Hata (秦 瑞穂, Hata Mizuho), respectively. Clementian Carrie (クレメント星人キャリー, Kuremento Seijin Kyarī): A girl from Planet Clement, whose inhabitants can enter the bodies of others for concealment, who appears exclusively in the direct-to-video anniversary special Tokusou Sentai Dekaranger: 10 Years After. Two years prior, she and her father accidentally stumbled onto Kruger discovering Kight Reidlich's corruption. After Reidlich killed Carrie's father, Kruger told Carrie to find his team. She went into hiding before eventually coming to Earth in the present. Upon finding the Dekarangers, they escort her to Planet Gowashichoru before confronting Reidlich. Carrie is portrayed by Rino Kobayashi (小林 里乃, Kobayashi Rino). Rui Edogawa (江戸川 塁, Edogawa Rui): A rookie S.P.D.
Their boat became increasingly crowded with both people and creatures.Humboldt observed the behavior and intelligence of his animals, especially the titi monkeys, which displayed childlike expressions and intelligence. Despite the inconvenience, the animals provided diversion from constant insect attacks. The next day, the group stopped at Culimacari rock, where Humboldt made precise astronomical observations. This confirmed the Casiquiare’s position and its function as the world’s only natural canal linking two major river systems, the Orinoco and the Amazon. The Casiquiare’s existence had long been denied in Europe, though local knowledge and previous Spanish exploration had already established its reality. Departing Culimacari early on 12 May, the expedition faced a strong current and slow progress. At the mission of Mandavaca, Humboldt found a missionary who spoke of his isolation and the small, scattered Native population. He also described acts of violence and cannibalism among the local peoples, which Humboldt later confirmed through conversation with a Native assistant. The journey along the Casiquiare became increasingly difficult. Food was scarce, and the group survived on ants and dry cacao mixed with river water. Spirits remained intact as the expedition neared the Orinoco. On 20 May, a jaguar carried off their dog during the night, causing distress. On 21 May the party rejoined the Orinoco, now able to travel downstream toward Angostura. Humboldt predicted commercial importance for the Casiquiare, but this vision was never realized.
== Use as a dietary supplement == Citicoline is available as a supplement in over 70 countries under a variety of brand names: CereBleu, Cebroton, Ceraxon, Cidilin, Citifar, Cognizin, Difosfocin, Hipercol, NeurAxon, Nicholin, Sinkron, Somazina, Synapsine, Startonyl, Trausan, Xerenoos, etc. When taken as a supplement, citicoline is hydrolyzed into choline and cytidine in the intestine. Once these cross the blood–brain barrier, they are reformed into citicoline by the rate-limiting enzyme in phosphatidylcholine synthesis, CTP-phosphocholine cytidylyltransferase.
== Animal models == Current research on synthetic platelets primarily in preclinical phases of clinical trials, relying on animal models to test their safety, efficacy, and hemostatic performance in relevant therapeutic areas. In one study, researchers evaluated the efficacy of platelet-mimicking procoagulant nanoparticles (PPNs) using various animal models. In a mouse model of thrombocytopenia, induced by administering an anti-CD42b antibody to reduce platelet counts, PPNs were introduced and demonstrated a reduction in bleeding comparable to that achieved with syngeneic platelet transfusions. Additionally, in a rat model of acute liver injury and a mouse model of hemorrhagic trauma, treatment with PPNs led to decreased blood loss and improved survival rates compared to control groups receiving saline or control nanoparticles. These findings suggest that PPNs effectively mimic natural platelet functions, enhancing hemostasis in scenarios of significant bleeding.
Sources: en.wikipedia.org
https://www.bioinformatics.nl/tools/pam.html Website that calculates a PAM matrix for any level. https://ftp.ncbi.nih.gov/repository/blocks/unix/blosum/MDM/ for PAM matrices from 1992 (PAM80, 120, 160, 210, 250 calculated using the "pam" program and PAM250 from Gonnet, Cohen & Benner 1992) https://www.ncbi.nlm.nih.gov/IEB/ToolBox/C_DOC/lxr/source/data/ for PAM30, PAM70, and PAM250 in the NCBI C Toolkit. https://github.com/ncbi/ncbi-cxx-toolkit-public/tree/main/src/util/tables for the same tables in the NCBI C++ Toolkit. https://ftp.ncbi.nih.gov/blast/matrices/ NCBI "Bonus Matrices" for BLAST, includes PAM10–500 and many other matrices. Also includes the source code for the "pam" program, which multiplies the data from Dayhoff to extrapolate other PAM values. Later derivations of PAM-type matrices:
The relatively low pressure that exerts the lifting force against the piston is about the same as the air pressure in automobile tires. Hydraulics is employed by modern devices ranging from very small to enormous. For example, there are hydraulic pistons in almost all construction machines where heavy loads are involved. Other applications:
An entrée or main course, typically full meals consisting of preserved and nonperishable precooked meat, vegetables, legumes, grains, rice, or staple foods; dehydrated soup or broth may also be offered, often in the form of bouillon cubes Side dishes or appetizers such as crackers or biscuits, spreads (commonly cheese spread, peanut butter, jam or jelly, chocolate spread, or pâté), pickles, or preservable salad (usually potato salad, tuna salad, or fruit salad) Desserts or snacks such as candy, chocolate, dried fruits, nuts, cookies, cakes, pastries, cereal bars, or energy bars Drink mixes, commonly juice, powdered milk, instant coffee, instant tea, hot chocolate, energy drinks, protein drinks, or soft drinks Food supplements such as condiments, chewing gum, dietary supplements, and water purification tablets Tableware, typically mess kits and eating utensils (usually a single multipurpose utensil like a spoon, spork, chopsticks, or lusikkahaarukka) Additional items provided for personnel to use for themselves, such as multipurpose paper, napkins or tissue paper, toilet paper, matches, cigarettes (historically), and solid fuel Field rations may come in different varieties, or carry multiple meals, for breakfast, lunch, dinner, or supper. Vegetarian, vegan, and religious diet variants may be available if a military's demographics necessitate them.
A group of individuals who share a common trait, such as birth year. In medicine, a cohort is a group that is part of a clinical trial or study and is observed over a period of time. (NCI) In epidemiology, a group of individuals with some characteristics in common. (NLM) Cohort study
In spite of the Amazon "Soy Moratorium", soy production continues to play a significant role in deforestation when its indirect impacts are taken into account, as land used to grow soy continues to increase. This land either comes from pasture land (which increasingly supplants forested areas), or areas outside the Amazon not covered by the moratorium, such as the Cerrado region. Roughly one-fifth of deforestation can be attributed to expanding land use to produce oilseeds, primarily for soy and palm oil, whereas the expansion of beef production accounts for 41%. The main driver of deforestation is the global demand for meat, which in turn requires huge tracts of land to grow feed crops for livestock. Around 80% of the global soybean crop is used to feed livestock.
Sources: en.wikipedia.org
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.
Most methods use liquid chromatography with tandem mass spectrometry. Urine is common in anti-doping testing, and blood or plasma may be used in research.
Typical guidance is cool, dry, dark storage, often at low temperature and with desiccant. Stability data are limited, so storage conditions should be verified for each batch or supplier.
It targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not act primarily on androgen receptors. This distinction separates it from SARMs.