Everything below concerns pharmacopeial specification. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Regulatory treatment of collagen peptides varies by country and intended use. In the United States, they are typically marketed as dietary supplements or food ingredients, and certain uses may be generally recognized as safe (GRAS) through self-affirmation or notification. In the European Union, collagen peptides from approved animal sources are considered food, not novel foods, if they have a history of consumption. Health claims linking collagen peptides to joint or skin benefits are not approved in the US or EU. Labeling must list the animal source and may state the protein content.
Manufacturing collagen peptides begins with collagen-rich raw materials such as bovine hide, porcine skin, fish scales, or poultry cartilage, which undergo washing, size reduction, and pretreatment to remove non-collagen proteins and fats. Extraction may use acid, alkali, or heat. Hydrolysis then breaks the collagen into smaller peptides, often with enzymes such as pepsin, papain, or alcalase. Process conditions of time, temperature, pH, and enzyme dose determine the final molecular weight distribution. After hydrolysis, the solution is filtered, concentrated, and dried into powder.
Molecular weight distribution is a key characteristic of collagen peptide preparations and influences solubility, viscosity, and absorption behavior. Low-molecular-weight fractions, often below 3,000 daltons, dissolve readily and may pass through intestinal barriers more efficiently than larger fragments. Higher-molecular-weight fractions can form viscous solutions and may retain some gel-like properties. Analytical techniques such as size exclusion chromatography reveal a broad distribution rather than a single peak. The average molecular weight is frequently reported, but the range and proportions of different sizes vary by manufacturer and process.
Collagen peptides are short chains of amino acids derived from collagen, the main structural protein in connective tissues. They are produced by hydrolysis, which breaks the triple-helical structure of native collagen into smaller fragments. The resulting peptides typically have molecular weights between 2,000 and 10,000 daltons, though commercial preparations vary. Unlike intact collagen, these peptides are water-soluble and do not form gels at room temperature. The term "collagen peptide" often refers to a mixture of fragments rather than a single defined molecule.
| Property | Value | Notes |
|---|---|---|
| Protein content | ≥90% (dry basis) | Determined by Kjeldahl or Dumas; varies by grade |
| Moisture | ≤10% | Higher moisture reduces shelf life and promotes clumping |
| Heavy metals | Lead ≤2 mg/kg; arsenic ≤1 mg/kg | Limits vary by jurisdiction; tested by ICP-MS |
| Microbial limits | Total aerobic count ≤10^4 CFU/g | Typical specification for food-grade powders |
| Labeling | Hydrolyzed collagen or collagen peptides | Source animal must be declared in many markets |
Storage and handling of collagen peptides require protection from moisture, heat, and light. The powders are hygroscopic and can absorb water from the air, leading to clumping or microbial growth. Typical storage conditions are a cool, dry place at room temperature or below, in tightly sealed containers. Some manufacturers recommend refrigeration for long-term stability. Solutions prepared from the powder are less stable and should be used promptly or preserved according to validated protocols.
Production of collagen peptides begins with raw materials such as bovine hide, porcine skin, fish scales, or poultry cartilage. The collagen is extracted, often with acid or alkaline treatment, and then subjected to hydrolysis using enzymes like pepsin or alcalase, or chemical agents. Enzymatic hydrolysis is favored for its mild conditions and controllability. The resulting mixture is filtered, concentrated, and dried to yield a powder. Process parameters such as temperature, pH, and enzyme-to-substrate ratio determine the molecular weight profile and yield.
Analytical methods for collagen peptides focus on molecular weight distribution, amino acid composition, and purity. Size exclusion chromatography with UV detection is widely used to estimate molecular weight ranges. High-performance liquid chromatography can quantify hydroxyproline after acid hydrolysis. Mass spectrometry provides detailed sequence information for individual peptides. Other tests include moisture content, ash, heavy metals, and microbial limits. The choice of method depends on the specific quality attribute and the required sensitivity.
Collagen peptides are distinguished from gelatin by their lower average molecular weight and better solubility in cold water. Gelatin forms gels upon cooling, while collagen peptides typically do not. Molecular weight distributions for commercial collagen peptides often range from about 2 to 20 kilodaltons, though exact profiles vary by manufacturer and process. Products may be sold as powders, capsules, or liquids. The term "collagen hydrolysate" is frequently used as a synonym, although labeling conventions differ across regions.
Collagen is a structural protein found in connective tissues of animals, and collagen peptides are short amino acid chains produced by hydrolyzing native collagen into smaller fragments. The hydrolysis process typically uses enzymes or acids under controlled conditions. Commercial collagen peptides often come from bovine hide, porcine skin, or fish scales. The resulting material is water-soluble and differs from intact collagen in molecular size and behavior. The term 'collagen peptide' generally refers to a mixture of peptide chains rather than a single defined molecule.
Production begins with cleaning and mincing raw collagen-rich tissues. The material undergoes pretreatment to remove non-collagenous components, followed by hydrolysis using enzymes such as pepsin or alcalase, or by acid or alkaline treatment. Reaction time, temperature, and pH influence the average molecular weight of the resulting peptides. After hydrolysis, the mixture is filtered, concentrated, and dried, often by spray drying. The final product is a powder with a characteristic amino acid profile rich in glycine, proline, and hydroxyproline.
Additional tests assess moisture, ash, and nitrogen content to confirm overall composition and processing consistency. Heavy metal analysis, including lead, arsenic, cadmium, and mercury, is performed to ensure limits are not exceeded. Microbial testing checks for total aerobic counts, yeast, mold, and specific pathogens such as Salmonella and Escherichia coli. These safety parameters are often required by regulations for food or dietary supplement ingredients. Results are compared against internal or pharmacopeial specifications, which may differ between jurisdictions.
One challenge in collagen peptide analysis is the absence of a single reference standard that covers all possible molecular weight fractions. Products from different sources or hydrolysis conditions yield different peptide profiles, complicating direct comparisons. Some laboratories use gelatin or a defined peptide mixture as a calibration standard, but this approach has limitations. Additionally, the term "collagen peptide" itself lacks a universally accepted molecular weight cutoff. Ongoing discussions aim to establish more consistent definitions and testing protocols for regulatory and research purposes.
Quality control of collagen peptides relies on methods that characterize molecular weight distribution, amino acid composition, and purity. Size exclusion chromatography (SEC) is commonly used to estimate the molecular weight profile of peptide mixtures. High-performance liquid chromatography (HPLC) can separate and quantify individual peptide fractions. Mass spectrometry provides detailed information on peptide sequences and modifications. These techniques help verify that a product meets declared specifications, though standardization across laboratories remains limited.
Collagen peptides are short chains of amino acids derived from collagen, a structural protein found in connective tissues such as skin, bone, and cartilage. The production process involves breaking native collagen into smaller fragments through hydrolysis, which cleaves peptide bonds. Unlike intact collagen, these peptides dissolve in water and do not form a triple helix. Commercial preparations typically contain peptides with molecular weights ranging from about 2,000 to 20,000 daltons. The term collagen peptide is often used interchangeably with hydrolyzed collagen or collagen hydrolysate.
Common sources for collagen peptide production include bovine hide, porcine skin, fish skin, and poultry cartilage. The raw material is first cleaned and then treated with enzymes such as pepsin or microbial proteases under controlled conditions. Hydrolysis time, temperature, and enzyme concentration influence the final peptide size distribution. After hydrolysis, the mixture undergoes filtration, purification, and drying to yield a powder. The amino acid composition is notable for high levels of glycine, proline, and hydroxyproline, which are characteristic of collagen.
Gibberellins (GAs) include a large range of chemicals that are produced naturally within plants and by fungi. They were first discovered when Japanese researchers, including Eiichi Kurosawa, noticed a chemical produced by a fungus called Gibberella fujikuroi that produced abnormal growth in rice plants. It was later discovered that GAs are also produced by the plants themselves and control multiple aspects of development across the life cycle. The synthesis of GA is strongly upregulated in seeds at germination and its presence is required for germination to occur. In seedlings and adults, GAs strongly promote cell elongation. GAs also promote the transition between vegetative and reproductive growth and are also required for pollen function during fertilization. Gibberellins breaks the dormancy (in active stage) in seeds and buds and helps increasing the height of the plant. It helps in the growth of the stem.
=== Independence and international reaction === The territory became nominally independent on 6 December 1977. Bophuthatswana's independence was not recognized by any government other than those of South Africa and Transkei, the first homeland to gain nominal independence. In addition, it was later internally recognized by the two additional countries within the TBVC-system, Ciskei and Venda.
Nana Mary's last appearance is midway through season nine, in which she finally has a heart-to-heart with Bev, thus closing the story on their relationship. Despite her absence, Mary appears at other family occasions, including the birth of her great-great-granddaughter. In the reboot and spin-off, D.J. and Geena's daughter is named after Nana Mary, who has since died.
== External links == PiHKAL ("Phenethylamines I Have Known And Loved") by Alexander "Sasha" Shulgin (1991) DOx - PsychonautWiki Category: DOX - Tripsitter DOx (psychedelics) - Wikipedia Massviews Analysis (Wikipedia Page Views of Individual DOx Drugs)
It is estimated that 6.1 million tonnes of uranium exists in ores that are economically viable at US$130 per kg of uranium, while 35 million tonnes are classed as mineral resources (reasonable prospects for eventual economic extraction). Australia has 28% of the world's known uranium ore reserves and the world's largest single uranium deposit is located at the Olympic Dam Mine in South Australia. There is a significant reserve of uranium in Bakouma, a sub-prefecture in the prefecture of Mbomou in the Central African Republic. Some uranium also originates from dismantled nuclear weapons. For example, in 1993–2013 Russia supplied the United States with 15,000 tonnes of low-enriched uranium within the Megatons to Megawatts Program. An additional 4.6 billion tonnes of uranium are estimated to be dissolved in sea water (Japanese scientists in the 1980s showed that extraction of uranium from sea water using ion exchangers was technically feasible). There have been experiments to extract uranium from sea water, but the yield has been low due to the carbonate present in the water. In 2012, ORNL researchers announced the successful development of a new absorbent material dubbed HiCap which performs surface retention of solid or gas molecules, atoms or ions and also effectively removes toxic metals from water, according to results verified by researchers at Pacific Northwest National Laboratory.
Sources: en.wikipedia.org
Peptide PHI, also known as peptide histidine isoleucine, is a peptide which functions as a hormone. This peptide contains a composition of 27 amino acids with histidine on the N-terminus and isoleucine on the C-terminus. It was originally isolated from the mammalian small intestine amongst mammalian neurons called intramural neurons which function in the motor activity of the intestinal walls. An example of this was revealed in a study that demonstrated that this peptide regulates water and electrolyte transportation in the human jejunum; similar to its inhibitory effects on fluid absorption in the small intestine of pigs and rats. Peptide histidine isoleucine (PHI) is part of family that plays a vital role in the cell growth rate such as in the intestine as well as in brain. It was derived from glucagon family called the pituitary adenylate cyclase-activating polypeptide (PACAP) and it has an amino acid sequence homology to vasoactive intestinal peptide, secretin, glucagon, and other growth hormone releasing factor. Human studies have shown that the release of PHI into the stomach regulates the neuroendocrine cell processes that affect gastrointestinal physiology. This peptide is present within the central nervous system that help regulate food consumption behavior, while at peripheral nervous system this peptide accumulates in the stomach which controls the digestion of food. It also plays a role in the regulation of prolactin in humans.
For the idea, that the Germans are the chosen people and have the right to use any and all means to subordinate the "inferior" people, has been expressed over and over again by historians, philosophers, and politicians and finally the Nazis tried to translate it into fact... The best people among the English and Americans wish that the best Germans would understand that there should be a definitive break with this tradition, which has brought the entire world and Germany itself the greatest misfortune. And as a small sign of German understanding the name of the KWS should be changed. What's in a name, if it is a matter of the existence of Germany and thereby Europe? In September 1946, a new Max Planck Society was established at Bad Driburg in the British Zone. On 26 February 1948, after the US and British zones were fused into Bizonia, it was dissolved to make way for the Max Planck Society, with Hahn as the founding president. It took over the 29 institutes of the former Kaiser Wilhelm Society that were located in the British and American zones. When the Federal Republic of Germany (or West-Germany) was formed in 1949, the five institutes located in the French zone joined them. The KWIC, now under Strassmann, built and renovated new accommodation in Mainz, but work proceeded slowly, and it did not relocate from Tailfingen until 1949. Hahn's insistence on retaining Telschow as the general secretary nearly caused a rebellion against his presidency.
== Structure == Hyaluronic acid is a polymer of disaccharides, which are composed of D-glucuronic acid and N-acetyl-D-glucosamine, linked via alternating β-(1→4) and β-(1→3) glycosidic bonds. Hyaluronic acid can be 25,000 disaccharide repeats in length. Polymers of hyaluronic acid can range in size from 5000 to 20000000 Da in vivo. The average molecular weight in human synovial fluid is 3–4 million Da, and hyaluronic acid purified from human umbilical cord is 3,140,000 Da; other sources mention average molecular weight of 7 million Da for synovial fluid. Hyaluronic acid was once thought to contain silicon, but this was later found to be from contamination in the processing. Hyaluronic acid is energetically stable, in part because of the stereochemistry of its component disaccharides. Bulky groups on each sugar molecule are in sterically favored positions, whereas the smaller hydrogens assume the less-favorable axial positions. Hyaluronic acid in aqueous solutions self-associates to form transient clusters in solution. While it is considered a polyelectrolyte polymer chain, hyaluronic acid does not exhibit the polyelectrolyte peak, suggesting the absence of a characteristic length scale between the hyaluronic acid molecules and the emergence of a fractal clustering, which is due to the strong solvation of these molecules.
Often in the continuation of this anaerobic exercise, the product from this metabolic mechanism builds up in what is called lactic acid fermentation. Lactate is produced more quickly than it is being removed and it serves to regenerate NAD+ cells on where it's needed. During intense exercise when oxygen is not being used, a high amount of ATP is produced and pH levels fall causing acidosis or more specifically lactic acidosis. Lactic acid build up can be treated by staying well-hydrated throughout and especially after the workout, having an efficient cool down routine and good post-workout stretching. Intense activity can cause significant and permanent damage to bodily tissues. In order to repair, vitamin E and other antioxidants are needed to protect muscle damage. Oxidation damage and muscle tissue breakdown happens during endurance running so athletes need to eat foods high in protein in order to repair these muscle tissues. It is important for female endurance runners to consume proper nutrients in their diet that will repair, fuel, and minimize fatigue and injury. To keep a female runner's body performing at its best, the ten nutrients need to be included in their diets.
Smoking has become less popular, but is still a large public health problem globally. Worldwide, smoking rates fell from 41% in 1980 to 31% in 2012, although the actual number of smokers increased because of population growth. In 2017, 5.4 trillion cigarettes were produced globally, and were smoked by almost 1 billion people. Smoking rates have leveled off or declined in most countries, but are increasing in some low- and middle-income countries. The significant reductions in smoking rates in the United States, United Kingdom, Australia, Brazil, and other countries that implemented strong tobacco control programs have been offset by increasing consumption in low income countries, especially China. The Chinese market now consumes more cigarettes than all other low- and middle-income countries combined. Other regions are increasingly playing larger roles in the growing global smoking epidemic. The WHO Eastern Mediterranean Region (EMRO) now has the highest growth rate in the cigarette market, with more than a one-third increase in cigarette consumption since 2000. Due to its recent dynamic economic development and continued population growth, Africa presents the greatest risk in terms of future growth in tobacco use. Within countries, patterns of cigarette consumption also can vary widely. For example, in many of the countries where few women smoke, smoking rates are often high in males (e.g., in Asia). By contrast, in most developed countries, female smoking rates are typically only a few percentage points below those of males.
Sources: en.wikipedia.org
T1-mapping (notably used in cardiac magnetic resonance imaging) T2-mapping Quantitative susceptibility mapping (QSM) Quantitative fluid flow MRI (i.e. some cerebrospinal fluid flow MRI) Magnetic resonance elastography (MRE) Magnetic resonance fingerprinting (MRF) Quantitative MRI aims to increase the reproducibility of MR images and interpretations, but has historically require longer scan times. Quantitative MRI (or qMRI) sometimes more specifically refers to multi-parametric quantitative MRI, the mapping of multiple tissue relaxometry parameters in a single imaging session. Efforts to make multi-parametric quantitative MRI faster have produced sequences which map multiple parameters simultaneously, either by building separate encoding methods for each parameter into the sequence, or by fitting MR signal evolution to a multi-parameter model.
Artificially created antimatter is usable only as an energy storage medium, not as an energy source, unless future technological developments (contrary to the conservation of the baryon number, such as a CP violation in favor of antimatter) allow the conversion of ordinary matter into anti-matter. Theoretically, humans may be able to cultivate and harvest a number of naturally occurring sources of antimatter in the future. Renewable energy by converting sunlight into electricity – either directly through solar cells and concentrating solar power, or indirectly through biofuels, wind, and hydroelectric power: There is no known way for a human civilization to harness the equivalent of the Earth's total absorbed solar energy without completely covering the surface with man-made structures, which is not feasible with current technology. However, if a civilization constructed very large space-based solar power satellites, Type I power levels might become achievable—these could convert sunlight to microwave power and beam it to collectors on Earth.
It has been reported that marine yeasts are able to produce many bioactive substances, such as amino acids, glucans, glutathione, toxins, enzymes, phytase, and vitamins with potential applications in the food, pharmaceutical, cosmetic, and chemical industries as well as for marine culture and environmental protection. Marine yeast was successfully used to produce bioethanol using seawater-based media which will potentially reduce the water footprint of bioethanol.
Campbeltown, a small western coastal town, was once home to over 30 distilleries but now has only three in operation: Glen Scotia, Glengyle, and Springbank. Characteristics vary, but in general, the whiskies are described as "fruity, peaty, sweet, smoky" by the national tourist board; another source published by a marketing company also mentions the "flavor of wet dog, also called wet wool". The Highlands: The Highlands is by far the largest region in Scotland both in area and in whisky production. This massive area has over 30 distilleries on the mainland. Region characteristics: "fruity, sweet, spicy, malty", according to the national tourist board. When the Islands sub-region is included, the total number of distilleries is 47. Some Highland distilleries: Fettercairn, Aberfeldy, Edradour, Balblair, Ben Nevis, Dalmore, Glen Ord, Glenmorangie, Oban, Glendronach, Old Pulteney, Tullibardine and Tomatin. The Islands, an unrecognised sub-region of the Highlands, includes all of the whisky-producing islands other than Islay: Arran, Jura, Mull, Orkney, Raasay and Skye: with their respective distilleries: Arran, Jura, Highland Park, Scapa, Raasay, Talisker and Tobermory. Islay : has nine producing distilleries: Ardbeg, Ardnahoe (the most recent), Bowmore (the oldest, having opened in 1779), Bruichladdich, Bunnahabhain, Caol Ila, Kilchoman, Lagavulin, and Laphroaig. Region Characteristics: distilleries in the south make whisky which is "medium-bodied ... saturated with peat-smoke, brine and iodine" because they use malt that is heavy with peat as well as peaty water.
=== Hypnotic === Chloral hydrate has not been approved by the FDA in the United States nor the EMA in the European Union for any medical indication and is on the FDA list of unapproved drugs that are still prescribed by clinicians. Usage of the drug as a sedative or hypnotic may carry some risk given the lack of clinical trials. However, chloral hydrate products, licensed for short-term management of severe insomnia, are available in the United Kingdom. Chloral hydrate was voluntarily removed from the market by all manufacturers in the United States in 2012. Prior to that, chloral hydrate may have been sold as a "legacy" or "grandfathered" drug; that is, a drug that existed prior to the time certain FDA regulations took effect and therefore, some pharmaceutical companies have argued, has never required FDA approval. New drugs did not have to be approved for safety until Congress passed the Federal Food, Drug, and Cosmetic Act (the "FD&C Act") in 1938. Further, a new drug did not have to be proven effective until 1962, when Congress amended the Act. Manufacturers contend that such "legacy drugs", by virtue of the fact that they have been prescribed for decades, have gained a history of safety and efficacy. Chloral hydrate was used for the short-term treatment of insomnia and as a sedative before minor medical or dental treatment. It was largely displaced in the mid-20th century by barbiturates and subsequently by benzodiazepines.
Sources: en.wikipedia.org
Size-exclusion chromatography is the standard method, often with refractive index or ultraviolet detection. Calibration uses known protein standards. SDS-PAGE can provide a rough range but is less precise.
No. In most countries they are regulated as food ingredients or dietary supplements. They cannot carry claims to treat or prevent disease.
Dry powder should be kept in sealed containers at ambient temperature, away from moisture and direct sunlight. High humidity can cause clumping and microbial growth. Liquid formulations may require refrigeration.
No, collagen peptides are shorter fragments produced by hydrolysis, while native collagen retains its triple-helical structure. The hydrolysis process breaks the protein into smaller, water-soluble chains. This difference affects solubility, gel formation, and how the material behaves in formulations.