Anserine: Physiology and What Research Reports

What anserine is

Anserine is a naturally occurring histidine-containing dipeptide: beta-alanyl-N-pi-methyl-L-histidine, in other words the methylated structural relative of carnosine. Chemically it consists of two amino acid residues joined by a single peptide bond, which places it at the smallest end of the peptide spectrum — far shorter than the 20-40 residue research peptides that dominate most peptide literature, and closer in behaviour to a small metabolite than to a receptor-binding signalling peptide.

Its name comes from the Latin anser (goose), reflecting its early identification in bird muscle. Anserine is generally described as one of the endogenous imidazole dipeptides, a family that also includes carnosine and balenine, all built around beta-alanine and a histidine (or methylhistidine) residue.

Where anserine is produced and where it is found

Biochemically, the imidazole dipeptides are synthesised inside muscle tissue: beta-alanine and histidine are joined by carnosine synthase, and carnosine can then be methylated on the imidazole ring to yield anserine. The distribution across species is uneven. Anserine is typically the dominant imidazole dipeptide in the skeletal muscle of many birds and fish, while human skeletal muscle is usually described as carnosine-dominant. For that reason, anserine reaches the human body largely through diet — poultry and fish muscle, and the chicken-breast or fish-derived extracts frequently used as the starting material in imidazole-dipeptide research.

Functions attributed to imidazole dipeptides

The physiological interest in this dipeptide family rests on a handful of chemical properties that are described consistently across the biochemistry literature:

• pH buffering in contracting muscle, because the imidazole ring has a pKa close to intracellular physiological range;
• metal ion handling, through chelation of divalent cations;
• quenching of reactive carbonyl species, including methylglyoxal, a dicarbonyl that appears directly in the anserine sepsis literature, where researchers reported that anserine reduced mortality in experimental sepsis by preventing methylglyoxal-induced capillary leakage (PMID 40107203);
• antioxidant and anti-glycation activity in cell-free and cell-based systems.

How anserine is measured and studied

Because anserine is a small, water-soluble molecule, it is generally separated and quantified by chromatographic methods (HPLC or LC-MS/MS) in muscle homogenates, plasma and urine, where it is measured alongside carnosine, 1-methylhistidine and related metabolites. Study designs in the verified literature fall into three broad categories:

1. Cell models. A 2023 study in human skeletal muscle cells reported that l-anserine increased muscle differentiation and muscle contractility in that in vitro system (PMID 37255271).
2. Animal disease models. Mouse and rat work has examined anserine in sepsis (PMID 40107203), in ApoE-knockout atherosclerosis (PMID 40735873) and in deep vein thrombosis (PMID 38846090).
3. Human supplementation studies. A 2023 report examined the effect of long-term carnosine/anserine supplementation on iron regulation after a prolonged running session (PMID 37583074), an example of the combined carnosine-plus-anserine preparations commonly used in exercise science.

What the literature reports

The published anserine record is dominated by preclinical models, and the findings below are reported as study outcomes in those specific systems rather than as established clinical effects in people.

A recurring theme across the newer work is the endothelial and barrier angle: the sepsis study framed anserine's benefit around capillary leakage driven by methylglyoxal (PMID 40107203), while the methylmalonic aciduria study looked at oxidative stress together with cell barrier integrity (PMID 40998969). Two of the cardiovascular papers approached different endpoints — plaque and lipid handling in ApoE-knockout mice (PMID 40735873) and thrombus formation in a DVT model (PMID 38846090).

Why the same word appears in unrelated places

Readers searching the term often land on literature that has nothing to do with the dipeptide, because anserine ("goose-like") is also used anatomically and dermatologically:

• Pes anserine bursitis — inflammation at the medial knee where the sartorius, gracilis and semitendinosus tendons insert in a goose-foot pattern, reviewed as a musculoskeletal entity (PMID 30422536), with a 2022 report describing poor accuracy of clinical diagnosis in pes anserine tendinitis bursitis syndrome (PMID 35070151) and a case description of snapping pes anserine syndrome (PMID 24380407).
• Anserine folliculosis — a skin finding, reported in a 2025 case of traumatic anserine folliculosis (PMID 41552257).
• Potentilla anserina L. — a plant, whose polysaccharide was studied for protection against cadmium-induced neurotoxicity (PMID 35066145), and which is botanically unrelated to the muscle dipeptide.

Safety and tolerability: what studies report

The verified literature summarised here is weighted toward mechanism and efficacy endpoints in cells and animals rather than toward systematic safety characterisation; the human supplementation report in runners was framed around iron regulation after prolonged running rather than around adverse events (PMID 37583074). No adverse-event profile can be drawn from titles and abstracts of preclinical model studies, and none is asserted here. This page is for educational purposes only and is not medical advice; consult a licensed physician about any health question or any substance discussed in the research literature.

Why it matters to peptide readers

Anserine is a useful reference point for three reasons. First, it illustrates that "peptide" spans everything from a two-residue endogenous metabolite to large synthetic analogues, and that pharmacology differs accordingly. Second, it shows how carbonyl-scavenging chemistry can be tested as a therapeutic hypothesis, as researchers did when linking anserine to methylglyoxal-driven capillary leakage in sepsis (PMID 40107203). Third, it is a reminder to read the model: a finding in cultured human muscle cells (PMID 37255271) or in knockout mice (PMID 40735873) describes that system, not a clinical outcome.

Limitations of the current evidence

• Most reported outcomes come from animal or cell models, not controlled human trials.
• Human work often uses combined carnosine/anserine preparations, making the individual contribution of anserine difficult to isolate (PMID 37583074).
• Endpoints differ widely across papers — mortality, plaque, thrombus, barrier integrity, immune crosstalk (PMID 42385859) — so results are not directly comparable.
• Terminology overlap with pes anserine structures and with Potentilla anserina can distort casual literature searches.

References

• l-Anserine Increases Muscle Differentiation and Muscle Contractility in Human Skeletal Muscle Cells (Journal of Agricultural and Food Chemistry, 2023)
• Anserine reduces mortality in experimental sepsis by preventing methylglyoxal-induced capillary leakage (EBioMedicine, 2025)
• Anserine alleviates atherosclerosis in ApoE(-/-) mice by regulating lipid metabolism (Journal of the Science of Food and Agriculture, 2025)
• Exploration on the effect of anserine on the alleviation of DVT and its molecular mechanism (Frontiers in Pharmacology, 2024)
• Anserine restores antibacterial immunity in cirrhosis via a protective CCL5-mediated hepatocyte-CD44(+)pDC crosstalk (Journal of Hepatology, 2026)
• Effects of anserine on oxidative stress and on cell barrier integrity in methylmalonic aciduria (Scientific Reports, 2025)
• Effect of long-term carnosine/anserine supplementation on iron regulation after a prolonged running session (Physical Activity and Nutrition, 2023)
• Pes Anserine Bursitis (StatPearls, 2026)
• Poor Accuracy of Clinical Diagnosis in Pes Anserine Tendinitis Bursitis Syndrome (Indian Journal of Orthopaedics, 2022)
• Snapping pes anserine syndrome (Journal of Orthopaedic and Sports Physical Therapy, 2014)
• Traumatic Anserine Folliculosis: A Case Report (Cureus, 2025)
• Potentilla anserine L. polysaccharide protects against cadmium-induced neurotoxicity (Environmental Toxicology and Pharmacology, 2022)