Anchovies (Engraulidae family): Encyclopedic Reference
1. Identity, Taxonomy, and Natural Sources
Taxonomic Classification
Anchovies (family Engraulidae) belong to the order Clupeiformes and the suborder Clupeoidei. The genus Engraulis comprises nine extant species distributed worldwide in tropical and temperate coastal waters from 60°N to 43°S. Taxonomically, Engraulis belongs to the subfamily Engraulinae and is distinguished from other anchovy genera by the absence of pre- or post-pelvic scutes, a dorsal fin positioned at the midpoint of the body, and 27 to 45 slender gill rakers.
The genus Engraulis was formally established by Georges Cuvier in 1816 within his work Le Règne Animal, where he designated Clupea encrasicolus Linnaeus, 1758, as the type species, elevating it from earlier classifications under broader clupeid groupings. The recognized commercial species include E. anchoita (Argentine anchovy), E. australis (Australian anchovy), E. capensis (Southern African anchovy), and E. encrasicolus (European anchovy). Key commercially fished species in the Engraulidae family include the European anchovy (Engraulis encrasicolus), Californian anchovy (Engraulis mordax), Peruvian anchoveta (Engraulis ringens), and Japanese anchovy (Engraulis japonicus).
Physical Description and Habitat
The European anchovy (Engraulis encrasicolus) is a forage fish somewhat related to the herring; it lives off the coasts of Europe and Africa, including in the Mediterranean Sea, the Black Sea, and the Sea of Azov. These fish typically reach lengths of 9.5 to 24.8 cm, featuring elongated, slightly oval bodies with a prominent pointed snout, a short maxilla, and fine teeth on the lower jaw, adapted for filter-feeding on plankton. They are widely distributed across the world's major oceans, with most species inhabiting tropical and subtropical regions and a few found in temperate zones.
Common Forms and Preparations
Anchovies can be eaten raw, but they are typically smoked, salted, or packed in brine. One of the most common processing methods, which also leads to the strongest flavor, is gutting and curing them; salt is added to draw water and moisture out so that bacteria and microbes cannot thrive and spoil them. Anchovies are available in fresh, tinned or canned, salted, oiled, and paste forms. The strong taste people commonly associate with anchovies is due to the curing process; fresh anchovies, known in Italy as alici, have a much milder flavor.
A notable liquid derivative, colatura di alici, is produced by layering anchovies in wooden barrels with salt: the closest surviving European relative of ancient garum is colatura di alici, a golden fish sauce still made in the Italian coastal town of Cetara; producers layer anchovies in wooden barrels, press them under weights, and collect the concentrated liquid that drains out over roughly 13 months, producing a milder and more refined result than ancient garum.
2. Traditional and Historical Use
Ancient Greece and Rome: Garum
Garum is a fermented fish sauce that was used as a condiment in the cuisines of Phoenicia, ancient Greece, Rome, Carthage, and later Byzantium; a similar preparation known as liquamen was at times synonymous with it; although garum enjoyed its greatest popularity in the Western Mediterranean and the Roman world, it was in earlier use by the Greeks. The name comes from "garos," a small fish species the Greeks used to produce a salty condiment starting around the fifth century BC; the earliest references appear in lost plays by the Greek playwrights Cratinus and Sophocles; by the time Rome dominated the Mediterranean, garum had become a culinary staple that crossed every social class.
The preparation was conceptually simple: fatty fish—anchovies, sardines, mackerel, and offal from larger fish—were mixed with large quantities of salt and left to mature in the sun for weeks or months. Fish sauce was shipped to the city of Rome, northern Europe, the eastern Mediterranean, and to the armies in Croatia and northern Britain, supplied to soldiers as part of their rations. Hispanic garum amphorae have been found in archaeological sites in Rome, Gaul, and North Africa, which gives an idea of the market's size.
Like modern fermented fish sauce and soy sauce, garum was a rich source of umami flavoring due to the presence of glutamates. A concentrated garum evaporated down to a thick paste with salt crystals was called muria—packed with protein, amino acids, minerals, and B vitamins, not unlike today's soy sauce.
Many of the anchovy-based condiments used today, including colatura di alici and Worcestershire sauce, can trace their development back to the popularity and flavor characteristics of this ancient fermented condiment. Garum is believed to be the ancestor of the fermented anchovy sauce colatura di alici, still produced in Campania, Italy, as well as the fermented anchovy and sardine paste pissalat in the Nice region of France.
Mediterranean and Asian Culinary Traditions
Anchovies are especially popular in the Mediterranean diet, where they are consumed in a variety of dishes. The European anchovy can be fished from the shore with simpler gear such as beach seines, and it has been widely eaten for millennia. The tradition of salting and preserving fish dates back thousands of years, to when salt and fish were among the most prized ingredients for Phoenicians, Greeks, and Romans; fish was difficult to catch and highly perishable, while salt was one of the few available methods of preservation.
Southeast Asian fish sauces like Vietnamese nước mắm and Thai nam pla are arguably even closer in spirit to the original garum; they rely on the same core chemistry: small fish, salt, time, and heat, producing a liquid rich in glutamic acid.
3. Key Constituents and Active Compounds
Omega-3 Polyunsaturated Fatty Acids
With almost 1.96 g of omega-3 per 100 grams, anchovies are a significant source of this essential fatty acid and are among the best providers of omega-3 fatty acids among all foods. The omega-3 fatty acids of significance in human physiology include α-linolenic acid (ALA; 18:3), EPA (20:5), and DHA (22:6); ALA is an essential fatty acid obtained through plant-based sources, while EPA and DHA can theoretically be synthesized from ALA but this pathway is highly inefficient (less than 0.1–7.9% conversion to EPA and less than 0.1–3.8% to DHA), making intake of marine-derived EPA and DHA crucial for beneficial health effects.
Omega-3 fatty acids are divided into three main types—ALA, DHA, and EPA; while ALA is present in plant sources such as chia seeds, walnuts, or flaxseed oil, DHA and EPA are mainly found in fatty fish and seafood such as salmon, tuna, mackerel, and anchovies. Seafood varieties commonly consumed in the United States that are higher in EPA and DHA and lower in methylmercury include salmon, anchovies, sardines, Pacific oysters, trout, shrimp, crab, and flounder (USDA, 2023).
Protein and Amino Acid Profile
In the context of healthy dietary models, fish are significant due to their high omega-3 fatty acid content, as well as their essential amino acids (threonine, valine, methionine, isoleucine, arginine, tryptophan, leucine, phenylalanine, lysine, and histidine), vitamins (A, D, and B), and minerals (sodium, potassium, calcium, magnesium, phosphorus, iron, copper, iodine, and fluoride). Protein hydrolysates obtained from E. encrasicolus waste have been previously demonstrated to contain essential amino acids of high nutritional value.
Selenium
One serving of approximately five anchovies contains about 13.6 mcg of selenium; a typical 2-oz can of anchovies is considered about two servings and contains about 31 mcg of selenium; teens and adults should aim to get 55 mcg of selenium per day. Per 45 g serving, anchovies provide 36.5–37 µg of selenium, approximately 66% of the recommended daily allowance.
B-Group Vitamins
A 45 g serving of anchovies provides approximately 14 mg of niacin (vitamin B3), representing about 88% of the recommended daily allowance, along with 0.62 µg of vitamin B12 (about 26% RDA), which is vital for nerve and blood health.
Minerals: Calcium, Iron, Phosphorus, and Potassium
The calcium in anchovies comes from their soft, edible bones, giving them an edge over other fish in supporting bone mineral density. A standard small tin (approximately 45 g drained) provides about 147 mg of calcium, equivalent to 15% of the recommended daily allowance—higher than most fish. A 45 g serving also provides approximately 383 mg of potassium (11% RDA), which benefits cardiac function and muscle health, and 174 mg of phosphorus (25% RDA), which is essential for bones and energy production.
Bioactive Peptides
The anchovy (Engraulis encrasicolus) is known to produce high-value bioactive peptides under enzymatic hydrolysis, with nutraceutical potential only partially explored to date. Marine organisms are a valuable source of bioactive proteins and peptides that can act as potential nutraceuticals, improving human health and preventing diseases through antihypertensive, anticoagulant, antioxidant, and antiproliferative activities, as well as immunomodulating and lipid-lowering effects. An antimicrobial peptide (GLSRLFTALK), isolated from anchovy cooking wastewater, has been shown to inhibit many microorganisms including Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Shigella dysenteriae, Pseudomonas aeruginosa, Salmonella typhimurium, and Streptococcus pneumoniae.
Glutamates and Umami Compounds
Like modern fermented fish sauce and soy sauce, fermented anchovy preparations are a rich source of umami flavoring due to the presence of glutamates. The enzymatic breakdown of anchovy proteins during curing produces free glutamic acid and other flavor-active compounds, which accounts for the intense savory depth characteristic of anchovy-based condiments.
4. Mechanisms of Action
Omega-3 EPA and DHA: Cardiovascular and Metabolic Mechanisms
EPA and DHA operate via several mechanisms, all beginning with their incorporation into cell membranes. EPA and DHA modulate lipid metabolism, inflammation, platelet and endothelial function, the gut-heart axis, ion channels, and autonomic function via vagal tone, supporting cardiovascular health.
Omega-3 PUFAs have been shown in clinical settings to reduce triglycerides, blood pressure, and resting heart rate, and to improve endothelial dysfunction. This cardioprotective effect of EPA and DHA is most likely due to the beneficial modulation of a number of known risk factors for CVD, including blood lipids, blood pressure, heart rate and heart rate variability, platelet aggregation, endothelial function, and inflammation.
DHA and Neural Function
The n-3 long-chain PUFAs (LCPUFAs) are essential for fetal development and are key components of all cell membranes; especially in the brain and retina, both EPA and DHA serve as precursors of several metabolites that are potent lipid mediators.
Anchovy Protein Hydrolysates: Anti-Inflammatory and Anti-Atherosclerotic Mechanisms
A 12-week administration of 10% (w/w) anchovy protein hydrolysates (APH) in a high-fat diet produced a significant anti-obesity effect, improving lipid metabolism and reducing hepatic steatosis and liver damage in ApoE−/− mice; additionally, APH significantly produced anti-inflammatory and antioxidant effects, downregulating the expression of pro-inflammatory cytokines and modulating the expression of oxidative stress-related genes in the aorta and heart tissue.
Selenium: Antioxidant and Thyroid Mechanisms
The selenium content in anchovies plays a role in antioxidant defence and thyroid hormone production. A study from the 1990s highlighted selenium as part of an enzyme that can activate the thyroid; additional research suggests that selenium deficiency may lead to thyroid problems.
5. Scientific Evidence by Area of Health
5.1 Cardiovascular Health
Evidence strength: Moderate to strong for the omega-3 components; limited direct anchovy-specific human trials.
Long-term prospective cohort studies consistently demonstrate an association between higher intakes of fish, fatty fish, and marine n-3 fatty acids (EPA + DHA), or higher levels of EPA and DHA in the body, and lower risk of developing cardiovascular disease (CVD), especially coronary heart disease (CHD), myocardial infarction (MI), and cardiovascular mortality in the general population.
The best sources of omega-3 fatty acids are salmon, herring, anchovies, sardines, and rainbow trout. In the Vitamin D and Omega-3 Trial (VITAL), 840 mg/day of EPA and DHA resulted in a 28% reduced risk for heart attacks and a 50% reduced risk for fatal heart attacks.
One of the earliest and most influential studies, the GISSI-Prevenzione trial published in 1999, demonstrated a significant reduction in cardiovascular death, including sudden cardiac death, in post-MI patients who received 840 mg/day of EPA + DHA for 3.5 years; although it was an open-label study with no placebo, this trial laid the foundation for EPA and DHA therapy in secondary prevention.
Evidence for primary prevention of CVD through randomised controlled trials (RCTs) is relatively weak; however, in high-risk patients—especially in the secondary prevention setting (e.g., post-MI)—a number of large RCTs support the use of EPA + DHA (or EPA alone), confirmed through a recent meta-analysis. Importantly, evidence from RCTs indicates that high-dose omega-3 supplementation may be associated with an increase in atrial fibrillation (AF) risk.
In the Physician's Health Study, there was an inverse dose-dependent association of risk for sudden death across quartiles of whole blood EPA + DHA, with an 80% lower risk in those with the highest whole blood EPA + DHA concentration compared to those with the lowest.
For the selenium component specifically, a study published in the American Journal of Clinical Nutrition found that selenium, a nutrient found in anchovies, can lower the risk of heart disease; researchers found that a 50% increase in selenium blood concentration was associated with a 24% decreased risk of coronary heart disease.
5.2 Brain and Cognitive Health
Evidence strength: Preliminary to moderate; most mechanistic data from observational studies and in vitro/animal research; limited direct anchovy-specific human RCTs.
The n-3 LCPUFAs are essential for fetal development and are key components of all cell membranes; especially in the brain and retina, both EPA and DHA serve as precursors of several metabolites that are potent lipid mediators. In a Harvard Medical School study, researchers found that those who ate the most omega-3 fatty acids had lower levels of the protein beta-amyloid, which is a marker for Alzheimer's disease.
Maternal fish consumption before and during pregnancy is associated with improved neurodevelopment in infants and young children. The body of evidence associating regular fish consumption—including anchovy—with cognitive outcomes is largely observational; the extent to which anchovies specifically (as opposed to their omega-3 components) drive these effects has not been isolated in controlled human trials.
5.3 Anti-Inflammatory Effects
Evidence strength: Moderate for EPA/DHA-mediated inflammation reduction; preliminary for anchovy-specific hydrolysate data (animal/in vitro only).
Omega-3 plays a vital role in health, and human trials show that it has anti-inflammatory properties. Twelve-week administration of 10% (w/w) anchovy protein hydrolysates (APH) in a high-fat diet produced a significant anti-obesity effect, improving lipid metabolism and reducing hepatic steatosis and liver damage in ApoE−/− mice; additionally, APH significantly produced anti-inflammatory and antioxidant effects, downregulating the expression of pro-inflammatory cytokines and modulating the expression of oxidative stress-related genes. These animal findings have not yet been replicated in human clinical trials with anchovy protein hydrolysates specifically.
5.4 Cancer: Selenium and Omega-3 Associations
Evidence strength: Preliminary; largely based on epidemiological associations and the properties of individual nutrients (selenium, omega-3); no human RCTs specific to anchovy consumption and cancer outcomes.
Anchovies also have selenium, which, if eaten regularly, may reduce the risk of some types of cancer. Consuming fish has been shown to play a protective role in preventing cardiovascular disease, high cholesterol, and certain types of cancer. The cancer-related associations relate to the antioxidant properties of selenium and the anti-inflammatory action of omega-3 fatty acids; no interventional trials have established causation specifically for anchovy consumption and cancer incidence.
5.5 Anti-Atherogenic Activity (Protein Hydrolysates)
Evidence strength: Preclinical (animal studies) only; no confirmed human clinical data for anchovy protein hydrolysates.
Protein hydrolysates from fish by-products have been proven to promote various beneficial biological activities, including immunomodulatory, anti-inflammatory, hypocholesterolemic, antidiabetic, antihypertensive, antiatherogenic, and antioxidative effects, and their potential application in the prevention and treatment of human diseases is worthy of investigation. The main goal of one study was to assess the effect of the administration of protein hydrolysates from anchovy (Engraulis encrasicolus) waste for 12 weeks on attenuating high-fat diet-induced metabolic dysfunction-associated fatty liver disease (MAFLD) in ApoE−/− mice. Translation of these findings to human clinical benefit requires further controlled research.
5.6 Eye Health
Evidence strength: Preliminary; based primarily on observational data associating omega-3 intake with macular health.
Anchovies are considered important for eye health, as they contain eicosapentaenoic acid (EPA), a type of omega-3 fatty acid, which helps reduce the risk of macular degeneration, which can negatively affect vision. Studies show that diets rich in these types of omega-3 fatty acids can reduce the chances of developing macular degeneration, which can distort vision. These observations relate to the dietary omega-3 content of anchovies rather than to anchovies per se.
5.7 Weight Management and Satiety
Evidence strength: Indirect; based on the protein content of anchovies and general evidence for dietary protein's role in satiety.
A report published in the American Journal of Clinical Nutrition based on dietary fish as a major component of a weight-loss diet revealed that increased levels of protein in fish may help people feel satiated, which in turn prevents overeating, and additionally suppresses the production of ghrelin (the hunger hormone). According to USDA data, one serving of anchovies may contain 13 grams of protein.
5.8 Bone Health
Evidence strength: Preliminary; inferred from the calcium, phosphorus, and vitamin D content of anchovies.
The calcium in anchovies comes from their soft, edible bones, giving them an edge over other fish in supporting bone mineral density. The vitamins, proteins, and minerals found in anchovies may provide many health benefits, including helping to build strong bones and prevent osteoporosis and other bone conditions; the calcium and vitamin A found in anchovies might also help fight bone degradation. No clinical trials have directly assessed anchovy consumption as a therapeutic intervention for bone health outcomes.
6. Body Systems and Health Areas Associated with Anchovy Consumption
- Cardiovascular system: Anchovies are rich in omega-3 fatty acids, which offer powerful benefits for the heart; studies show they may reduce triglyceride levels, slow the buildup of plaque in the arteries, and reduce blood pressure, and may also lower the risk of stroke by reducing blood clotting.
- Nervous system and brain: Anchovies provide a highly bioavailable source of marine omega-3 fatty acids (EPA and DHA), which are critical for cardiovascular, cognitive, and inflammatory balance.
- Musculoskeletal system: The calcium found in anchovy's edible bones supports bone mineral density.
- Endocrine (thyroid) system: The selenium content in anchovies plays a role in antioxidant defence and thyroid hormone production.
- Immune and inflammatory pathways: Human trials show that omega-3 fatty acids found in anchovies have anti-inflammatory properties.
- Visual system: Anchovies contain EPA, which has been associated with reduced risk of macular degeneration.
- Haematopoietic system: Anchovies are packed with essential nutrients like calcium for strong bones, iron for oxygen transport, and selenium for immune and thyroid health, as well as vitamin B12 for brain function and phosphorus for cellular repair.
7. Dosage Forms and Quantities Reported in Studies
Dietary Forms
A typical serving size of anchovies is about 20 grams (approximately 4–5 fillets), providing around 42 calories, 5 grams of protein, and 700 mg of sodium. A standard small tin (approximately 45 g drained) provides about 0.7 g omega-3 EPA/DHA total per serving.
Omega-3 Reference Intakes
The FDA has approved up to 3,000 mg/day of EPA plus DHA from food and supplements as safe for the general population. As per the European Food Safety Authority, at least 250–500 mg of combined EPA and DHA—the two main components of omega-3 fatty acids present in seafood—can be consumed on a day-to-day basis. The dietary guidelines for Americans recommend a minimum intake of 250 mg EPA/DHA omega-3 per day; however, according to NHANES, the median intake across the United States is only 97 mg per day.
Clinical Trial Dosages (Omega-3)
In the GISSI-Prevenzione trial, post-MI patients received 840 mg/day of EPA + DHA for 3.5 years. In the VITAL trial, 840 mg/day of EPA and DHA was the interventional dose studied.
Preclinical Research Dosage (Anchovy Protein Hydrolysates)
In a murine study, 12-week administration of 10% (w/w) anchovy protein hydrolysates (APH) in a high-fat diet produced a significant anti-obesity effect. This animal-derived dosing figure has not been translated into a human clinical equivalent.
8. Safety Considerations and Known Interactions
Sodium Content
Anchovies are high in sodium (approximately 3,500 mg per 100 grams when cured), which can be a concern for individuals on a low-sodium diet or with high blood pressure. For individuals on sodium-restricted diets due to hypertension, heart failure, or kidney disease, vinegar-marinated "white anchovies" with lower sodium content are preferable; rinsing fillets can also reduce sodium load.
Purine Content and Gout
Anchovies fall in the high-purine category, similar to sardines and organ meats; purines break down into uric acid in the body, and for someone with gout or high uric acid levels, frequent servings of high-purine foods can raise the chance of painful flares. The British Society for Rheumatology recommends that patients with gout moderate their intake of high-purine foods, including anchovies and organ meats.
Fish Allergy
An anchovy allergy is a type of fish allergy that occurs when the immune system mistakenly identifies proteins in anchovies as harmful; the body releases chemicals like histamines, triggering allergic reactions; anchovy allergies are less common than shellfish allergies, but fish allergies—including anchovy allergy—are typically persistent throughout life. Being allergic to anchovies may also mean cross-reactivity with other types of fish.
Histamine Intolerance
Anchovies—especially cured varieties—may trigger symptoms in individuals with histamine intolerance; choosing ultra-fresh options or avoiding cured varieties reduces this risk. Cured and canned fish can accumulate histamine if storage conditions are inadequate, which can trigger flushing, hives, or stomach upset in sensitive people even without a classic allergy.
Mercury and Heavy Metal Exposure
Because anchovies are small, fast-growing fish low on the food chain, they naturally have minimal mercury or heavy-metal accumulation compared to larger fish species. The USDA (2023) identifies anchovies among seafood varieties that are higher in EPA and DHA and lower in methylmercury.
Pregnancy and Breastfeeding
Anchovies are a low-mercury choice during pregnancy and breastfeeding. Maternal fish consumption before and during pregnancy is associated with improved neurodevelopment in infants and young children. High sodium intake from cured anchovies warrants attention in populations with pregnancy-related hypertension.
Atrial Fibrillation Risk at High-Dose Omega-3 Supplementation
Evidence from RCTs indicates that high-dose omega-3 supplementation may be associated with an increase in atrial fibrillation (AF) risk. This concern applies primarily to pharmacological omega-3 supplement doses and is not established at the dietary levels achieved by ordinary anchovy consumption.
References
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