Beef (cow) liver: per 100 g cooked beef liver provides large amounts of protein (~20 g), iron (~4–5 mg), and very high vitamin A (reports from USDA-derived summaries quote ~16,000 IU/100 g), plus hundreds of micrograms of B12. Beef liver also contains substantial cholesterol (often reported in the high hundreds of mg per 100 g).
Chicken liver: also nutrient-dense but generally lower in vitamin A per 100 g than beef liver; it is a rich source of iron (multiple data sources list ~6–9 mg/100 g depending on preparation) and high in cholesterol as well. Chicken liver is lower in calories and sometimes lower in total fat versus beef liver depending on cut and cookingGoat liver: less commonly tabulated in U.S. databases but, like other mammal livers, it is high in iron, B vitamins and vitamin A — often comparable with beef liver on a per-100 g basis. Regional nutritional write-ups indicate goat liver can supply enough iron for most adult males in a 100 g serving
Chicken liver — softer, milder, and often used in pâtés, spreads (e.g., Jewish chopped liver), sautéed dishes, and sauces. Its relatively mild taste makes it popular in Western and Middle Eastern home cooking.Stronger, denser, and more tangy/metallic in flavor is beef liver.It’s featured in many traditional European, Middle Eastern and Asian dishes (liver and onions, kebda eskandarani, liver pâtés) and prized for rustic, hearty preparations. TasteAtlas and other culinary sources document many iconic beef-liver recipes globally.Goat liver — used in cuisines where goat is a common protein (South Asia, parts of Africa, Caribbean). It resembles other mammal livers in flavor but can carry regional seasonings and spice blends; it’s often curried, grilled, or used in stews.Correcting or preventing deficiency: liver is an efficient source of bioavailable iron and vitamin B12, nutrients often targeted in anemia prevention and treatment. Non-heme iron from plants is not as well absorbed as heme iron from the liver. Studies and food composition data confirm liver’s high heme-iron content relative to common meats. Vitamin A and growth/vision: The liver's preformed version of vitamin A aids in cellular differentiation,immunological response, and vision. For people with vitamin A deficiency, liver can markedly improve status when consumed in controlled amounts.Micronutrient density in small servings: because nutrients are concentrated, modest portions (e.g., 50–100 g once or twice weekly) can deliver substantial daily needs for several vitamins and minerals.
Portion and frequency: For most healthy adults a small portion (e.g., 50–100 g) of liver once weekly provides nutrients without regularly exceeding recommended vitamin A limits. Pregnant people should either avoid liver or limit it to very small, infrequent amounts and discuss with a provider. (See NIH and Harvard vitamin A guidance.)Source matters: choose livers from animals raised in clean environments — reputable butchers, trusted suppliers, or certified organic/regenerative sources are preferable in areas with known contamination. Rotate types of animal protein to avoid single-food exposure to contaminants.Cooking methods: quick pan-frying to medium doneness, making pâtés, or combining liver with acidic or dairy elements will improve palatability while limiting overcooking (which tightens texture). Traditional recipes (e.g., chopped chicken liver, liver and onions, regional curried goat liver) offer flavorful templates.Population cautions: children, pregnant women, people with hypervitaminosis A risk or certain genetic cholesterol disorders should seek tailored advice from healthcare professionals before adding regular liver servings.
For iron and B12 with milder flavor: chicken liver is approachable and versatile.For maximal vitamin A and traditional hearty dishes: beef (cow) liver offers the highest retinol stores per typical serving and deep, classic flavors.
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