How Much Iron Does Beef Have? | The Real Numbers

A 3-ounce serving of cooked ground beef (85% lean) contains about 2.2 mg of iron, while a general 3-ounce serving of beef provides roughly 2.5 mg.

You probably know beef is a good source of iron. But the number might be harder to pin down than you think. A single serving can deliver anywhere from two to three milligrams depending on the cut, how it’s cooked, and the fat content.

That small range matters. When you compare it against the recommended daily allowance of 18 mg for most adults, beef’s contribution looks more modest than the reputation suggests — though its bioavailability changes the picture.

How Much Iron Is In A Standard Serving Of Beef

The most consistent figures come from major medical centers and the beef industry itself. Cedars-Sinai lists a 3-ounce serving of cooked ground beef (85% lean) at 2.2 mg of iron. The BeefItsWhatsForDinner site puts general beef at about 2.5 mg for the same serving size.

That slight variation is normal. A leaner cut or a different cooking method can shift the number by a few tenths of a milligram. For practical purposes, you can expect roughly 2.2 to 2.5 mg of iron per 3-ounce serving of cooked beef.

Beef liver is a noticeably richer source. A 3-ounce serving of beef liver contains about 3.0 mg of iron — roughly 20 to 35 percent more than standard ground beef or steak cuts.

Why The Serving Size Difference Matters To Your Diet

A 3-ounce portion of meat is smaller than many people realize. That’s about the size of a deck of cards or the palm of your hand. If you typically eat a 6-ounce steak, you’re getting roughly 4.4 to 5.0 mg of iron from the beef alone, depending on the cut.

The RDA for iron is 18 mg per day for most adults. A single 3-ounce serving of beef covers roughly 12 to 14 percent of that target. An 8-ounce serving scales to about 6 mg, which moves the percentage toward a third of the daily need.

• Ground beef (3 oz, 85% lean): 2.2 mg of iron per the Cedars-Sinai iron-rich foods list
• General beef (3 oz): 2.5 mg per the beef industry nutrition data
• Beef liver (3 oz): 3.0 mg, making organ meat a richer option
• Pork or lamb (3 oz): 2.7 to 3.0 mg, slightly higher than ground beef
• Light poultry (3 oz): 2.0 mg, comparable but on the lower end

If you’re eating beef a few times a week, those milligrams add up. But the real advantage of beef over plant sources isn’t just the amount — it’s how well your body uses what you eat.

Why The Type Of Iron In Beef Changes The Numbers

The iron in beef is heme iron — the type found in animal muscle and organ meat. MSU’s extension program defines it as iron derived from animal sources that the body can absorb relatively well. That matters because not all iron is processed the same way.

Heme iron has an absorption rate of roughly 15 to 40 percent, per peer-reviewed research. Non-heme iron from plants sits at 1 to 15 percent. The body absorbs heme iron definition up to about 30 percent of the heme iron it takes in, according to the American Red Cross.

A single serving of beef delivers a modest milligram count, but a much higher percentage of that iron actually enters your bloodstream compared to an equivalent amount of spinach or beans. That’s the practical difference for most people.

These figures come from Cedars-Sinai’s iron-rich food PDF and the beef industry nutrition page. The small differences between cuts reflect natural variation in fat content and muscle density.

How Beef Compares To Other Iron Sources

Beef sits in the middle of the meat iron spectrum. Venison is higher at 4.98 mg per 100 grams, and lamb is lower at 1.78 mg. Among animal products, clams and sardines are significantly richer, with clams providing roughly 24 mg per 3-ounce serving.

For plant sources, a cup of cooked lentils provides about 6.6 mg of non-heme iron, and a cup of cooked spinach offers about 6.4 mg. The milligram count appears higher than beef, but the lower absorption rate means you may not retain as much.

1. Check your serving size: A 3-ounce portion is a deck-of-cards size. Most restaurant steaks are 6 to 8 ounces.
2. Pair with vitamin C: Eating beef with bell peppers, tomatoes, or citrus can boost absorption of any non-heme iron in the same meal.
3. Beef liver is denser: If your doctor recommends increasing iron, liver offers about 3.0 mg per 3-ounce serving — a small but meaningful bump.

The “meat factor” in beef may also enhance how your body absorbs non-heme iron from other foods eaten in the same meal, per research reviewed on ScienceDirect. That means a beef stir-fry with broccoli delivers more usable iron than the broccoli alone.

What This Means For Your Iron Intake

Stanford Medicine’s comparison of heme and non-heme iron notes that animal-derived iron is generally easier for the body to absorb than plant-based iron. That’s the key distinction. A vegan diet often has a higher total iron intake — roughly 22 mg per day versus 14 mg for omnivores in one study — but the lower absorption of non-heme iron can minimize the benefit.

The Red Cross recommends eating meat to boost iron levels, citing the higher absorption rates. Including a lean serving of beef a few times a week can help you maintain adequate iron stores without relying solely on plant sources or supplements. For context, heme vs non-heme iron absorption rates are documented in peer-reviewed literature, with the gap driving many dietary recommendations.

If you donate blood regularly, are pregnant, or have been told your ferritin is low, the combination of moderate milligram content and high bioavailability makes beef a practical food choice. The numbers are modest — but the body uses what’s there.

The Bottom Line

Beef provides 2.2 to 2.5 mg of iron per 3-ounce serving, with the heme form offering superior absorption compared to plant sources. That covers roughly 12 to 14 percent of the daily RDA for most adults. While the milligram count isn’t the highest among foods, the bioavailability makes it a reliable addition to a balanced diet.

If you’re working on raising your iron levels and eat meat, a registered dietitian can match beef’s 2.5 mg per serving against your specific ferritin goals and help you plan the right weekly portions without overdoing saturated fat.