Bison is a solid source of iron, providing about 2.6 mg per 100 grams of raw meat. That’s roughly 32% of the daily recommended intake for adult men and 14% for premenopausal women from a single serving. As red meats go, bison delivers this iron in a leaner package than conventional beef, making it a popular choice for people looking to boost their iron intake without loading up on saturated fat.
How Much Iron Is in Bison?
A 100-gram portion of raw ground bison contains 2.6 mg of iron, according to USDA data. To put that in everyday terms, a typical 4-ounce (113-gram) serving before cooking gives you a meaningful chunk of your daily needs. Adult men and women over 51 need 8 mg of iron per day, while premenopausal women need 18 mg. So a single serving of bison covers about a third of the requirement for men and older adults, or about 15% for younger women.
The iron in bison is predominantly heme iron, the form found in animal tissue. Your body absorbs heme iron far more efficiently than the non-heme iron found in plant foods like spinach or lentils. Absorption rates for heme iron typically range from 15% to 35%, compared to just 2% to 20% for non-heme iron. This means the iron you get from bison is more bioavailable than what the raw numbers on a nutrition label might suggest when compared to plant sources.
Bison vs. Beef for Iron
Iron content between bison and lean beef is fairly comparable, so the real advantage of bison isn’t dramatically more iron per serving. Where bison pulls ahead is in the overall nutritional trade-off. A 4-ounce serving of bison has about 166 calories, 8 grams of fat, and 3 grams of saturated fat. The same portion of beef comes in at 224 calories, 14 grams of fat, and 6 grams of saturated fat. You’re getting a similar iron payload with nearly 60 fewer calories and half the saturated fat.
For someone specifically eating red meat to support iron levels, this matters. You can eat bison more regularly without the caloric and fat burden that comes with fattier cuts of beef. Bison also tends to be grass-finished, which can influence its overall fatty acid profile favorably, though the iron content itself is more a function of the muscle tissue than the animal’s diet.
Other Nutrients That Come With It
Iron isn’t the only reason bison stands out nutritionally. A cooked 4-ounce serving delivers 68% of the daily value for vitamin B12, 35% for zinc, and 31% for selenium. B12 is essential for red blood cell formation and nerve function, zinc supports immune health and wound healing, and selenium acts as an antioxidant in the body. These nutrients often travel together in red meat, and bison is particularly dense in all three relative to its calorie count.
The combination of iron and B12 is especially relevant for anyone dealing with fatigue or low energy. Both nutrients play direct roles in oxygen transport and red blood cell production, so a deficiency in either one can cause overlapping symptoms. Bison addresses both in a single food.
Getting the Most Iron From Your Meal
Because bison contains heme iron, your body already absorbs it relatively well on its own. Adding vitamin C (from citrus, peppers, or tomatoes) is a well-known strategy for boosting iron absorption, but research from a study published in the American Journal of Clinical Nutrition found that this effect is far less dramatic in the context of a full meal than when tested with isolated foods. In a complete diet, vitamin C intake ranging from 51 to 247 mg per day didn’t produce a significant difference in iron absorption. The presence of animal tissue in the meal itself was a more reliable predictor of good absorption.
What does seem to interfere with iron absorption is phosphate, which is found in processed foods, sodas, and some dairy products. If maximizing iron uptake is your goal, pairing your bison with vegetables rather than heavily processed sides is a practical move. Coffee and tea consumed with a meal can also reduce non-heme iron absorption, though their effect on heme iron from meat is less pronounced.
Who Benefits Most From Iron-Rich Bison
Certain groups have a harder time meeting their iron needs. Premenopausal women lose iron through menstruation and need more than twice the daily amount that men do (18 mg vs. 8 mg). Endurance athletes, frequent blood donors, and people recovering from surgery also have elevated iron demands. For these groups, regularly including a heme iron source like bison can make a real difference in maintaining healthy iron stores without needing supplements.
On the other hand, people with hemochromatosis, a genetic condition that causes the body to absorb too much iron, need to be cautious with any red meat. Because heme iron bypasses some of the body’s normal regulation of iron absorption, it can contribute to iron overload more easily than plant-based iron sources. If you’ve been told your iron levels are already high, loading up on bison or any red meat could be counterproductive.
For most people, though, bison is one of the more efficient ways to get iron from whole food. It packs a meaningful dose of highly absorbable iron into a lean, nutrient-dense serving that also covers significant portions of your B12, zinc, and selenium needs.