Bison and chicken breast are both lean, high-protein meats, but they excel in different areas. Chicken breast is slightly lower in calories and fat, while bison delivers significantly more iron, zinc, B12, and omega-3 fatty acids. Which one is “healthier” depends on whether you’re optimizing for calorie count or nutrient density.
Calories, Protein, and Fat Side by Side
Per 100 grams (about 3.5 ounces) of raw lean meat, the two are remarkably close:
- Bison: 122 calories, 23.3 g protein, 2.4 g fat
- Chicken breast: 112 calories, 22.7 g protein, 1.6 g fat
That’s a difference of just 10 calories and less than one gram of fat. Protein is nearly identical. If your only goal is keeping calories as low as possible, chicken breast wins by a small margin. But that 10-calorie gap essentially disappears once you factor in cooking oil, seasoning, or any sauce you add.
Where Bison Pulls Ahead: Minerals and B12
Red meat in general is a richer source of iron, zinc, and vitamin B12 than poultry, and bison is no exception. Cooked bison contains about 2.3 mg of iron and 5.1 mg of zinc per 100 grams. Chicken breast provides roughly 0.4 mg of iron and 0.7 mg of zinc for the same serving. That means a single serving of bison can deliver more than five times the iron and seven times the zinc you’d get from chicken.
Bison is also exceptionally high in B12, a vitamin essential for nerve function and red blood cell production. These micronutrient advantages matter most for people who are prone to iron deficiency (common in women of reproductive age and endurance athletes) or anyone limiting their red meat intake and looking for the most nutrient-dense option when they do eat it.
Omega-3s and Fatty Acid Balance
This is where the gap between the two meats is most dramatic, and it favors bison by a wide margin. Range-fed bison has an omega-6 to omega-3 ratio of roughly 2:1. Chicken breast sits at about 18.5:1. A lower ratio is generally associated with less inflammation and better cardiovascular outcomes, so bison’s fatty acid profile is far more favorable despite both meats being very low in total fat.
Range-fed bison also contains higher levels of omega-3 fatty acids than either feedlot-raised animals or chicken breast. Chicken, by contrast, is notably higher in omega-6 fatty acids than bison, beef, or elk. Most people already consume far more omega-6 than omega-3 in their diets, so choosing a protein source that doesn’t add to that imbalance has real value.
Cholesterol and Heart Health
Contrary to what many people assume, chicken breast actually contains more cholesterol per 100 grams of tissue than most bison cuts. Range-fed bison had the lowest cholesterol levels of any meat tested in a comparative study published in the Journal of Animal Science, at about 44 mg per 100 grams in lean cuts, while chicken breast measured higher.
Bison also contains roughly four times more conjugated linoleic acid (CLA) than chicken breast. CLA is a naturally occurring fat found in ruminant animals that has been linked to improved body composition and reduced inflammation in some studies. Chicken breast contains only trace amounts (about 0.1%), while bison cuts range from 0.3% to 0.4%, with range-fed animals at the higher end.
How Feeding Practices Change the Picture
One important detail: the nutritional profile of bison shifts depending on how the animal was raised. Range-fed bison consistently outperform feedlot bison in omega-3 content, polyunsaturated fat levels, and CLA concentration. Feedlot bison have a fattier acid profile that looks more like conventional beef.
Bison also has a regulatory advantage. Growth hormones and antibiotics are not given to bison, according to the USDA’s Food Safety and Inspection Service. While poultry regulations prohibit added hormones as well, antibiotic use in commercial chicken farming remains common. If minimizing exposure to antibiotics used in animal agriculture is a priority for you, bison is a cleaner choice by default.
The Practical Tradeoffs
Bison costs more, typically two to three times the price of chicken breast per pound. It’s also less widely available, though most large grocery chains now carry ground bison and some steak cuts. Because bison is so lean, it cooks faster and dries out more easily than fattier meats. Ground bison works well as a direct substitute for ground turkey or beef, but bison steaks need lower heat and shorter cooking times than you might be used to.
Chicken breast remains one of the most versatile, affordable, and accessible protein sources available. It’s a perfectly healthy lean meat. But if you’re choosing between the two purely on nutritional merit, bison offers more iron, more zinc, more B12, a better omega-3 to omega-6 ratio, less cholesterol, and no antibiotic exposure. Chicken’s advantages are limited to slightly fewer calories and a lower price tag. For most people, the smartest approach is eating both: chicken as your everyday protein and bison when you want a more nutrient-dense option a few times a week.