Pork and beef are nutritionally closer than most people assume, but they differ in meaningful ways depending on the cut. Lean pork tenderloin and loin cuts tend to be lower in total fat and saturated fat than equivalent beef cuts, while beef delivers more iron, zinc, and vitamin B12. Neither meat is categorically “better” for you. The answer depends on what your body needs and which cuts you’re actually eating.
Fat and Calories: Cut Matters More Than Species
The biggest nutritional gap between pork and beef shows up in fat content, but only when you compare similar cuts. A 100-gram serving of pork loin contains about 4.7 grams of total fat, with 1.6 grams of saturated fat. The same amount of beef loin has 10.3 grams of total fat and 3.9 grams of saturated fat. That’s more than double the fat and nearly two and a half times the saturated fat.
Pork loin also has a more balanced fat profile. Its saturated and monounsaturated fats are roughly equal (1.6 grams each), and it provides twice the polyunsaturated fat of beef loin (0.8 grams vs. 0.4 grams). Polyunsaturated fats include omega-6 and omega-3 fatty acids, which play roles in inflammation regulation and cell membrane health.
But this comparison falls apart once you move away from lean cuts. Pork belly, the cut used for bacon, packs 53 grams of fat per 100-gram serving, with 19.3 grams of that being saturated. Pork chops come in at 23.8 grams of fat with 8.2 grams saturated. These numbers dwarf even the fattier beef cuts. So “pork” isn’t automatically leaner. Pork loin and tenderloin are lean. Pork belly, ribs, and many chops are not.
On the calorie side, a 3-ounce serving of 95% lean ground beef runs about 139 calories. Lean pork cuts like boneless top loin roast come in around 170 calories for the same serving size. When both meats are trimmed lean, the calorie difference is modest.
Where Beef Wins: Iron, Zinc, and B12
Beef is one of the best dietary sources of several nutrients that many people don’t get enough of. A 100-gram serving of beef provides 1 to 7.8 milligrams of iron depending on the cut, with darker cuts like chuck and round landing higher on that range. This iron is in the heme form, which your body absorbs far more efficiently than the iron found in plants.
Beef also delivers 2.3 to 7.7 milligrams of zinc per 100 grams, making it one of the richest zinc sources in the typical Western diet. Zinc supports immune function, wound healing, and hormone production. Pork contains zinc too, but generally in lower concentrations.
Vitamin B12 is another area where beef pulls ahead, with levels ranging from 0.4 to 3.1 micrograms per 100 grams. B12 is essential for nerve function and red blood cell production, and it’s only found naturally in animal foods. Pork provides B12 as well, but beef is the more concentrated source.
Where Pork Wins: Thiamine and Selenium
Pork is the standout source of thiamine (vitamin B1) among all common meats. Thiamine helps your body convert carbohydrates into energy and is critical for nerve and muscle function. A single serving of pork can provide a substantial portion of your daily thiamine needs, while beef offers comparatively little.
Pork also tends to be richer in selenium, with levels ranging from 0.05 to 1.23 milligrams per 100 grams depending on the cut and the animal’s diet. Selenium acts as an antioxidant and supports thyroid function. The wide range reflects how much the animal’s feed influences the final nutrient content of the meat.
Protein Quality Is Nearly Identical
Both pork and beef are complete proteins, meaning they contain all nine essential amino acids your body can’t make on its own. Beef steaks score between 80% and 121% on the Digestible Indispensable Amino Acid Score (DIAAS), the current gold standard for measuring protein quality. Ground beef lands between 91% and 99%. Pork scores in a similar range, though fewer studies have pinned down exact numbers. For practical purposes, both meats deliver high-quality, highly digestible protein. You won’t notice a meaningful difference in muscle building or recovery between the two.
Heart Disease and Cancer Risk
Both pork and beef fall under the umbrella of “red meat,” which the International Agency for Research on Cancer classifies as a probable carcinogen. This classification applies to all unprocessed mammalian muscle meat, including beef, pork, lamb, and game. The concern isn’t unique to either animal. It centers on compounds that form during high-temperature cooking (grilling, pan-frying, barbecuing) and on chemicals produced during processing like curing and smoking.
The cardiovascular picture is more nuanced than headlines suggest. A large systematic review pooling data from multiple studies found that unprocessed red meat intake was not significantly associated with coronary heart disease, with a relative risk of 1.00 per 100-gram daily serving. The association with diabetes was also not statistically significant. Processed meat, on the other hand, showed clearer links to both conditions. This means the form your meat takes (fresh vs. bacon, sausage, or deli meat) likely matters more than whether it came from a pig or a cow.
The U.S. Dietary Guidelines for Americans group beef, pork, lamb, and game together in one category and recommend 26 ounce-equivalents per week of meats, poultry, and eggs combined for a 2,000-calorie diet. They emphasize choosing lean or low-fat versions and keeping saturated fat below 10% of daily calories. Neither pork nor beef gets special treatment, positive or negative.
Antibiotics in Production
One lesser-known difference between pork and beef involves how the animals are raised. The U.S. swine industry uses medically important antibiotics at a higher rate than the cattle industry. In 2020, antibiotic consumption in swine production was about 268 milligrams per kilogram of livestock, compared to 161 milligrams per kilogram in cattle production. While the FDA banned antibiotic use for growth promotion in 2017, the same drugs are still legally given through feed for disease prevention, often at similar doses and durations.
This doesn’t necessarily mean antibiotic residues end up in the pork on your plate, since withdrawal periods are required before slaughter. But the higher usage rate in pork production contributes to broader concerns about antibiotic-resistant bacteria in the food supply and environment.
Choosing Between Them
If you’re trying to reduce saturated fat, pork loin is one of the leanest red meat options available, beating out most beef cuts by a wide margin. If you’re concerned about iron or zinc intake, particularly if you’re pregnant, anemic, or eating a restricted diet, beef is the stronger choice. Both meats fit within a balanced diet when you stick to lean cuts and avoid processed versions.
The practical takeaway is that the cut selection and cooking method shape your health outcomes more than the animal itself. A grilled pork tenderloin and a roasted beef sirloin are both solid protein sources. A plate of bacon and a heavily marbled ribeye are both high in saturated fat. Framing the question as “pork vs. beef” misses the real variable, which is how much fat the cut carries and what you do with it in the kitchen.