Bacon is more nutrient-dense than most people expect. A single cooked slice contains about 44 calories, nearly 3 grams of protein, and 3.5 grams of fat, along with meaningful amounts of B vitamins, choline, and several minerals. It’s also high in sodium and saturated fat, which is why portion size matters.
Protein and Fat Per Slice
One slice of cooked bacon delivers roughly 2.9 grams of protein and 3.5 grams of total fat, of which about 1.15 grams is saturated. That means a typical three-slice serving gives you around 9 grams of protein for about 130 calories. The protein in bacon is complete, meaning it contains all nine essential amino acids your body can’t make on its own.
The fat in bacon is a mix of saturated and unsaturated types. The four dominant fatty acids are oleic acid (the same monounsaturated fat found in olive oil), palmitic acid, stearic acid, and linoleic acid. Roughly half of bacon’s total fat is monounsaturated, which is a detail that surprises people who assume it’s entirely saturated.
B Vitamins: Where Bacon Stands Out
Bacon is a genuinely strong source of several B vitamins, and the amounts vary depending on how you cook it. Per 100 grams of cooked bacon (roughly seven to eight slices), USDA data shows the following:
- Niacin (B3): 10 to 11.5 mg, which covers more than half the daily recommended intake. Niacin helps your body convert food into energy and supports skin and nerve function.
- Vitamin B12: 1.2 to 1.6 micrograms, supplying about half a day’s worth. B12 is essential for red blood cell formation and neurological function, and it’s found almost exclusively in animal foods.
- Vitamin B6: 0.3 to 0.4 mg, roughly 20 to 25% of daily needs. This vitamin supports immune health and helps your body process amino acids.
- Thiamin (B1): 0.35 to 0.6 mg, covering 30 to 50% of daily needs. Thiamin is critical for energy metabolism.
Microwaving actually preserves more thiamin and B12 than pan-frying or baking, likely because the shorter cooking time reduces heat exposure. Pan-frying yields slightly more niacin. The differences are modest, but if you’re eating bacon partly for its B-vitamin content, cooking method does make a small difference.
Choline: A Nutrient Most People Miss
One of bacon’s less talked-about nutrients is choline, a compound your body needs for cell membrane structure, brain signaling, and liver function. Pan-fried bacon contains about 130 mg of choline per 100 grams. Baked and microwaved bacon come in at around 120 mg. For context, the adequate daily intake for adults is 425 to 550 mg, so a few slices of bacon contribute a meaningful portion.
Choline deficiency can cause liver damage. In one well-known study, healthy men fed a choline-deficient diet developed fatty liver and liver damage that reversed once dietary choline was restored. Most Americans don’t get enough choline from their diets, making bacon one of several animal foods that help fill the gap alongside eggs, liver, and fish.
Sodium and the Curing Process
Sodium is the nutrient that makes bacon a food to watch. A 2-ounce serving of pork bacon (about four slices) contains roughly 1,300 milligrams of sodium, more than half the 2,300 mg daily limit most health guidelines recommend. That sodium comes primarily from the curing process, where salt and nitrites are used to preserve the meat, develop its flavor, and prevent bacterial growth.
Those nitrites also raise a separate concern. When bacon is fried at high heat, nitrites react with amino acids in the meat to form compounds called nitrosamines. Fried bacon is one of the most significant dietary sources of these compounds, according to USDA food safety research. The formation happens during cooking itself, so the amount of nitrites originally added during curing doesn’t tell the full story. Cooking at lower temperatures and avoiding charring can reduce nitrosamine formation.
How Pork Bacon Compares to Turkey Bacon
Turkey bacon is often positioned as the healthier swap, but the tradeoffs aren’t straightforward. Per 2-ounce serving, here’s how they stack up:
- Calories: Turkey bacon has 218, pork bacon has 268. A modest difference.
- Total fat: Turkey bacon has 14 grams versus 22 grams for pork, with 4 grams of saturated fat compared to 8 grams.
- Protein: Nearly identical. Pork bacon offers 20 grams, turkey bacon provides 17 grams.
- Sodium: Turkey bacon actually contains more, at over 1,900 milligrams per 2-ounce serving versus 1,300 milligrams for pork bacon.
So turkey bacon wins on fat and calories but loses on sodium, which is the very nutrient most people are trying to reduce by switching. If sodium is your main concern, turkey bacon is the wrong trade.
Where Bacon Fits in a Broader Diet
The American Heart Association’s 2026 dietary guidance classifies bacon as a processed meat and recommends minimizing it in favor of lean, unprocessed cuts of meat, poultry, or plant-based protein sources. The guidance doesn’t set a specific weekly limit in grams but emphasizes that dietary patterns lower in processed meat are consistently associated with better cardiovascular outcomes.
None of that means bacon has no nutritional value. It delivers complete protein, a strong B-vitamin profile, and a useful dose of choline in a relatively small number of calories. The issue is the package those nutrients come in: high sodium, saturated fat, and the potential for nitrosamine formation during cooking. Eating a few slices occasionally gives you the nutritional upside without the risks that come with daily consumption. For the same B vitamins and choline with less sodium, eggs, chicken breast, and pork tenderloin are worth considering as staples, with bacon playing more of a supporting role.