Pastrami is a high-protein deli meat, delivering about 22 grams of protein per 100 grams. That puts it ahead of roast beef (roughly 19 grams per 100 grams) and on par with other top-tier protein sources like chicken breast and canned tuna. Whether you’re building a sandwich or planning meals around your macros, pastrami earns its spot as a protein-dense option.
Protein and Calories in a Typical Serving
How much protein you get depends on the style of pastrami. A standard deli serving of lean, low-fat pastrami (about 6 thin slices, or 57 grams) contains around 54 calories and delivers a solid hit of protein with less than 1 gram of fat. That’s an exceptional protein-to-calorie ratio, meaning almost all the calories come from protein itself.
Full-fat pastrami, the kind you’d find at a traditional deli counter sliced thick from a whole brisket, runs higher in both calories and fat. A serving can contain roughly 24 grams of protein alongside 24 grams of fat. That’s still protein-rich, but the calorie count is significantly higher. If your goal is maximizing protein while keeping calories low, leaner commercial varieties are the better pick.
How Pastrami Compares to Other Deli Meats
Pastrami holds up well against other sandwich staples. Per 100 calories, pastrami provides about 15 grams of protein. Roast beef is slightly more efficient at 16 grams per 100 calories, but the difference is negligible. Turkey pastrami, made from turkey instead of beef, gets about 48% of its calories from protein, with roughly 5 grams of protein per ounce. It’s a reasonable alternative, though it tends to carry a bit more fat relative to its size than you might expect from a turkey product.
The real advantage pastrami has over many deli meats is its flavor density. You don’t need to pile it high to make a satisfying meal, which can help keep portions and calories in check.
Complete Protein With Key Nutrients
Pastrami is a complete protein, meaning it contains all nine essential amino acids your body can’t make on its own. These include leucine, which plays a central role in muscle repair and growth, along with lysine, valine, and the rest of the full set. For muscle building or recovery, that completeness matters more than the raw gram count.
Beyond protein, pastrami supplies meaningful amounts of iron and vitamin B12. A 100-gram portion contains about 2.2 milligrams of iron and 1.9 micrograms of B12. Iron supports oxygen transport in your blood, and B12 is essential for nerve function and red blood cell production. These are nutrients that many people, especially those who limit red meat, can fall short on.
Sodium Is the Trade-Off
The main nutritional downside of pastrami is its sodium content. A single serving contains around 334 milligrams, which is about 22% of the recommended daily limit. That’s typical of cured and brined meats, and it adds up fast if you’re eating pastrami regularly or stacking multiple servings in a sandwich.
For most healthy adults, an occasional pastrami sandwich won’t cause problems. But if you’re managing blood pressure or following a low-sodium diet, this is worth paying attention to. Rinsing sliced pastrami briefly or choosing lower-sodium brands can help, though it will affect the flavor.
Processed Meat and Long-Term Health
Pastrami is a processed meat, meaning it’s been cured, smoked, and seasoned. That processing typically involves nitrates or nitrites, compounds used to preserve color and prevent bacterial growth. These can form nitrosamines, which are linked to cancer risk at high exposure levels. Regulatory agencies in both the U.S. and Europe set limits on nitrite and nitrate use in food products to minimize this risk.
A 2025 risk assessment published in Scientific Reports found that typical dietary exposure to nitrosamines from processed meats fell well within safe margins, indicating a low level of concern for cancer risk at normal consumption levels. The key phrase there is “normal consumption.” Eating pastrami a few times a week as part of a varied diet is a different story than relying on processed meats as your primary protein source every day.
Pastrami on a Low-Carb or Keto Diet
Pastrami contains zero net carbs, making it a natural fit for ketogenic and low-carb eating plans. Full-fat pastrami, with its roughly equal ratio of protein to fat, aligns well with the macronutrient targets most keto dieters aim for. Leaner varieties still work on low-carb diets but provide less of the dietary fat that keto relies on for energy. Either way, the zero-carb profile makes pastrami one of the more versatile deli options for carb-restricted eating.