Plain pastrami made from beef is low in FODMAPs by itself, since meat contains no fermentable carbohydrates. But the reality is more complicated than that, because pastrami is never just meat. It’s brined, cured, and coated in a spice rub, and any of those steps can introduce FODMAP triggers depending on the brand or recipe.
Why Plain Beef Is Safe
FODMAPs are specific types of carbohydrates: certain sugars, sugar alcohols, and short-chain fibers that ferment in the gut and draw in water, causing bloating, gas, and pain in sensitive people. Meat, poultry, and fish contain virtually zero carbohydrates, which means they contain zero FODMAPs. A plain piece of beef brisket, the cut pastrami is made from, is completely safe during the elimination phase of a low FODMAP diet.
The problem is that pastrami goes through an extensive preparation process before it reaches your plate. It’s soaked in a brine for days, coated in a spice crust, then smoked. Each of those layers can add ingredients that matter.
The Spice Rub Is Mostly Fine
A traditional pastrami rub relies on coarsely ground black pepper and coriander seeds as its signature flavors, sometimes with mustard seed. All three of these spices are low in FODMAPs at typical serving sizes, according to Monash University, the research group that developed the FODMAP system. So the classic spice crust you see on deli pastrami is not a concern on its own.
Where spice blends get tricky is when manufacturers add garlic powder or onion powder to the mix. Garlic and onion are among the highest FODMAP ingredients in existence, and even small amounts can trigger symptoms in people who are sensitive to fructans. This is especially common in pre-packaged or mass-produced pastrami, where the spice blend is formulated for broad flavor appeal rather than digestive safety.
Hidden Ingredients on the Label
Reading the ingredient list on deli pastrami requires some detective work. According to the USDA’s Food Safety and Inspection Service, ingredients like onion powder, garlic powder, onion juice, and garlic juice can all be legally listed on meat labels simply as “natural flavor,” “flavor,” or “flavoring.” That single vague word on the package could be hiding one of your biggest triggers.
The same goes for “spices” listed without further detail. A manufacturer is not required to break out every individual spice, so garlic or onion can sit inside that catch-all term without your knowledge. If you’re in the elimination phase of a low FODMAP diet, any pastrami label that includes “natural flavors,” “flavoring,” or an unspecified “spices” listing is a gamble.
Your safest options are brands that spell out every ingredient individually, or pastrami from a deli counter where the staff can tell you exactly what’s in the brine and rub. Some specialty brands now market specifically to people with food sensitivities and list full ingredient breakdowns.
The Brine Can Add Sweeteners
Pastrami brine typically contains salt, water, curing salts, and some form of sweetener. Many traditional recipes use granulated sugar (sucrose), which is low FODMAP in moderate amounts. But some recipes and commercial producers use honey, brown sugar, maple syrup, or high fructose corn syrup. Honey is high in excess fructose and is a well-known FODMAP trigger. High fructose corn syrup poses the same problem.
In a homemade brine, you control the sweetener. Commercial pastrami may or may not disclose exactly which sweetener was used, so this is another reason to check the full ingredient list carefully.
Nitrates, Nitrites, and Gut Sensitivity
Most pastrami is cured with sodium nitrite or sodium nitrate, preservatives that give it the characteristic pink color and prevent bacterial growth. These aren’t FODMAPs, so they won’t show up on a Monash University app search. But they may still matter for your gut.
Nitrates and nitrites can increase histamine levels in the body, and histamine intolerance overlaps with IBS more often than you might expect. Estimates suggest around 58% of people with IBS may have some degree of histamine intolerance. If you’ve noticed that cured or aged foods like salami, aged cheese, or smoked fish tend to bother you even when they’re technically low FODMAP, histamine could be the reason pastrami causes trouble despite being FODMAP-safe on paper.
This doesn’t mean everyone with IBS needs to avoid cured meats. But if you’ve cleared FODMAPs as the issue and still react to pastrami, histamine sensitivity is worth exploring with a dietitian.
How to Choose Pastrami Safely
- Read every ingredient. Skip any product listing “natural flavors,” “flavoring,” or unspecified “spices” unless you can confirm with the manufacturer that no garlic or onion is included.
- Look for simple brines. Choose products where the sweetener is listed as sugar or sucrose rather than honey or high fructose corn syrup.
- Ask at the deli counter. Freshly sliced pastrami from a butcher or deli that makes it in-house gives you the best chance of getting a straight answer about ingredients.
- Make your own. Homemade pastrami gives you full control over the brine and rub. Use granulated sugar, skip garlic and onion, and stick to the classic black pepper and coriander crust.
- Start small. Even if the ingredient list looks clean, try a small portion first if you’re in the elimination phase, then increase the amount in later servings to test your tolerance.