Feta cheese is low FODMAP at servings up to 40 grams, which is roughly a quarter cup of crumbled feta. The aging and brining process breaks down most of the lactose in the milk, leaving feta with very little of the sugar that causes digestive trouble for people with IBS or lactose sensitivity.
Why Feta Is Low in FODMAPs
The main FODMAP concern with dairy is lactose, a milk sugar that many people struggle to digest. During cheesemaking, bacteria consume lactose as part of the fermentation process. Feta is then aged in brine for weeks to months, which further reduces its lactose content. By the time feta reaches your plate, the amount of lactose per serving is small enough that it falls well within the low FODMAP range.
Kaiser Permanente groups feta alongside cheddar, Swiss, parmesan, brie, and mozzarella as hard cheeses that are safe on a low FODMAP diet. The key detail is portion control. Staying at or below the recommended serving keeps you in the safe zone. Going significantly beyond that in a single sitting could push lactose intake into moderate or high FODMAP territory.
How Much Feta You Can Eat
The standard low FODMAP serving for feta is up to 40 grams, about 1.5 ounces. That’s a generous crumble over a salad or a few cubes alongside roasted vegetables. For most meals, this is plenty to get that salty, tangy flavor feta is known for.
If you’re eating multiple servings of dairy across the same meal (say, feta on a salad plus mozzarella on a side dish), the lactose adds up. Most people with lactose sensitivity can handle roughly 12 to 15 grams of lactose spread across a full day, according to Monash University. A 40-gram serving of feta contains far less than that on its own, but stacking several dairy sources in one sitting can push you closer to your personal threshold.
Does the Milk Source Matter?
Feta is traditionally made from sheep’s milk, goat’s milk, or a blend of the two. In many countries, you’ll also find feta-style cheese made from cow’s milk. The raw lactose content of these milks does differ slightly. Cow’s milk contains around 4.6% lactose, while goat’s milk tends to be a bit lower. Sheep’s milk falls in a similar range to cow’s milk.
In practice, these differences are small and largely irrelevant once the milk has been turned into cheese. The fermentation and aging process reduces lactose so dramatically that the starting milk type has minimal impact on the final product. Whether your feta is made from sheep, goat, or cow milk, the FODMAP status at a standard serving is the same.
Flavored and Marinated Feta
Plain feta is the safe choice. Marinated feta, especially versions packed in oil with garlic or onion, can introduce high FODMAP ingredients. Garlic-infused oil is a common culprit. If you’re buying marinated feta, check the ingredient list carefully. Garlic and onion are both high FODMAP even in small amounts, and they’re popular additions to flavored cheese products.
Feta stuffed into peppers, mixed into dips, or blended into spreads can also carry hidden FODMAPs depending on what else is in the recipe. Stick with plain feta and add your own low FODMAP seasonings (herbs, lemon juice, chili flakes) to keep things safe.
Other Low FODMAP Cheeses With Similar Flavor
If you like feta’s salty, crumbly character, several other cheeses offer a comparable experience while staying low FODMAP at similar serving sizes:
- Goat cheese (chèvre): Soft, tangy, and crumbles easily. Works as a near-direct substitute in salads and grain bowls.
- Pecorino: A hard, salty Italian cheese made from sheep’s milk. Grates well over pasta or roasted vegetables.
- Halloumi: Firm and salty with a high melting point, so it holds up on the grill or in a pan.
- Queso fresco: Mild and crumbly, common in Mexican cuisine. Less tangy than feta but a good textural match.
All of these are considered low FODMAP at servings up to 40 grams. Aged and hard cheeses in general tend to be safer because the aging process removes more lactose. Softer, fresher cheeses like ricotta and cottage cheese are also low FODMAP but have slightly different thresholds, so checking portion guidance for each one individually is worth the effort.
Using Feta During Elimination and Reintroduction
During the elimination phase of a low FODMAP diet, feta at 40 grams or less is considered safe to include. You don’t need to cut it out. Because its lactose content is so low, it’s one of the easiest dairy foods to keep in your rotation while you’re identifying your personal triggers.
During reintroduction, when you’re testing lactose tolerance specifically, feta isn’t the best choice as a challenge food. Its lactose content is too low to give you a meaningful signal. Milk or yogurt, which contain substantially more lactose per serving, are better options for gauging your sensitivity. Once you know your lactose threshold, you can confidently adjust how much feta (and other cheeses) you include in meals.