Feta cheese isn’t a heart-health superfood, but it’s not the villain some people assume either. With roughly 300-400 mg of sodium per ounce and a moderate amount of saturated fat, feta deserves some caution. But it also delivers meaningful nutrients, beneficial fatty acids, and live cultures that may work in your favor, especially when you use it as a flavor accent rather than a main ingredient.
What’s Actually in an Ounce of Feta
A one-ounce serving of feta (about the size of a pair of dice) packs around 4 grams of protein and nearly 140 mg of calcium, which is roughly 14% of what most adults need daily. You also get about 96 mg of phosphorus and a small but useful dose of vitamin B12. Calorie-wise, feta runs lighter than many cheeses at approximately 75 calories per ounce, compared to around 115 for cheddar.
The trade-off is sodium. Feta is brined during production, which gives it that tangy, salty bite but also loads it with salt. A single ounce can contain 300 to 400 mg of sodium, which is 13-17% of the American Heart Association’s recommended daily cap of 2,300 mg (and an even larger chunk of the ideal 1,500 mg target for people managing blood pressure). That’s significantly more sodium than the same amount of mozzarella or Swiss cheese.
The Saturated Fat Question
Full-fat dairy has long been flagged as a concern for heart health, and the American Heart Association still recommends choosing low-fat or fat-free dairy when possible. Feta contains about 4 to 6 grams of fat per ounce, most of it saturated. That said, feta’s lower total fat compared to harder cheeses like cheddar or Gruyère means you’re getting less saturated fat per serving than many alternatives.
There’s also a more nuanced picture emerging around dairy fat. Feta made from sheep’s and goat’s milk, as traditional Greek feta is, contains higher levels of a naturally occurring fatty acid called conjugated linoleic acid (CLA). Greek cheeses average about 0.8% CLA content in their fat, with some varieties reaching up to 1.9%. The sheep and goat milk used in production is the main reason for these relatively high levels. CLA has attracted research interest for potential protective effects, though the cardiovascular benefits specifically remain an open question. Most of the stronger evidence for CLA relates to other areas of health rather than heart disease directly.
Probiotics and Cholesterol
Because feta is aged in brine rather than heated to high temperatures, it can retain live bacterial cultures, making it a potential source of probiotics. Not all commercially sold feta contains significant live cultures (pasteurization and processing matter), but traditionally made feta often does.
One randomized controlled trial tested feta cheese enriched with two well-studied probiotic strains and found notable improvements in blood lipid profiles. Participants who ate the probiotic feta saw their total cholesterol drop by about 0.5 mmol/L compared to a control group. Their LDL (“bad”) cholesterol fell, their HDL (“good”) cholesterol rose, and their triglycerides decreased. The probiotic cheese actually outperformed probiotic yogurt for improving blood lipids in the same trial.
This is promising but comes with caveats. The study used cheese specifically enriched with high concentrations of probiotics, not standard grocery-store feta. Regular feta may contain some beneficial bacteria, but likely at lower and more variable levels. Still, it suggests that fermented cheeses like feta have properties that processed cheese simply doesn’t.
How Feta Fits a Heart-Healthy Diet
The real question isn’t whether feta is “good” or “bad” for your heart. It’s how much you eat and what role it plays in your overall diet. Feta works well as a finishing ingredient: crumbled over a salad, scattered on roasted vegetables, or mixed into grain bowls. Used this way, a half-ounce to one ounce adds big flavor without excessive sodium or saturated fat. The strong taste means a little goes further than milder cheeses, so you naturally use less.
If sodium is a concern for you, rinsing feta briefly under water before eating can wash away some of the surface brine and reduce the salt content modestly. Choosing feta packed in less brine or labeled “reduced sodium” (when available) helps too.
Context matters as well. Feta is a staple of the Mediterranean diet, which consistently ranks among the most heart-protective eating patterns studied. In that context, feta appears alongside olive oil, vegetables, legumes, whole grains, and fish. Greeks have among the highest cheese consumption rates in Europe, yet their cardiovascular outcomes don’t reflect the harm you might expect if cheese were purely negative. The surrounding diet likely plays a major role in offsetting the sodium and saturated fat.
Feta vs. Other Cheeses for Heart Health
- Sodium: Feta is one of the saltier options. Swiss, fresh mozzarella, and ricotta all contain significantly less sodium per serving.
- Saturated fat: Feta falls in the moderate range. It has less saturated fat per ounce than cheddar, Parmesan, or cream cheese, but more than cottage cheese.
- Beneficial fats: Sheep’s and goat’s milk feta delivers more CLA than cow’s milk cheeses, giving it a slight edge in fatty acid quality.
- Live cultures: Feta, along with aged cheeses like Gouda and certain cheddars, is more likely to contain live bacteria than processed or heavily pasteurized varieties.
If your priority is strictly minimizing sodium and saturated fat, fresh mozzarella or cottage cheese are better picks. If you value flavor density (using less cheese overall), probiotic potential, and a place within a Mediterranean-style eating pattern, feta holds up well.