Cheese is generally a safe and even beneficial choice for people with diabetes, as long as you pick the right types and watch your portions. Most natural cheeses contain little to no carbohydrates, which means they have minimal direct impact on blood sugar. The key distinction is between natural cheeses like cheddar, Swiss, and mozzarella, which rank low on the glycemic index (55 or below), and processed cheeses like individually wrapped slices and cheese sprays, which can spike blood sugar and carry far more sodium.
Why Cheese Has Little Effect on Blood Sugar
Cheese is primarily made up of protein and fat, with very few carbohydrates. Since carbohydrates are the nutrient that raises blood sugar, a one-ounce serving of cheddar or mozzarella barely registers on your glucose levels. The protein and fat in cheese also slow digestion, which helps prevent the rapid blood sugar spikes that come from eating carb-heavy foods on their own. This is why pairing a small amount of cheese with crackers or fruit can blunt the glucose response you’d get from eating those foods alone.
According to Diabetes Canada, natural cheeses like cheddar fall into the low glycemic index category, scoring 55 or below. Processed cheeses, on the other hand, land in the high glycemic index range of 70 or above, partly because manufacturers add fillers, starches, and other ingredients that bump up the carb content.
Natural Cheese vs. Processed Cheese
This is the single most important distinction for anyone managing diabetes. Natural cheeses (cheddar, Swiss, gouda, feta, mozzarella, brie) are made from milk, cultures, salt, and enzymes. Their ingredient lists are short, their carbohydrate content is negligible, and their protein content is high.
Processed cheeses tell a different story. Single-slice packaged cheese, nacho cheese sauce, and spray cheese often contain added starches, sugars, emulsifiers, and significantly more sodium. A study comparing salt content found that processed cheese averaged 863 mg of sodium per 100 grams, while fresh cheese averaged 498 mg per 100 grams. That’s roughly 70% more salt in the processed version. For people with diabetes, who already face elevated risk of high blood pressure and heart disease, that extra sodium adds up fast.
The Saturated Fat Question
Cheese is a significant source of saturated fat, and this deserves attention if you have diabetes. Strong evidence from the USDA’s Nutrition Evidence Systematic Review shows that saturated fat intake is positively associated with both cardiovascular disease risk and increased insulin resistance. Replacing just 5% of your daily calories from saturated fat with unsaturated fats (like those found in olive oil, nuts, or avocado) decreases risk of cardiovascular disease and type 2 diabetes, and improves insulin responsiveness in people who already have insulin resistance.
This doesn’t mean you need to avoid cheese entirely. It means that choosing lower-fat options when possible, and keeping portions reasonable, lets you enjoy the benefits of cheese (protein, calcium, low carbs) without overloading on saturated fat. Part-skim mozzarella, reduced-fat Swiss, and goat cheese tend to be leaner choices compared to triple-cream brie or full-fat cheddar.
Best and Worst Cheeses for Diabetes
When choosing cheese, you’re balancing three things: low carbs (almost all natural cheeses qualify), moderate sodium, and reasonable fat content. Here’s how common cheeses stack up on sodium per one-ounce serving:
- Swiss: 53 mg sodium, one of the lowest-sodium options available
- Cream cheese: 89 mg sodium, though it’s higher in fat and lower in protein
- Goat cheese (soft): 130 mg sodium
- Brick: 159 mg sodium
- Monterey Jack: 170 mg sodium
- Mozzarella (whole milk): 178 mg sodium
- Cheddar: 185 mg sodium
- Feta: 260 mg sodium
- Blue cheese: 325 mg sodium
- Parmesan: 390 mg sodium
- American (processed): 468 mg sodium
Swiss cheese stands out as a clear winner with just 53 mg of sodium per ounce. Mozzarella, goat cheese, and Monterey Jack all sit in a reasonable middle range. Parmesan is high in sodium, but because it has such a concentrated flavor, you typically use less of it. American processed cheese is one of the worst choices, combining high sodium with the added fillers and starches found in processed varieties.
How Much Cheese to Eat
The Diabetes Research Institute recommends a serving size of one ounce for low-fat cheese, or a quarter cup for low-fat cottage cheese. One ounce is roughly the size of your thumb, or about the size of four dice. That’s smaller than most people expect, and it matters because even a low-carb food can contribute excess calories and saturated fat if the portions creep up.
One to two ounces per day is a practical range for most people managing diabetes. Spreading cheese across meals rather than eating a large amount at once helps keep your overall fat and sodium intake in check. A slice of Swiss on a sandwich at lunch and a sprinkle of Parmesan on vegetables at dinner is a reasonable day’s worth.
Smart Ways to Use Cheese
Cheese works well as part of a balanced snack because its protein and fat content help you feel full longer. Pairing an ounce of cheddar with a small handful of nuts or some vegetable sticks gives you a snack that won’t spike blood sugar and will keep hunger at bay until your next meal. This is particularly useful for avoiding the high-carb snacking that tends to destabilize blood sugar between meals.
Using strongly flavored cheeses like Parmesan, aged cheddar, or feta lets you get more taste from a smaller portion. A tablespoon of grated Parmesan over a salad delivers plenty of flavor with a fraction of the saturated fat you’d get from a thick slice of mild cheese. Similarly, crumbled feta adds a salty, tangy punch to roasted vegetables without needing much.
When cooking, be cautious with cheese-heavy dishes like mac and cheese, quesadillas loaded with processed cheese, or cream-based sauces. These can easily push you past three or four ounces of cheese in a single sitting, which translates to a significant load of saturated fat and sodium. If you’re making these dishes at home, using a smaller amount of a sharp, flavorful cheese gives you the taste you want with better nutritional balance.