Swiss Cheese: Nutrition Facts, Health Benefits, and the Science Behind the Holes

Swiss cheese is one of the most nutritionally impressive hard cheeses available — and one of the most distinctive, both visually and nutritionally. At 380 calories per 100g, it provides 137% of daily B12, 68% of calcium, 86% of phosphorus, 35% of zinc, 26% each of riboflavin and selenium, and 27g of complete protein. What sets it apart from other hard cheeses in this collection is its sodium profile: at just 187mg per 100g, Swiss cheese has dramatically less sodium than cheddar (621mg), feta (1,116mg), or parmesan (1,710mg) — making it the lowest-sodium mainstream hard cheese available, a meaningful distinction for anyone monitoring sodium while still wanting the nutritional benefits of hard aged cheese.

And then there are the holes.

Swiss Cheese Nutrition Facts (per 100g)

Swiss Cheese Nutrition Facts (per 28g serving — approximately one slice or small portion)

A single 28g slice provides 38% of daily B12 and 19% of calcium at just 52mg of sodium — making it the most sodium-efficient hard cheese source of these nutrients in our collection.

Vitamins in Swiss Cheese (per 100g)

Standout: Swiss cheese’s B12 content at 137% DV per 100g — rising to 38% DV in a single 28g slice — is one of the highest dairy B12 figures in this collection, exceeding cheddar’s 85% DV and comparable to parmesan’s 50% DV per 100g. This concentration results from the specific bacterial cultures used in Swiss cheese production, which actively produce B12 as a metabolic by-product during the extended fermentation and aging process — making Swiss cheese one of the more B12-rich dairy products specifically due to its distinctive production method. Riboflavin at 26% DV supports FAD/FMN coenzyme function central to cellular energy production.

Minerals in Swiss Cheese (per 100g)

Multiple standouts: Swiss cheese’s mineral profile is genuinely extraordinary. Calcium at 68% DV per 100g is the highest calcium figure of any cheese in our collection apart from parmesan (91% DV) and cheddar (55% DV) — providing over two-thirds of the daily requirement per 100g, in the most bioavailable dietary form available. Phosphorus at 86% DV approaches the full daily requirement and works alongside calcium in the 1.47:1 Ca:P ratio that closely mirrors bone hydroxyapatite’s natural mineral composition. Zinc at 35% DV and selenium at 26% DV round out a profile that makes Swiss cheese one of the most mineral-dense dairy foods available.

The Holes: The Actual Science Behind Switzerland’s Most Famous Feature

The holes in Swiss cheese — properly called “eyes” in cheesemaking terminology — are one of the most distinctive features of any food in this collection and have a genuinely fascinating scientific explanation.

The Three-Bacteria Fermentation

Swiss-style cheeses, particularly Emmental (the original Swiss cheese with large, regular holes), are produced using a three-species bacterial culture — not just the standard mesophilic lactic acid bacteria used in most cheeses, but a third, thermophilic species: Propionibacterium freudenreichii (also called Propionibacterium shermanii).

How the Eyes Form

After the initial lactic acid fermentation and pressing, Swiss cheese undergoes a warm room phase (approximately 18–24°C) for several weeks. During this period, Propionibacterium freudenreichii metabolizes the lactate produced by the initial bacterial fermentation through propionic acid fermentation, producing three significant by-products:

Propionic acid and acetic acid — responsible for Swiss cheese’s characteristic nutty, slightly sweet flavor, which is directly distinct from cheddar’s sharper, more acidic taste.

Carbon dioxide gas — the eyes are formed by this CO₂ gas accumulating within the semi-soft cheese matrix. As the gas accumulates, it creates pockets that round into the characteristic spherical shape due to the pressure and the elastic properties of the surrounding curd. The cheese must be at the right temperature and consistency — not too firm to prevent gas accumulation, not too soft to allow gas to escape — for regular, well-formed eyes to develop.

Why This Biology Matters Nutritionally

The same propionic acid bacteria responsible for the holes are also responsible for Swiss cheese’s elevated B12 content. Propionibacterium freudenreichii is a B12-producing bacterium — it synthesizes the vitamin as part of its metabolic activity during fermentation. This means Swiss cheese’s B12 level (137% DV) is directly connected to the biology that also creates its holes — both are products of the same bacterial fermentation that defines this cheese category.

The Sodium Advantage: The Most Practically Important Distinction

Swiss cheese’s sodium content (187mg per 100g) is dramatically lower than almost every other hard or semi-hard cheese commonly available:

Why Swiss Cheese Has So Little Sodium

Most cheeses achieve their low-acid, preservation, and texture-development goals through significant brining — wheels or slices are submerged in salt brine during production, drawing sodium into the cheese matrix. Swiss-style cheeses like Emmental traditionally use much less brining, relying instead on the propionic acid fermentation’s antimicrobial properties (propionic acid has genuine preservative effects) alongside the cheese’s natural pH to achieve preservation and safety without requiring the heavy salt load used in most other hard cheeses.

The Practical Implication

For anyone who loves hard cheese but monitors sodium intake — whether for blood pressure management, cardiovascular health, or simply dietary awareness — Swiss cheese delivers the full nutritional package of a hard aged cheese (calcium, phosphorus, B12, zinc, complete protein) at a sodium cost that is 3–9 times lower than most alternatives. This is a genuinely meaningful dietary distinction, not a marginal one.

Health Benefits of Swiss Cheese

Outstanding B12 Exceeding the Daily Requirement

At 137% DV per 100g (38% DV in a 28g slice), Swiss cheese provides more than the full daily B12 requirement in a modest serving. B12 is essential for myelin synthesis and neurological health, red blood cell formation, DNA synthesis, and homocysteine regulation. The elevated B12 from Propionibacterium freudenreichii‘s fermentation activity makes Swiss cheese one of the more B12-rich hard cheeses available.

Exceptional Calcium and Phosphorus for Bone Health

At 68% DV calcium and 86% DV phosphorus per 100g — in a Ca:P ratio that closely approximates bone mineral composition — Swiss cheese provides perhaps the most bone-health-targeted mineral combination of any food. Dairy calcium is among the most bioavailable dietary calcium forms, absorbed at approximately 30–35% efficiency, significantly better than most plant-based calcium sources.

Strong Zinc for Immune Function

At 35% DV per 100g (10% per slice), zinc supports immune cell production, testosterone synthesis, wound healing, and the enzymatic processes involved in protein synthesis and cell division — all directly relevant to athletes and active individuals.

Selenium for Antioxidant and Thyroid Function

At 26% DV per 100g, selenium supports the glutathione peroxidase antioxidant enzyme system and the deiodinase-mediated thyroid hormone activation that regulates metabolic rate.

Complete High-Quality Protein

At 27g of complete protein per 100g, Swiss cheese provides all 9 essential amino acids in good proportions, supporting muscle protein synthesis. The casein-dominant protein structure delivers a slower, more sustained amino acid release profile than whey-based proteins.

The Sodium-Conscious Cheese Choice

As detailed above, Swiss cheese’s 187mg sodium per 100g makes it the most sodium-efficient hard cheese option for accessing the calcium, phosphorus, B12, and zinc that make aged dairy nutritionally valuable — delivering these at a sodium cost that is a fraction of most alternatives.

Virtually Lactose-Free

Like all extensively aged hard cheeses, Swiss cheese contains essentially no lactose — the initial bacterial fermentation converts virtually all available lactose to lactic acid, and the extended aging eliminates any remaining trace. Even people with significant lactose intolerance typically tolerate aged Swiss cheese well.

Bioactive Compounds From Propionic Acid Fermentation

The propionic acid and short-chain fatty acids produced during Swiss cheese’s distinctive fermentation carry biological activity beyond their flavor contribution. Propionic acid has documented antimicrobial activity, and research has found propionic acid fermentation by-products associated with gut health benefits, though the amounts consumed from typical cheese servings are modest compared to what would be needed for strong clinical effects.

Swiss Cheese for Athletes and Active People

The Sodium-Efficient Hard Cheese for Regular Use

For athletes who include hard cheese regularly as a calcium and protein source, Swiss cheese allows more frequent inclusion than high-sodium alternatives without meaningfully affecting daily sodium budget. A 28g slice adds 52mg of sodium alongside 19% DV calcium, 24% DV phosphorus, and 7.6g of protein — a nutritionally strong addition to any meal at minimal sodium cost.

B12 for Red Blood Cell Support

The 38% DV B12 per 28g serving supports erythropoiesis — the red blood cell formation that determines oxygen-carrying capacity and directly affects aerobic performance and recovery.

Calcium and Phosphorus for Training-Related Bone Demands

Athletes placing repeated mechanical stress on bone through resistance training and high-impact exercise benefit from reliable calcium and phosphorus availability. Swiss cheese’s combination of 68% DV calcium and 86% DV phosphorus per 100g — in a near-ideal Ca:P ratio — makes it one of the most effective single-food bone mineralization supports available.

Zinc for Recovery and Testosterone

At 35% DV per 100g (10% per slice), zinc contributes to the immune resilience and testosterone production support that matters during heavy training periods where both can be compromised.

Casein Protein for Sustained Amino Acid Supply

The casein-dominant protein structure provides a slower, more sustained amino acid release compared to whey — making Swiss cheese a useful protein source between meals or before overnight fasting periods to support sustained muscle protein synthesis.

Swiss Cheese vs Other Common Hard Cheeses

Swiss cheese leads the group on B12, and achieves strong calcium, phosphorus, and zinc at dramatically lower sodium than any other hard cheese except goat cheese — confirming its position as the best mainstream hard cheese choice for sodium-conscious eaters.

Swiss Cheese vs “Swiss-Style” Cheese: A Labeling Note

Like Parmigiano-Reggiano and other European cheeses, the name “Swiss cheese” (or more specifically “Emmental”) carries geographic protection in the EU — only cheese produced in Switzerland following traditional methods can be labelled Emmental within EU markets. Outside the EU, “Swiss cheese” is a generic category label applied to any Emmental-style cheese regardless of origin, and products labelled “Swiss” in most English-speaking markets outside Europe may be domestically produced.

The nutritional profile described on this page applies broadly to the Emmental style regardless of exact geographic origin, as the defining characteristic — the three-bacteria fermentation including Propionibacterium freudenreichii — produces broadly similar nutritional outcomes across well-made Emmental-style cheeses from any source.

Practical Ways to Include Swiss Cheese in Your Diet

In sandwiches and wraps — Swiss cheese’s mild, nutty flavor and lower sodium make it a versatile sandwich cheese that adds meaningful calcium and B12 without the sodium burden of stronger-flavored alternatives.

Melted in omelettes — Swiss cheese melts cleanly and its mild flavor complements eggs naturally, combining two of the site’s strongest whole-food B12 sources in a single meal.

As a table cheese — sliced alongside whole grain crackers, fruit, and nuts for a nutritionally diverse snacking board that contributes protein, calcium, and B12 alongside the fibre and micronutrients of the accompaniments.

In fondue — the traditional Swiss fondue preparation (melted Swiss cheese with white wine and garlic) uses the cheese’s excellent meltability; the fat in the cheese improves fat-soluble vitamin absorption from any bread or vegetables dipped alongside.

Grated over dishes — Swiss cheese grates more easily from a fresh block than pre-sliced portions and adds a milder flavor note than parmesan or cheddar to soups, pasta, and baked dishes.

Alongside high-iron foods — Swiss cheese’s calcium contributes to the overall dietary calcium-to-iron balance; for anyone specifically maximizing iron absorption from a meal, pairing iron-rich foods with lower-calcium accompaniments (rather than Swiss cheese) is more efficient, since calcium competes with iron for absorption.

Potential Considerations

Saturated fat — at 17g per 100g, Swiss cheese’s saturated fat content is the primary nutritional consideration for people managing cardiovascular risk. The nuanced guidance applied to cheddar throughout this collection applies equally here — moderate portions in an otherwise varied, fiber-rich diet are unlikely to pose meaningful cardiovascular risk for most healthy people.

Dairy allergy — distinct from lactose intolerance; people with a true milk protein allergy must avoid Swiss cheese regardless of its near-zero lactose content.

Vegetarian rennet — traditional Swiss-style cheeses typically use animal rennet. Vegetarian versions using microbial or plant-based rennet are available but less common; check labels if important.

Calcium and iron absorption competition — dairy calcium inhibits non-haem iron absorption when consumed at the same meal. This is a consideration for iron-deficient individuals who need to time dairy consumption away from iron-rich plant meals.