Cheddar Cheese: Nutrition Facts, Health Benefits, and the Complete Guide to One of the World’s Most Popular Foods

Cheddar is one of the world’s most popular cheeses — and one of the most nutritionally misunderstood. It has been simultaneously celebrated as one of the best whole food sources of calcium, protein, and B12 available, and dismissed as an indulgent high-fat, high-sodium food to be eaten with guilt. The reality sits in nuanced territory that neither position captures fully.

Per 100g, cheddar cheese provides 54% of daily calcium, 51% of selenium, 44% of Vitamin B12, 37% of phosphorus, 35% of Vitamin A, 34% of riboflavin, and 33% of zinc — in one of the most flavorful, satisfying, and versatile foods there is. The saturated fat and sodium content are real considerations that deserve honest discussion — but they exist alongside genuine nutritional value that makes cheddar a legitimate part of a balanced diet rather than simply an indulgence to minimize.

Cheddar Cheese Nutrition Facts (per 100g)

Cheddar Cheese Nutrition Facts (per 30g serving — approximately one slice or a matchbox-sized piece)

A standard serving of cheddar is approximately 30g — a single slice or a piece roughly the size of a matchbox:

Vitamins in Cheddar Cheese (per 100g)

* Value from USDA’s SR Legacy data, where the Foundation Foods entry doesn’t include it.

Multiple standouts: Cheddar is a significant dietary source of Vitamin B12 — 44% of the daily value per 100g. B12 is found almost exclusively in animal foods and is essential for myelin synthesis, neurological health, red blood cell formation, and DNA synthesis; deficiency is common, particularly in older adults, whose ability to absorb B12 from food declines with age. Cheddar also provides strong riboflavin (B2) at 34% DV — essential for energy metabolism and antioxidant enzyme function — and Vitamin A at 35% DV, carried in the milk fat. Its Vitamin D (5% DV) is a modest bonus.

Minerals in Cheddar Cheese (per 100g)

Multiple standouts: Cheddar’s mineral profile is led by 54% of daily calcium and 37% of daily phosphorus per 100g — the two main structural minerals of bone, both present in substantial amounts. Selenium at 51% DV supports glutathione peroxidase antioxidant defense and thyroid hormone activation, while zinc (33% DV) supports immune function, protein synthesis, and testosterone production.

How Cheddar is Made: Why Aged Cheese is Nutritionally Different

Understanding how cheddar is produced explains several of its most important nutritional properties — particularly why it’s so much lower in lactose than milk and why aging changes its flavor and texture.

The Cheesemaking Process

Cheddar begins with cow’s milk. Starter bacterial cultures are added to convert some of the lactose (milk sugar) into lactic acid — the first step in developing cheddar’s distinctive tangy flavor.

Rennet is then added to coagulate the milk proteins — primarily casein — into curds. The whey, which carries away most of the milk’s lactose and much of its water-soluble vitamins, is drained off.

The curds are then “cheddared” — a distinctive process of repeatedly cutting and stacking the curd slabs to expel more whey and develop texture — before being milled, salted (the source of most of cheddar’s sodium), pressed into molds, and aged. During aging, bacteria ferment almost all the remaining lactose.

How Aging Changes Cheddar

Aging duration significantly affects cheddar’s flavor and texture (age categories vary somewhat by country and producer):

Mild cheddar (around 3–6 months) — softer, creamier texture, milder flavor, and slightly higher moisture than aged varieties.

Medium cheddar (around 6–12 months) — balanced sharpness and creaminess.

Mature/sharp cheddar (around 12–18 months) — more pronounced flavor from further breakdown of protein and fat by bacterial enzymes. Higher in free glutamate (a natural umami compound) and more intensely flavored — meaning smaller quantities satisfy the palate. Slightly drier, with marginally higher protein per 100g.

Extra mature/vintage cheddar (18–24+ months) — the most intense flavor and driest, most crumbly texture. The crunchy crystals come partly from the amino acid tyrosine, released as proteins break down during long aging, and partly from calcium lactate. The strong flavor per gram often leads to smaller portions.

The Lactose Question

This is important for the millions of people with lactose intolerance who believe they can’t eat dairy:

Aged cheddar is virtually lactose-free. Most of the milk’s lactose leaves with the whey, and bacteria ferment almost all of what remains during aging. Aged cheddars typically contain only trace amounts of lactose — well below the amount that causes symptoms in most lactose-intolerant people.

Research shows that most people with lactose intolerance can eat aged hard cheeses including cheddar without symptoms. This makes cheddar one of the most accessible dairy foods for the roughly two-thirds of the world’s adults with reduced lactase activity.

The Saturated Fat Question: An Honest, Nuanced Discussion

The most significant nutritional concern about cheddar is its saturated fat — 19.2g per 100g, making it one of the higher saturated fat foods commonly eaten. This deserves honest, evidence-based discussion rather than either dismissal or alarm.

The Traditional View

Dietary guidelines recommend limiting saturated fat — based on research showing saturated fat raises LDL cholesterol, and elevated LDL is a cause of cardiovascular disease. Under this framework, cheddar’s high saturated fat content makes it a food to limit.

The Emerging Nuance

The relationship between cheese and cardiovascular disease turns out to be more complex than its saturated fat content alone would suggest:

The food matrix matters. Saturated fat eaten within the complex structure of cheese — alongside protein, calcium, and phosphorus — appears to behave differently from the same fat in other foods. In trials, cheese raises LDL cholesterol less than butter with the same fat content, and large meta-analyses of observational studies have found cheese consumption to be neutral or even associated with slightly lower cardiovascular risk.

The replacement food matters. What replaces saturated fat determines whether cutting it helps. Replacing it with unsaturated fats lowers cardiovascular risk, but replacing it with refined carbohydrates does not appear to.

Dairy fat has a distinctive composition. Dairy fat contains odd-chain saturated fatty acids (pentadecanoic and heptadecanoic acid) whose blood levels have been associated with lower type 2 diabetes risk in prospective studies — though whether they cause that benefit is still being researched.

The calcium connection. Cheese’s high calcium binds some fatty acids in the gut, so slightly more fat is excreted rather than absorbed — one possible reason cheese has a smaller effect on blood lipids than its fat content predicts.

The honest conclusion: Cheddar’s saturated fat is a real consideration — particularly for people with existing cardiovascular disease, high LDL, or familial hypercholesterolaemia. For most healthy people, moderate cheddar consumption (around 30–40g per day) as part of a balanced diet with plenty of vegetables, lean protein, and whole grains is unlikely to meaningfully raise cardiovascular risk — and its nutritional benefits (calcium, protein, B12, selenium) are genuine.

Health Benefits of Cheddar Cheese

Outstanding Calcium for Bone Health

At 54% of daily calcium per 100g — 16% per standard 30g serving — cheddar is one of the most calcium-dense foods available. Around 30% of the calcium in dairy is absorbed — similar to or better than most plant sources, where phytates and oxalates reduce absorption (some low-oxalate greens such as kale and bok choy are absorbed even better, but contain far less calcium per serving).

Calcium is essential for:

• Bone mineral density — about 99% of the body’s calcium is in bones and teeth as hydroxyapatite
• Muscle contraction — calcium release from the sarcoplasmic reticulum initiates every muscle contraction
• Nerve transmission — calcium ions are essential for neurotransmitter release at synapses
• Blood clotting — calcium is a required cofactor in the coagulation cascade
• Hormone secretion — calcium signalling regulates numerous hormonal processes

For people concerned about bone density — particularly older adults, postmenopausal women, and athletes with high bone stress — cheddar is a practical calcium source. A 30g serving with a meal contributes 16% of daily calcium with 122 calories and 7g of protein.

Calcium and Phosphorus Together

Cheddar provides both of bone’s two main minerals in substantial amounts — 54% DV calcium and 37% DV phosphorus per 100g — alongside protein, which bone also needs for its collagen framework. Calcium and phosphorus together make up hydroxyapatite, the mineral that gives bone its strength.

Complete High-Quality Protein

At 23.3g of protein per 100g, cheddar provides complete animal protein containing all 9 essential amino acids. Cheddar’s protein is mostly casein — the same slow-digesting protein in casein protein supplements — since most of the whey proteins drain away during cheesemaking.

During aging, bacterial enzymes break some of the casein down into smaller peptides and free amino acids (proteolysis), which contributes to aged cheddar’s complex, savory flavor.

For muscle building and recovery, 30g of cheddar contributes 7g of complete protein — a useful addition to daily protein targets, particularly as part of a meal. See our protein for muscle building guide for complete protein requirements.

Significant Vitamin B12 Content

At 44% of daily B12 per 100g (13% per 30g serving), cheddar is a practically significant B12 source — particularly for people who don’t regularly eat meat or fish. For vegetarians who eat dairy, cheese is one of the most important B12 sources in the diet.

B12 is essential for myelin synthesis (the protective sheath around nerve fibers), red blood cell formation, DNA synthesis, and homocysteine metabolism. Deficiency can cause megaloblastic anaemia and neurological damage — including peripheral neuropathy and cognitive problems — that may become permanent if it goes untreated, making regular B12 intake genuinely important for long-term health.

Riboflavin for Energy Metabolism

At 34% of daily riboflavin (B2) per 100g, cheddar is a strong riboflavin source — and dairy foods are among the leading sources of riboflavin in Western diets.

Riboflavin is essential for:

• FAD and FMN coenzyme synthesis — critical components of the electron transport chain and energy production
• Converting other B vitamins (B6, folate, niacin) to their active forms
• Glutathione reductase function — regenerating the body’s primary antioxidant
• Fatty acid oxidation — one of the body’s main energy-producing pathways

Selenium for Antioxidant Defense

At 51% DV per 100g (15% per 30g serving), cheddar is a surprisingly strong selenium source, supporting glutathione peroxidase antioxidant enzymes and thyroid hormone activation.

Conjugated Linoleic Acid (CLA)

Cheddar contains small amounts of conjugated linoleic acid (CLA) — a fatty acid found mainly in meat and dairy from ruminant animals. CLA supplements have been studied for body composition, with some trials finding modest reductions in body fat, and CLA has shown anti-cancer effects in animal studies. However, those trials used supplement doses of several grams a day — far more than any normal amount of cheese provides — and human evidence for anti-cancer effects is lacking. Milk from grass-fed cows typically contains considerably more CLA than milk from grain-fed cows.

Gut Health — The Fermentation Story

Cheddar is a fermented food — produced through bacterial fermentation that transforms milk into a long-lasting, flavor-complex product. The bacterial cultures used in cheesemaking (primarily Lactococcus lactis and related species) produce:

Lactic acid — which creates cheddar’s tangy flavor and inhibits harmful bacteria through acidification.

Bioactive peptides — protein breakdown during aging produces casein-derived peptides, some of which show blood pressure-lowering (ACE-inhibiting), immune-modulating, and antimicrobial activity in laboratory research. Their effects in people eating normal amounts of cheese are less clear.

Live bacteria — aged cheddar can still contain large numbers of live lactic acid bacteria, including types that grow during ripening. They aren’t standardized probiotic strains in the way some yogurts and kefirs contain, so cheddar shouldn’t be thought of as a probiotic supplement, but it is a genuinely fermented, bacteria-rich food.

Dental Health

Cheese has documented dental benefits, and cheddar has been studied directly. Eating cheese after acidic or sugary foods raises the pH in the mouth and has been found to reduce enamel damage. The mechanisms include:

Calcium and phosphorus remineralization — calcium and phosphate released from cheese help remineralize tooth enamel that has been softened by acid.

pH neutralization — chewing cheese stimulates saliva, which neutralizes acids from food and drink.

Casein phosphopeptides — casein fragments bind to tooth surfaces and help prevent demineralization — the same mechanism used in some casein-based dental products.

The traditional practice of serving cheese at the end of a meal has genuine dental health justification beyond culinary tradition.

Cheddar Cheese for Athletes and Active People

Calcium and Phosphorus for Bone Resilience

Training stimulates bone remodeling, and bone formation needs adequate calcium and phosphorus as raw materials. Cheddar’s 54% calcium and 37% phosphorus per 100g make it a practical whole-food contributor. Adequate calcium and vitamin D have been linked with fewer stress fractures in studies of military recruits in heavy training — and cheddar can help athletes reach their calcium targets.

Casein Protein for Overnight Recovery

Casein digests slowly, releasing amino acids gradually over several hours — which is why casein protein supplements are popular before bed.

Research led by Professor Luc van Loon has shown that protein taken before sleep increases overnight muscle protein synthesis. Cottage cheese is the whole-food casein source most studied for this purpose; cheddar’s protein is also mostly casein, though it hasn’t been tested in the same way. 30–40g of cheddar before bed provides 7–9g of protein.

Complete Protein for Daily Targets

A 30g serving of cheddar with any meal contributes 7g of complete protein — a practical and enjoyable way to boost protein at meals where lean protein sources are limited.

Almost No Carbohydrates for Flexible Dieting

At just 2.4g of carbohydrates per 100g (0.7g per 30g serving), cheddar is almost carbohydrate-free — easily compatible with ketogenic, low-carbohydrate, and carb-cycling approaches.

Energy Density for Muscle Building Phases

At 408 kcal per 100g, cheddar is calorie-dense — useful for athletes in muscle-building phases who need to consistently hit a calorie surplus. A 40g serving adds 163 calories, 9.3g of protein, 22% of daily calcium, and 15% of daily phosphorus to any meal with no preparation.

B12 and Riboflavin for Energy Metabolism

Riboflavin (FAD/FMN for the electron transport chain) and B12 (for red blood cell formation and oxygen transport) both support the energy systems training depends on. Cheddar’s 34% DV riboflavin and 44% DV B12 per 100g help athletes meet these needs.

The Sodium Consideration

At 654mg of sodium per 100g, cheddar is a significant source of sodium — a standard 30g serving provides 196mg, roughly 9% of the 2,300mg daily limit.

Context for active people: athletes who train hard in warm conditions can lose 1,000mg or more of sodium per hour through sweat. For these people, the sodium in moderate cheddar consumption helps replace sweat losses rather than being purely excess intake.

Context for people managing blood pressure: high sodium intake raises blood pressure, especially in sodium-sensitive people. People with hypertension or cardiovascular disease should account for cheddar’s sodium in their daily intake — 30g adds about 196mg, which is manageable within a 2,300mg daily limit when the overall diet is sodium-aware.

Lower-sodium alternatives: reduced-sodium cheddars contain at least 25% less sodium than standard cheddar. Swiss cheese is a much lower-sodium option, with under a third of cheddar’s sodium, and whole-milk mozzarella is somewhat lower.

Cheddar vs. Other Common Cheeses

Cheddar holds its own in this comparison — strong calcium, protein, B12, and selenium, with sodium and saturated fat that call for moderation but are comparable to many popular alternatives. Parmesan beats cheddar on calcium and protein but carries nearly twice the sodium. Swiss cheese has far less sodium than cheddar, with more calcium and protein — worth knowing for anyone managing sodium. Mozzarella and feta are lower in calories, though feta is much saltier, and cottage cheese is the clear winner for protein per calorie.

Different Types of Cheddar

Mild cheddar — aged around 3–6 months. Softer texture, creamier flavor, slightly lower in protein and higher in moisture than aged varieties. Good melting properties. Best for sandwiches and cooking.

Mature/sharp cheddar — aged around 12–18 months. Firmer, more crumbly texture and a pronounced tangy flavor, with slightly more protein per 100g from moisture loss.

Extra mature/vintage cheddar — aged 18–24+ months. Intense flavor, dry crumbly texture, and crunchy crystals. The strongest flavor per gram, which often means smaller portions are satisfying.

Smoked cheddar — cold or hot smoked after aging, with a distinctive smoky flavor. Nutritionally similar to unsmoked cheddar.

Reduced-fat cheddar — made with lower-fat milk, so it’s noticeably lower in fat and calories, and also lower in the fat-soluble vitamins (such as Vitamin A) carried in milk fat. Some people find it less flavorful and end up eating more, which can offset part of the calorie saving.

Grass-fed cheddar — made from the milk of pasture-raised cows. Typically higher in CLA, omega-3 fatty acids, and beta-carotene (which gives it a deeper yellow color) than cheddar from grain-fed cows — a modest nutritional upgrade for people who eat cheddar regularly.

Cheddar Cheese and Lactose Intolerance: The Full Picture

This is one of the most practically important sections on this page because it affects hundreds of millions of people worldwide.

The problem: roughly two-thirds of adults worldwide have reduced lactase activity — the enzyme needed to digest lactose (milk sugar). This can cause bloating, gas, cramping, and diarrhea after lactose-containing dairy.

The cheddar solution: as described above, cheesemaking removes almost all the lactose from aged cheddar through:

1. Whey drainage, which removes most of the milk’s lactose
2. Bacterial fermentation during aging, which converts almost all of the remainder into lactic acid

Aged cheddar typically contains only trace amounts of lactose — below the amount that triggers symptoms in most lactose-intolerant people. Research confirms that most people with lactose intolerance can eat aged hard cheeses without digestive problems.

The practical implication: most people who believe they must avoid all dairy because of lactose intolerance can eat normal portions of aged cheddar — getting its calcium, protein, B12, and selenium without the discomfort they experience with milk, ice cream, or soft fresh cheeses.

How to Include Cheddar in a Balanced Diet

Portion guidance: a standard serving of 30–40g (about one to one and a half slices) provides genuine nutritional value at around 120–160 calories — meaningful calcium, protein, B12, and selenium without excessive saturated fat or sodium.

With whole grain crackers — cheddar’s calcium and protein paired with the fiber and complex carbohydrates of whole grain crackers makes a nutritionally complementary snack.

On eggs — melted cheddar on scrambled or poached eggs combines cheddar’s casein with eggs’ complete protein, choline, and fat-soluble vitamins.

In omelettes — 30g of cheddar in a vegetable omelette makes a micronutrient-dense meal combining calcium, phosphorus, B12, choline, Vitamin K from leafy vegetables, iron from the eggs and greens, and complete protein.

As a pre-sleep snack — 30–40g of cheddar before bed provides mostly casein protein alongside 16–22% of daily calcium and 13–18% of daily B12.

On baked sweet potato — cheddar’s calcium and protein combine well with sweet potato’s beta-carotene, potassium, and complex carbohydrates for a balanced meal with complementary nutrients.

In soups and sauces — grating mature cheddar into soups, pasta sauces, or vegetable dishes adds intense flavor from relatively small quantities — a tablespoon of finely grated mature cheddar goes further than a slice of mild cheddar.

Potential Considerations

Saturated fat and cardiovascular health — as discussed above. For most healthy people, moderate consumption (around 30–40g per day) within a balanced diet is unlikely to meaningfully increase cardiovascular risk. People with existing cardiovascular disease, familial hypercholesterolaemia, or other risk factors should discuss dairy intake with their healthcare provider.

Sodium and blood pressure — 654mg per 100g calls for awareness for people managing hypertension. Accounting for cheddar’s sodium within a daily 2,300mg budget is straightforward at moderate portions, and reduced-sodium cheddar and Swiss cheese are lower-sodium alternatives.

Calorie density for weight management — at 408 kcal per 100g, portion awareness matters. Weighing rather than estimating portions is particularly useful with cheese, since small extra amounts add calories quickly.

Dairy allergy — distinct from lactose intolerance, dairy allergy is an immune reaction to milk proteins (casein and/or whey). People with dairy allergy must avoid all dairy, including cheddar, regardless of its lactose content.

Pregnancy — pasteurized cheddar is considered safe during pregnancy. Advice on unpasteurized hard cheeses varies by country: the UK’s NHS considers hard cheeses like cheddar safe even when unpasteurized, while US guidance is to avoid unpasteurized cheeses.

Vitamin K2 and warfarin — cheese contains Vitamin K2 (menaquinones) produced by bacteria during fermentation. People taking warfarin should keep their intake of cheese and other vitamin K foods consistent rather than changing it dramatically, to help keep their INR stable.

Nutrient data: USDA FoodData Central, Foundation Foods (FDC ID 328637); values marked * from SR Legacy (FDC ID 170899). Comparison cheeses from Foundation Foods where available — Swiss (FDC ID 746767) and feta (FDC ID 2259796) — and otherwise SR Legacy: parmesan, hard (FDC ID 170848), mozzarella, whole milk (FDC ID 170845), and creamed cottage cheese (FDC ID 172179). % Daily Values use the FDA’s current Daily Values.