Nutrition Facts — Interactive Label
Select a chhurpi variety to see its complete nutrition facts. All data is sourced from peer-reviewed scientific literature. Values represent ranges compiled from multiple studies; individual products may vary by milk source, production method, and aging duration.
Hard Chhurpi (Yak Milk) · Aged
Key Nutrient Comparison — Hard vs. Soft Chhurpi
The following chart illustrates how the drying process concentrates nutrients from soft (fresh) chhurpi to hard (aged) chhurpi. Values are expressed as percentage of typical adult daily requirements per 100g serving.
Cross-Variety Nutritional Comparison
The following table compares nutritional profiles across chhurpi varieties and contextualises them against common reference dairy foods. Data per 100g serving.
| Nutrient | Hard Chhurpi Yak Milk · Aged |
Soft Chhurpi Yak Milk · Fresh |
Cow-Milk Chhurpi Mixed · Semi-dried |
Parmesan Ref. Hard Cheese |
Paneer Ref. Fresh Cheese |
|---|---|---|---|---|---|
| Energy (kcal) | 250–300 | ~160 | ~180 | ~431 | ~321 |
| Protein (g) | 40–53 | 18–22 | 22–35 | ~38 | ~25 |
| Total Fat (g) | 5–10 | 8–12 | 5–8 | ~29 | ~25 |
| Saturated Fat (g) | 3–6 | 5–8 | 3–5 | ~19 | ~16 |
| Carbohydrates (g) | 2–4 | 3–5 | 3–5 | ~3.2 | ~3.6 |
| Calcium (mg) | 600–900 | ~300 | ~350 | ~1184 | ~208 |
| Phosphorus (mg) | ~500 | ~200 | ~250 | ~694 | ~397 |
| Moisture (%) | <15 | 60–70 | 40–55 | ~29 | ~54 |
| CLA Content | Present (yak-derived) | Present | Trace / Absent | Present (cow) | Trace |
| Shelf life (unrefrig.) | Months–Years | 2–5 days | Days–weeks | Weeks (wrapped) | 3–5 days |
| Rennet used | No | No | No | Yes | No |
Nutrient Deep Dive
Click any nutrient below to expand full scientific context — why it is present in such high concentrations, what the research says about its significance, and how it compares to other food sources.
Protein is chhurpi's defining nutritional characteristic. The extraordinary concentration — up to 53g per 100g — results from two sequential concentration processes: first, butter extraction removes most of the milk fat while leaving the casein protein fraction intact; second, prolonged drying removes 85%+ of the moisture, concentrating all remaining solids including protein.
The protein in chhurpi is predominantly casein (approximately 80%) with the remainder being whey proteins that co-precipitate during acid coagulation at elevated temperature. Casein provides a slow, sustained release of amino acids — supporting the gradual energy needs of high-altitude trekking far more effectively than fast-releasing proteins.
The amino acid profile of yak milk casein is favourable, with all essential amino acids present. Studies by ICAR-NRCY have confirmed that chhurpi's protein digestibility, while slightly lower than fresh milk protein due to heat treatment and drying, remains nutritionally significant. Hard chhurpi consumed over 2–4 hours of slow chewing provides a sustained protein delivery that mirrors the time-release supplement concept.
Calcium is chhurpi's second most remarkable nutritional feature. At 600–900mg per 100g, hard chhurpi provides up to 90% of the adult daily recommended calcium intake (1,000mg) in a single serving. For highland communities where dairy is the primary or only significant calcium source, chhurpi plays an irreplaceable role in bone health maintenance.
The calcium in chhurpi is primarily bound to casein phosphopeptides — a form that research suggests may have superior bioavailability compared to calcium from other food sources. The simultaneous presence of phosphorus (which assists calcium absorption) and Vitamin D (present in yak milk from high-altitude solar exposure during grazing) further enhances calcium utilisation.
At high altitude, calcium metabolism presents specific challenges: reduced physical activity in cold months, vitamin D synthesis variations, and the physiological demands of the body's cold-weather adaptation all affect bone mineral density. Traditional highland diets built around chhurpi consumption may provide a nutritional explanation for the remarkable physical resilience historically observed in Sherpa and Bhutia communities.
Conjugated Linoleic Acid (CLA) is a naturally occurring trans fat found in the milk and meat of ruminants — and yak milk contains notably higher CLA concentrations than standard bovine milk, particularly during the summer grazing season when animals consume diverse high-altitude grasses and wildflowers.
CLA has been the subject of substantial nutritional research since the 1980s. The most consistently replicated findings associate CLA consumption with potential anti-inflammatory effects, possible modulation of body composition (favouring lean mass over fat mass), and immunomodulatory properties. It is important to note that most human intervention studies have used CLA supplements at doses higher than would typically be consumed through food — the extrapolation to food-source CLA at typical dietary doses requires caution.
The CLA content of chhurpi made from yak milk is an area where dedicated research is significantly lacking. Most CLA data in the literature relates to cow-milk dairy products. Yak milk's higher grass-fed fatty acid profile suggests its CLA content should be at least comparable to — and potentially higher than — the most CLA-rich cow milk products (such as pasture-raised Jersey dairy). This is a priority research gap.
Vitamin B12 (cobalamin) is an essential micronutrient found almost exclusively in animal-derived foods. It is critical for neurological function, red blood cell formation, and DNA synthesis. B12 deficiency is among the most common micronutrient deficiencies globally, particularly affecting populations with limited access to diverse animal foods.
For highland communities whose plant-based food options are severely limited by altitude and growing season, chhurpi represents a year-round B12 source of significant nutritional importance. The drying process that creates hard chhurpi preserves B12 effectively — unlike heat-sensitive vitamins such as C or folate, B12 is relatively stable to the moderate temperatures involved in chhurpi production.
Precise quantitative B12 data specific to chhurpi is limited in the published literature. The estimates provided here are derived from yak milk B12 concentrations (which are in the range of 3–5 μg per litre) adjusted for the protein concentration factor of hard chhurpi (approximately 3–4× concentration relative to liquid milk). Dedicated analytical studies are needed for definitive figures.
Zinc and phosphorus are two additional micronutrients present in nutritionally significant quantities in hard chhurpi. Zinc (~3mg per 100g, approximately 27% DV) supports immune function, wound healing, protein synthesis, and cognitive function — all particularly relevant in the physically demanding, infection-exposed environment of high-altitude pastoral life.
Phosphorus (~500mg per 100g, approximately 40% DV) works synergistically with calcium in bone mineralisation and is involved in energy metabolism through its role in ATP synthesis. The calcium-to-phosphorus ratio in chhurpi is approximately 1.5:1 — within the optimal range for bone health maintenance. This ratio, found naturally in dairy products, contrasts with many processed foods where excess phosphorus relative to calcium can negatively affect bone mineral density.
The Nutritional Logic of Chhurpi
Understanding why chhurpi is nutritionally exceptional requires understanding the production logic that creates it. Every step of the traditional process — from the decision to remove butter before coagulation, to the choice of weeks-to-years of drying — has a direct and measurable consequence on the final nutritional profile.
The butter removal step is perhaps the most consequential. By extracting the butter (mar) first, producers are not simply making a fat-reduced product — they are concentrating the protein fraction relative to total solids. The residual tara (skimmed milk) contains nearly all the original milk's protein and calcium, but only a fraction of its fat. When this protein-enriched substrate is subsequently coagulated, pressed, and dried, the concentration effect compounds: each step of moisture removal increases the protein-to-weight ratio of the final product.
"The highland communities who developed chhurpi were not nutritionists. They were pragmatists. They needed a food that was portable, durable, and sufficient to sustain days of physical exertion at altitude. What they produced, by necessity and observation, happens to be one of the most nutritionally concentrated natural foods we know of."
— Prof. Jyoti P. Tamang, Himalayan Fermented Foods (2010)The Altitude Factor
The nutritional value of chhurpi cannot be fully appreciated without considering the altitude context in which it is produced and consumed. At elevations above 3,000 metres, the human body faces a constellation of physiological stresses: reduced oxygen availability (hypoxia), elevated UV radiation, cold temperatures, and the caloric demands of sustained physical labour in challenging terrain. These stresses create nutritional needs that are meaningfully different from those at sea level.
Protein needs are elevated at altitude — partly due to increased muscle catabolism under hypoxic conditions, and partly due to the energy demands of thermoregulation in cold environments. Calcium requirements for bone health are complicated by vitamin D availability and physical activity patterns. The B12 needs of communities with limited plant-food diversity are pressing. Hard chhurpi, consumed as a portable slow-chew over hours of trekking or herding, addresses all of these needs in a form perfectly adapted to high-altitude life: lightweight, non-perishable, requiring no fuel to prepare, and delivering protein, calcium, and B vitamins continuously over time.