The Himdhara Journal

A1 vs A2 Ghee: How A2 Ghee Differs From Regular Ghee

A2 describes a milk protein that clarification mostly removes. What really separates A2 ghee from regular ghee: the animal's breed and diet, the method and the heat.

By · Journal Editor, Himdhara

· · 9 min read

A glass jar of liquid ghee lit by sunlight

A2 ghee is made from the milk of cattle that carry only the A2 variant of beta-casein, usually indigenous Indian breeds such as Badri, Gir and Sahiwal. Because clarification removes almost all milk protein, the real differences from regular ghee lie in the fat, which follows the animal's breed and diet, and in the method and heat used to make it. The label is a clue about the cow, not a property of the jar.

The A2 label is one of the most prominent claims on the ghee shelf, and one of the least understood. It points at something real in milk, and at something that mostly does not survive into ghee. This article separates the two, so you can tell what you are paying for.

At a glance

  • A1 and A2 are variants of beta-casein, a milk protein, differing by one amino acid at position 67: histidine in A1, proline in A2.
  • A 2017 systematic review in Advances in Nutrition found some evidence that A1 beta-casein is associated with digestive discomfort in some people, and called for more research; it concerned milk, not ghee.
  • FSSAI requires ghee to be at least 99.5 per cent milk fat; the protein leaves with the milk solids, so ghee holds only traces of either variant.
  • Breed does change the fat: a 2025 study found Holstein Friesian ghee higher in polyunsaturated fatty acids than Deoni ghee, whatever the method used.
  • What you can taste in a ghee comes from diet, curd-churning and slow heat, and those are the questions to put to a brand.

What are A1 and A2 beta-casein?

Two versions of one of the main proteins in cow's milk. Beta-casein comes in several genetic variants, of which A1 and A2 are the most common, and they differ at a single position in the protein chain, position 67, where A1 carries the amino acid histidine and A2 carries proline. Which variant a cow produces is set by her genes.

That one substitution changes how the protein breaks down during digestion: A1 beta-casein can release a peptide called beta-casomorphin-7, and A2 releases far less of it. This is the basis of the A2 milk category and of most of the research into it. Most European-origin dairy breeds, such as Holstein Friesian, carry A1, A2 or both; most indigenous Indian breeds carry A2, which is why "A2" on an Indian label is usually shorthand for "from desi cows". We explain the milk itself, and how a cow's A2 status is tested, in what A2 milk is.

What does the research on A1 and A2 milk say?

That the question is real, narrow and unfinished. A 2017 systematic review in Advances in Nutrition examined the published studies comparing the gastrointestinal effects of A1 and A2 beta-casein. It found some evidence that A1 was associated with digestive discomfort in some people, and called for further well-designed human studies. That is a finding about digestion of milk protein, and nothing more.

None of it transfers automatically to ghee, for the reason in the next section, and we found no human study that compared A2 ghee with any other ghee.

Is there any real difference between A1 and A2 ghee?

Only barely. Ghee is clarified butterfat: FSSAI's standard requires at least 99.5 per cent milk fat, with the water cooked off and the milk solids, where the protein sits, browned and strained away. What remains of the beta-casein is a trace, so an honest answer to "is A2 ghee better because it is A2?" is no.

Anyone telling you that A2 ghee digests differently because of its A2 protein is describing milk, not the jar in front of you. That does not make the label meaningless. It is a useful proxy: a genuine A2 ghee almost always comes from indigenous animals, and indigenous animals in India are far more likely to be grazed than stall-fed on compound feed. The label is telling you something about sourcing, just not about protein.

So what actually makes one ghee different from another?

Four things, and the breed's protein variant is the least of them: the animal's diet, its breed as it shapes the fat, whether the ghee was curd-churned or cream-separated, and how hot and how fast it was clarified. All four survive into the jar; the protein does not.

Factor Effect on the finished ghee Can you check it?
Breed's beta-casein (A1 or A2) Minimal once clarified Only by asking for the herd's breed
Breed's effect on the fat Real: a 2025 study found breed changed the fatty acid profile of ghee Only through a fatty acid analysis
Diet and grazing Large: fatty acid profile, carotene, colour and aroma Partly: colour varies with season on grazed milk
Curd-churned or cream-separated Large: aroma, grain and flavour Ask for the milk-to-ghee ratio
Heat and speed of clarification Large: how nutty and browned it tastes By smell and taste

Diet is the one that survives clarification most clearly, because it is written into the fat itself. An animal grazing wild grasses and herbs produces butterfat with a different fatty acid profile and more carotene than an animal on compound feed, which is why grazed ghee is more golden in summer and paler in winter. What the "grass-fed" label does and does not guarantee is in grass-fed ghee meaning.

Breed matters for the fat even though its protein does not. A 2025 study in Food Chemistry: X made ghee from Deoni and Holstein Friesian cows by three methods and found the fatty acid composition differed by breed, with the Holstein Friesian ghee higher in polyunsaturated fatty acids and alpha-linolenic acid, while the method changed the aroma compounds and not the fat.

Method is the next biggest. Curd-churned (bilona) ghee is made by setting whole milk into curd, churning out butter, and clarifying it; cream-separated ghee skips the culturing. In the same 2025 study, the curd route gave higher levels of acids, alcohols, lactones and ketones, the compounds you smell. We compare the two in bilona ghee vs cream ghee and describe ours on the bilona process page.

Heat decides how far the milk solids brown before they are strained off, which is where most of ghee's nutty flavour comes from. Slow clarification over a low fire browns them gently; fast industrial clarification at high heat produces a flatter taste.

How do A2 ghee and regular ghee compare nutritionally?

Very closely, because both are almost entirely fat. USDA's record for clarified butter lists 900 kilocalories, 100 grams of fat and 60 grams of saturated fat per 100 grams; a USDA tablespoon of butter oil weighs 12.8 grams, so a tablespoon of any ghee is roughly 115 kilocalories. The A2 label does not move those numbers.

Where grazed ghee can differ is in the minor components, fat-soluble vitamins and carotene, and the balance of fatty acids, which vary with what the animal ate. Those differences are real but small per spoon, and they depend on sourcing rather than on the A2 label. If a brand makes a specific nutritional claim, ask to see the analysis for the batch. The full nutrient breakdown is in ghee nutrition per tablespoon.

Which questions should you ask an A2 ghee brand?

Four: which breed and region, what the animals eat, how many litres of milk go into a litre of ghee, and whether there is a batch-coded lab report. Those answers describe the jar; the letters A2 describe the cow.

  1. Which breed, and from where? "Desi cow" is not an answer. A specific breed and region is, and Badri cow ghee explained shows what a breed name does and does not tell you.
  2. What do the animals eat? Grazing or stall-feeding matters more to the ghee than the breed's protein variant.
  3. How many litres of milk go into a litre of ghee? Curd-churned cow ghee needs about 30. A brand claiming bilona at a much lower ratio has explaining to do.
  4. Is there a batch-coded lab report? One report reused across every batch tells you nothing about your jar, and no report tests the cow's genes, so none can prove A2 status.

Our own answers are public: Badri cattle grazing the Uttarakhand hills, curd-churned in small batches, with every batch's lab report on the lab reports page. For a longer checklist, see six checks before you buy A2 bilona ghee.

Is A2 ghee worth paying more for?

Pay for what survives into the jar. If a higher price buys you grazed milk, curd-churning and slow clarification, you are paying for differences you can smell and taste. If the only thing separating two jars is the letters A2, you are paying for a protein that the process has already taken out.

For everyday high-heat cooking, a well-made regular ghee does the job. For finishing, over dal, rice or rotis, where aroma matters, a grazed, curd-churned ghee is where the difference shows. You can see ours, with the current batch report, on the A2 bilona ghee page.

The short version

A2 is a property of milk protein, and ghee has almost none left. The label is a fair signal that the milk came from indigenous, often grazed animals, and that, along with curd-churning and slow heat, is what genuinely changes the ghee; breed changes the fat too, as a 2025 study showed, but through fatty acids rather than protein. Judge a jar by its sourcing, method and batch report, not by two letters.

Sources

Further reading behind the figures above. Himdhara's own numbers — yields, batch results — come from our production records and the batch reports on the lab reports page.

Frequently asked questions

Is A2 ghee healthier than regular ghee?

Not because of the A2 label on its own. A1 and A2 describe beta-casein, a milk protein, and clarification removes nearly all of the protein along with the milk solids. What can make one ghee genuinely different from another is the fat itself, which follows the animal's breed and what it ate, and how the ghee was made and heated. No human study has compared A2 ghee with regular ghee.

Does ghee contain A1 or A2 protein at all?

Only in trace amounts. FSSAI's standard requires ghee to be at least 99.5 per cent milk fat, and the beta-casein that carries the A1 or A2 distinction leaves with the milk solids that are strained off at the end of clarification. A finished ghee holds very little of either variant, which is why the label describes the milk rather than the jar.

Why is A2 ghee more expensive than regular ghee?

Mostly because of where the milk comes from and how it is processed, not the protein. A2 ghee usually comes from indigenous breeds that give one to three litres of milk a day, and is often made by curd-churning, which needs about 30 litres of milk per litre of ghee. Both raise the cost of the raw material, and milk is the largest cost in any ghee.

What is the difference between A1 and A2 milk?

One amino acid in beta-casein, one of milk's main proteins: A1 carries histidine at position 67 of the protein chain and A2 carries proline. That changes how the protein breaks down during digestion, and a 2017 systematic review found some evidence that A1 is associated with digestive discomfort in some people, while calling for more research. All of that concerns milk, where the protein is, not ghee.

How can I tell whether an A2 ghee is genuine?

Ask the brand which breed and region the milk comes from, what the animals eat, how many litres of milk go into a litre of ghee, and for a batch-coded lab report from an accredited laboratory. A brand that cannot answer those four questions for the jar you are holding is asking you to trust the label. A lab report tests the ghee, not the cow, so it cannot prove A2 status.