A ghee testing kit can catch only crude adulteration: FSSAI's household DART check finds added starch with a few drops of iodine. Vegetable fat blends need a laboratory, and no kit or standard ghee test shows A2 status, the bilona method or how old a jar is. This article sorts the tests by what each one can and cannot detect.
For a kitchen routine, see how to tell if ghee is pure. Here the question is what "kits" and the laboratory instruments behind them actually measure.
At a glance
- FSSAI's DART guide lists one household test for ghee: 2 to 3 drops of tincture of iodine, where a blue colour shows starch such as mashed potato.
- FSSAI's Manual of Methods detects vanaspati in ghee with concentrated hydrochloric acid and sugar, and notes the test cannot tell sesame oil from vanaspati.
- FSSAI's milk products manual gives butyro-refractometer readings of 40 to 43 for milk fat and above 50 for vegetable oils, but 38 to 39 for coconut oil and 39 to 40 for palm oil.
- A 2023 NDRI laboratory study detected palm oil in cow ghee at 2.5 per cent or more, and sunflower oil at 1 per cent or more, with paper discs.
- FSSAI's ghee standard has no parameter for A2 status or the making method, and sets no peroxide value limit for ghee.
What can a ghee testing kit actually tell you?
A home kit can show that starch, which is not a fat, has been mixed into ghee. A kit cannot reliably show that a cheaper fat has been blended in, because the adulterant and the ghee are both fats. The tests that separate them use acids, heated instruments and chromatography in a laboratory.
"Kit" covers three different things: FSSAI's household check, the quick chemical tests in FSSAI's own manual, which need laboratory reagents, and the laboratory panel in FSSAI's ghee standard. Research groups are also working on rapid tests.
Which ghee tests are in FSSAI's DART guide?
One. FSSAI's DART (Detect Adulteration with Rapid Test) page, which describes itself as common quick tests for detecting some food adulterants at home, lists a single test for ghee: iodine for starch. Its oils and fats section has three more tests, and none of them names ghee.
The ghee test, as published, is short:
- Take ½ teaspoon of ghee or butter in a transparent glass bowl.
- Add 2 to 3 drops of tincture of iodine.
- A blue colour "indicates the presence of mashed potatoes, sweet potatoes and other starches".
That is a real test, and worth doing. But it is a test for starch, so it says nothing about vanaspati, refined vegetable oils or animal body fat blended into the ghee.
Can you test ghee for vanaspati at home?
Not safely, and not conclusively. FSSAI's Manual of Methods for common adulterants tests for vanaspati in ghee with fuming concentrated hydrochloric acid and table sugar. The same manual says concentrated acids should be used only in a fume hood, and that a positive result cannot separate sesame oil from vanaspati.
The procedure adds 5 ml of concentrated hydrochloric acid and half a teaspoon of cane sugar to 5 ml of melted ghee. A red or pink acid layer that persists after water is added indicates vanaspati or sesame oil. The manual notes that the test "does not differentiate between sesame oil and vanaspati", and that some coal tar dyes also give a pink colour.
The test works because of a rule. FSSAI's milk products manual explains that a 1962 notification requires vanaspati to contain at least 5 per cent sesame oil, whose colour-forming constituents are not found in other fats. A blend made with palm oil or animal fat and no sesame oil carries no such marker.
The manual describes its milk product methods as simple enough for college students to carry out in their chemistry laboratories. That is a long way from a kitchen counter.
Which laboratory tests detect vegetable fat in ghee?
FSSAI's ghee standard combines several: the butyro-refractometer (BR) reading at 40°C, the Reichert-Meissl (RM) and Polenske values, the Baudouin test, β-sitosterol and the fatty acid profile. Each catches some fats and misses others, so the results are read together against the standard's limits.
The RM value reflects butyric and caproic acids, and FSSAI's oils and fats manual states that "no other fat contains butyric acid glycerides". β-sitosterol is tested by an RP-HPLC method FSSAI notified in 2019 for vegetable oil in ghee.
| Test | What it detects | What it misses | Home or lab | Source |
|---|---|---|---|---|
| Iodine | Starch, including mashed potato and sweet potato | Any added fat or oil | Home | FSSAI DART |
| Hydrochloric acid and sugar | Sesame oil, and so vanaspati that carries it | Cannot tell sesame oil from vanaspati; some coal tar dyes also turn pink | Lab (fume hood) | FSSAI Manual of Methods, test 24 |
| Baudouin (furfural) | Sesame oil's chromogenic constituents | Fats that contain no sesame oil | Lab | FSSAI milk products manual, 13.6 |
| BR reading at 40°C | Most vegetable oils and fats, which read above 50 | Coconut oil (38 to 39) and palm oil (39 to 40), close to milk fat's 40 to 43 | Lab | FSSAI milk products manual |
| RM and Polenske values | Butyric and caproic acids (RM); caprylic, capric and lauric acids (Polenske) | Not a miss but a false alarm: ghee from animals fed cotton seed can read an RM of about 20 without adulteration | Lab | FSSAI oils and fats manual; milk products manual |
| β-sitosterol by RP-HPLC | Vegetable oil in ghee, by its plant sterol | Says nothing about A2 status, method or age | Lab | FSSAI regulation 2.1.8 |
The BR test is a good example of why a single "machine" cannot settle the question. The milk products manual gives milk fat a reading of 40 to 43 and vegetable oils and fats above 50, a gap wide enough to use as an indicator, "except coconut oil (38 to 39) and palm oil (39 to 40)". The instrument is not simple either: the oils and fats manual asks for its temperature to be held within ±0.1°C.
FSSAI's standard requires ghee to read 40.0 to 44.0 on the BR scale, with an RM value of at least 24.0 and a negative Baudouin test; our guide to reading a ghee lab report explains each limit.
Are there rapid tests for vegetable oil in ghee?
There are research methods, not products. In a 2023 laboratory study, researchers at the National Dairy Research Institute in Karnal made paper discs that detected palm oil added to cow ghee at 2.5 per cent or more and sunflower oil at 1 per cent or more. A 2025 comparison found two chromogenic tests detected palm oil at 5 per cent.
The NDRI discs look for synthetic antioxidants. The authors note that FSSAI's regulations permit antioxidants such as BHA and TBHQ in edible vegetable oils, up to 200 ppm, but not in ghee, so their presence can act as a tracer for added oil. The method extracts the ghee with hexane and acetonitrile first. The researchers spiked ghee from their own dairy with refined oils bought locally, and the discs responded more slowly as stored ghee aged.
The 2025 study by Ramani and colleagues found that a DPPH assay and a ferric-based assay gave quick, qualitative results for palm oil in ghee at 5 per cent. Both studies are laboratory work, and we found no published evaluation of any kit on sale.
What can no ghee testing kit tell you?
Three things buyers most often want to know: whether ghee is A2, whether it was made by the bilona method, and how fresh it is. None of the home checks above answers them, and none of the parameters in FSSAI's ghee standard measures A2 status or the making method. A batch report from an accredited laboratory answers narrower questions.
- A2 status. The ghee standard has no A2 parameter. Why that evidence has to come from the herd and the milk, not the jar, is explained in our article on testing for A2 ghee.
- The bilona method. FSSAI's standard says ghee has a flavour and physical structure that come from its method of manufacture, but none of its parameters records the method. A buyer has to ask the maker.
- Freshness. The standard caps free fatty acids in ghee at 2.0 per cent and sets no peroxide value for ghee, though it sets 0.6 for milk fat. FSSAI's Manual of Methods has a laboratory rancidity test. None of these reads a date.
A laboratory can give you a report on the sample tested, each result beside the legal limit, from a laboratory accredited by NABL for those tests. Our guide on how to get ghee tested in a lab covers which tests to ask for and how to send a sample. Every Himdhara jar carries a batch code, and the laboratory report for each batch is published before that batch ships.
The short version
A home ghee testing kit does one thing well: FSSAI's iodine check shows added starch. Detecting vanaspati needs concentrated acid in a fume hood, and the result cannot tell vanaspati from sesame oil. Vegetable fat blends need a laboratory panel, because each test misses some fats. Paper-disc tests are research, not products, and no kit or standard ghee test shows A2 status, the bilona method or a jar's age.
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.
- Food Safety and Standards Authority of India. Detect Adulteration With Rapid Test (DART), Milk and milk products, test 4. Eat Right India, FSSAI.
- Food Safety and Standards Authority of India. Manual of Methods (rapid tests for common adulterants), test 24, Detection of Vanaspati/Hydrogenated Edible Fat in Ghee, and Edible Oils & Fats, test 1. FSSAI.
- Food Safety and Standards Authority of India (2015). Manual of Methods of Analysis of Foods: Milk and Milk Products, section 13, Ghee; and Manual of Methods of Analysis of Foods: Oils and Fats, sections 5, 13 and 15. FSSAI.
- Food Safety and Standards Authority of India. Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011: Chapter 2.1, Dairy products and analogues, regulation 2.1.8. FSSAI.
- Naik YK, Sharma V, Arora S, Seth R (2023). Development and application of DPPH impregnated paper based color sensor disc to detect vegetable oils addition in cow ghee. Journal of Food Science and Technology; and Ramani A and colleagues (2025). Comprehensive Studies on Detection of Palm Oil Adulteration in Clarified Milk Fat (Ghee). International Journal of Food Science.