# Too Much Foam When You Shake Milk? FSSAI's Simple Home Test Flags Possible Detergent Mixing

> FSSAI has shared a simple home test that checks for possible detergent adulteration in milk by shaking it and observing the foam or bubbles that form.

**Type:** article · **Category:** Food · **Published:** 2026-09-06 · **Source:** TrendKia
**Canonical:** https://trendkia.com/en/food/dudha-hilane-para-banane-lage-jyada-jhaga-fssai-ke-isa-testa-se-ghara-para-pahachanen-ditarjenta-milavata-28663 · **Language:** English
**Tags:** Milk Adulteration, FSSAI Test, Detergent In Milk, Milk Purity Test, Food Safety, Milk Purity

Milk sits on Indian dining tables from the time a baby turns six months old right through old age, prized for decades as a natural tonic for strong bones. It has moved well beyond the morning cup of tea or coffee and now finds its way into all sorts of cooking, while plenty of people still drink it straight. But that everyday trust turns risky the moment the milk bought from the market turns out to be adulterated, because it can do more harm than good.

## Detergent, not just water, is turning up in milk
Reports of adulteration in milk and milk-based products keep surfacing every now and then, which is why checking purity before use has become essential. What is alarming is that some sellers are mixing in not just water but detergent-like substances as well. To tackle this, the Food Safety and Standards Authority of India, FSSAI, has shared an easy home test to check for possible detergent adulteration in milk. The authority has clarified that this home check can only offer an early warning sign, and a proper laboratory test remains necessary to confirm any adulteration for certain.

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## How FSSAI demonstrated the test on Instagram
FSSAI shared the testing method through a video posted on its Instagram handle, @fssai_safefood. The process needs barely anything, just a small quantity of milk. Start by pouring roughly 5 to 10 millilitres of milk into a small glass. Then shake the glass briskly and thoroughly for a few seconds. Right after shaking, watch closely for any foam or bubbles forming on the surface of the milk.

## What the bubbles can tell you
If the milk does not produce excessive foam after shaking, or if whatever foam forms settles quickly, that can be taken as a normal sign. But if a good amount of foam or bubbles form and they refuse to settle easily, it could point to the presence of a detergent-like substance. FSSAI has been clear, though, that this home test alone cannot be used to officially declare a batch of milk adulterated, a laboratory test is still the final word.

## The science behind why bubbles form at all
The explanation lies in basic chemistry. Pure milk naturally has high surface tension, so the tiny air pockets created while shaking it collapse almost instantly. Detergents and soaps, on the other hand, contain surfactants that lower surface tension. This creates a thin film between air and water, which lets foam and bubbles hold their shape and linger for much longer.

## What to check before buying milk
To stay safe from adulteration, always buy milk from a trusted brand that follows the rules. Before picking up a packet or carton, check its seal, packaging and the details printed on the label. If the packaging looks tampered with or damaged in any way, avoid buying it altogether. Also look out for the FSSAI licence number printed on the packet along with the related details. Finally, store milk at the right temperature and follow the storage and expiry instructions mentioned on the packaging.

## What this means for you
This test matters straight away for your kitchen and your health, since adulterated milk used every day can end up causing harm rather than good.

- **Instant checking at home:** Every packet or loose milk bought from the market can now get an early check without sending it to a lab. Shaking just 5-10 millilitres and watching the foam gives an initial idea.
- **Affects children and the elderly alike:** Milk is consumed by everyone from a six-month-old baby to the elderly, so the risk from adulteration touches every age group in a household. This shake test can now become a habit whenever milk is bought.
- **A lab test is still needed for certainty:** Milk cannot be declared adulterated on the basis of the home test alone. If there is doubt, sending a sample to a nearby lab is the right next step.
- **Be alert while buying packets:** Checking the seal, packaging, label and the FSSAI licence number should now become a routine habit. Skip any packet that looks tampered with or damaged.
- **Watch the storage details:** Ignoring the storage and expiry information printed on the packet can spoil milk faster, so it should always be stored at the right temperature.

## Questions & Answers

### 1. How can adulteration in milk be checked at home?
Take about 5 to 10 millilitres of milk in a small glass, shake it briskly and watch the foam or bubbles that form.

### 2. What does excessive foam in milk indicate?
If a lot of foam forms after shaking and it does not settle quickly, it could point to the presence of a detergent-like substance.

### 3. Is this home test completely reliable?
No, according to FSSAI it only gives an early sign, and a laboratory test is required to confirm adulteration for certain.

### 4. Why do bubbles in pure milk settle quickly?
Pure milk has high surface tension, which makes the air pockets formed while shaking collapse quickly.

### 5. Where did FSSAI share this test?
FSSAI shared the method through a video posted on its Instagram handle, @fssai_safefood.

### 6. What should be checked while buying milk?
Check the packet's seal, packaging, label, the FSSAI licence number and the storage and expiry information.

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