Home » 6 Tips For How to Tell if Yoghurt is Bad [Updated] 2022

6 Tips For How to Tell if Yoghurt is Bad [Updated] 2022

Yoghurt is not just delicious but nutritious too. As it is made from live starter culture or lactic bacteria by fermenting the fresh milk, it does not get spoiled quickly. However, it does not mean that it cannot turn bad. How to tell if yoghurt is bad – is a tricky question.

How Does Yoghurt Turn Vad?

The presence of bacteria in yoghurt can turn it bad if the yoghurt I not kept at the right temperature. The bacteria used to ferment the milk converts the milk sugar into lactic acid and solidify it to make yoghurt. Hence, these bacteria are added at a specific temperature to the pasteurized milk to act fast. Therefore, different kinds of yoghurts have different expiration dates.

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How to tell if yoghurt is bad?

Depending on the type of yoghurt you choose, the expiration and time it takes to turn bad varies. Here is how you can assess if the yoghurt has become bad:

1.     By sniffing it

The smell of the yoghurt turns foul when it turns bad. You will find a highly unpalatable smell or rotten smell. It will be similar to that of spoiled milk. At the beginning of yoghurt going bad, the smell may not be acute foul. You may find it confusing whether you should consume it or not. But once, the yoghurt is entirely foul, it will be difficult to withstand with that smell, and you will realize that you must throw it away.

2.     Date of expiry

Date of expiration is calculated based on estimation. Hence, it is not a precise way to conclude if yoghurt has turned bad. Sometimes, the yoghurt is good even after its date of expiration. If yoghurt is appropriately refrigerated, it is safe to consume after two weeks of its date of expiration. You should avoid buying yoghurt which has crossed its date of expiration. However, if you find a one lying in your fridge, it is recommended to open it and check once before throwing away finally. Check out the smell, and if there is any mould. If you find them fine, the yoghurt is palatable.

3.     Give a whirl

The consistency of the yoghurt tells a lot about it. A lumpy texture which cuddles at the bottom is an indication of yoghurt turning bad. You can notice the watery consistency at the surface and uneven like cottage cheese at the bottom. If the yoghurt is missing smooth consistency with a creamy texture, it indicates that it has turned bad.

4.     Moulding

The fungus and mould erupt on the spoiled food and yoghurt is not an exception. If you opened your yoghurt container and found moulds and mildew to be prevalent or even hiding at a specific corner, it means, you should throw away your yoghurt. The colour of mould could vary from off-white to orange, green or even black.

5.     Shelf life

The shelf life of an unopened yoghurt container is higher than an opened one. Hence, if you have broken the seal, it is essential to finish it off sooner. If you keep your yoghurt in the fridge immediately after opening it, it may last up to a week.

6.     A shade-card to help

A discolouration in the yoghurt is a clear indication that the yoghurt has turned bad. You need not sit with a shade card and match the exact colour. A noticeable variation in colour like the yellow liquid on the surface is a warning signal.

A word of Caution

Never think of removing the spoiled part of yoghurt and eating away the rest. If a specific part of yoghurt gives away the indication of turning bad, the other parts are likely to be affected and may not be visible with the naked eye. Hence, it would be best if you threw away the entire container.

Frequently Asked Questions

Is it OK to eat expired yoghurt?

Yoghurt within 15 days of expiration day can be consumed safely provided it is refrigerated. The idea is the yoghurt is made from the spoiled milk, and two more weeks will not matter much. However, you should avoid eating yoghurt, which is older than two weeks from the date of expiration as it can lead to severe health consequences.

How long can yoghurt be out of the fridge without going bad?

You can safely keep the yoghurt at room temperature for 2 hours. Any yoghurt which remains at room temperature for more than 2 hours turns bad and is not safe for the consumption. If the temperature of the room is about 90 degrees Fahrenheit, it is safe to consume within 1 hour at room temperature.

Is it bad to eat sour yoghurt?

Sour yoghurt is not good to eat. Regular yoghurt is safe to be consumed within 2-3 weeks. If you find yoghurt to be sour and curdling at the bottom, it is an indication that it has turned bad. The mould starts appearing in the yoghurt when the live cultures and good bacteria die off. Throw away the mouldy yoghurt immediately.

Can yoghurt make you sick?

There are no such side-effects reported from the yoghurt, and it is considered as a healthy food option. However, if it is contaminated with the disease-causing bacteria, you may fall sick with its consumption. Always choose a yoghurt which is prepared, stored, and appropriately refrigerated.

Can Yogurt cause food poisoning?

A moulded yoghurt in which the bacteria and live culture die-off can cause you food poisoning. Hence you must throw away the yoghurt immediately if you find mould over the curd. As most of the dairy products over-stimulate the stomach, if you are already suffering from the food poisoning, you should avoid them such as cheese, yoghurt, ice- cream as it may upset your stomach.

What happens when you eat bad yoghurt?

Bad yoghurt may lead to bacteria, which causes foodborne illness. You may not find a considerable difference in the flavour of the food containing such bacteria. Hence, if you find that yoghurt is not refrigerated properly, the yoghurt may turn bad even before its expiration. Therefore, it would be best if you avoided bad yoghurt.

How long is yoghurt good at room temp?

As per the US Department of Health & Human Services, you should consume yoghurt within 2 hours when kept at the room temperature. It turns rancid and acidic.

How long does yoghurt last in the lunch box?

As mentioned earlier, yoghurt at room temperature remains good to eat for 2 hours. So, once you remove the yoghurt from the refrigerator and put it into your lunch box, you should eat it within 2 hours. If you are planning to use after 2 hours, you should use an insulated bag or box which can maintain the refrigeration temperature for the first few hours.