How do you know when Lactaid milk is spoiled?

In this brief guide, we are going to answer the question “how do you know when Lactaid milk is spoiled” with an in-depth analysis of different ways to spot bad Lactaid milk and the health implications of drinking bad Lactaid milk. Moreover, we are going to discuss the shelf life of Lactaid milk.

So without much ado, let’s dive in and figure out more about it.

How do you know when Lactaid milk is spoiled?

You should consider the appearance, texture, smell, and taste of Lactaid milk to give a final verdict about whether or not Lactaid milk has gone bad.


If you spot a mold or some organic growth on your Lactaid milk (a really rare phenomenon), then the best thing you can do in this scenario is to get rid of the whole Lactaid milk.


If the Lactaid milk is curdled or has lumps present in it, then it is an indication of bad Lactaid milk and you should get rid of it.


If you smell a sour or foul smell while taking a sniff test of your Lactaid milk then it is better to get rid of such Lactaid milk.


If the Lactaid milk has passed the visual and the sniff test then you can go ahead and taste it. If you feel some off-flavors (sour or bitter) while tasting a bit of your Lactaid milk then it may point out that your Lactaid milk has gone bad and you should discard it.

You should consider the points mentioned above while making a final verdict on whether or not the Lactaid milk is suitable to consume.

Health implications of drinking spoiled Lactaid milk

Drinking spoiled Lactaid milk can put you at the risk of many food-borne illnesses, especially food poisoning. Drinking spoiled Lactaid milk in a large quantity can cause vomiting, diarrhea, nausea, and abdominal cramps.

A mild food poisoning lasts for about a day or two while a more persistent case of food poisoning can last for about 10 days.

  1. Diarrhea is an indication of the body that a certain obnoxious agent has entered. So consumption of expired or bacteria-laden milk often causes diarrhea.
  1. Food poisoning after consuming bad Lactaid milk is characterized by abdominal pain. Abdominal pain is also accompanied by vomiting and nausea in most cases.
  1. If you have consumed Lactaid milk that has bacterial growth on it then you will experience nausea and vomiting which is the natural defense of the body to get rid of the unwanted harmful substance that has entered the body.
  1. Consuming milk that has gone bad will also raise your body temperature and you can experience fever which is the natural defense mechanism of your body and is the indicator that something is off with your body.

So in case you have devoured bad Lactaid milk and are now suffering from vomiting and diarrhea,  you should try to drink as much water as possible so that while the body is getting rid of the toxins in form of diarrhea and vomiting, the water that you drink will protect your body against dehydration that vomiting can otherwise result in.

Moreover, the symptoms of severe and potentially life-threatening food poisoning involve diarrhea persisting for more than 3 days, fever higher than 101.5 degrees Fahrenheit, symptoms of severe dehydration, and bloody urine. In such a case, you should seek medical help immediately.

What is Lactaid milk?

Lactaid milk has a lactase enzyme additionally added to it that breaks down the lactose part of the milk and makes it suitable for lactose-intolerant people. Moreover, it can have whey and casein present in it (as it is still made from cow milk), therefore it is not suitable for people having milk allergies.

You can read the benefits of lactose-free milk here.

Is Lactaid milk safe to use after the best-before date?

The “best by” or “best before” date that is written on the carton of Lactaid milk refers to the quality rather than safety so the Lactaid milk doesn’t necessarily go bad immediately after the best before date. 

This date refers to the time during which you can enjoy the peak quality and flavor of Lactaid milk but you can still use Lactaid milk that is past this date as long as it was stored properly, there is no leakage in the carton and no signs of spoilage are present.

Shelf life of Lactaid milk

The unopened Lactaid milk has a shelf life of 60-90 days when stored properly. On the other hand, the opened carton of Lactaid milk lasts for about 7-10 days in the fridge when it is stored at 40 degrees Fahrenheit or below, but we recommend you to use it within one week to enjoy its peak flavor and quality.

Open Lactaid milk lasts for about 2 hours when left out in the open. You should discard the open Lactaid milk that has been left in open for more than 2 hours as bacterial growth takes place at a faster pace between the temperature of 40 and 140 degrees Fahrenheit, therefore there are greater chances of the Lactaid milk being already contaminated with bacteria when left out for more than 2 hours.

Moreover, if the temperature of the surroundings is about 90 degrees Fahrenheit, then the process of spoilage takes place at a faster pace and it is recommended to discard Lactaid milk that is left out in the open for more than an hour at 90 degrees Fahrenheit.

It is worth mentioning that these figures are just the estimated shelf life of Lactaid milk and within this time you can enjoy the best quality of Lactaid milk.

Other FAQs about Milk that you may be interested in.

Does Milk Make You Stronger

Does Milk Neutralize Acid

Does Milk Stain?


In this brief guide, we answered the question “how do you know when Lactaid milk is spoiled” with an in-depth analysis of different ways to spot bad Lactaid milk and the health implications of drinking bad Lactaid milk. Moreover, we discussed the shelf life of Lactaid milk.