Expiration Dates Don't Mean What You Think | Adam Ruins Everything 

Depends, it can be my friend.

I wish my yoghurt can talk to me

Some Guy lmao good one! Edit: the comment I responded to was something about the yogurt being hallucinogenic

Napishtim no one wants to be your friend

Kleber Ciscan Same for you if you act like that

To be fair, he said virtually zero. Which is true, not many kitchens have bacterial or fungal spores in the brief moments their milk carton is opened.

Also the packaging (ie Tetra Brick) has a expiry time when the material degradation makes it not bacteria-tight anymore, allowing external bacteria to enter and spoil the food. Just pierce a pack of milk with a needle and wait one week... It will get all bloated and when you open it you will feel it's not very safe to drink ..

Plus pasteurizatiom doesn't kill all the bacteria (and neither kill the mold spores) but reduce it to a safe amount for consuption (that is why you must keep it in the Fridge) How long until this bacteria grows and start being unsafe? View expiry date. (It is true that food flavors and quality gets affected when spoiled BEFORE it is unsafe, so manufactures are a bit conservative as they don't want their brand to get damaged) but please don't drink milk much after the expiry date... UHT in the other hand kills all the bacteria and mold spores, that's why it doesn't need refrigeration if unopened.

@@mrd7610 .

.

Or people who don't look at the dates and just guess

Omg yes! My fiancée thinks food never goes bad and I can’t even eat day old leftovers bc it feels expired to me lolol

I found canned fish at my grandparents's house from 1986 and other things that are pretty old but this is the oldest we have found.

Xd this is my grandpa and grandma

i'm the former, my roommate is the latter. . .

hello()

hello*

I wasn’t till you said but I am now

No

As triggered as the the turnoff switch.

Yet somehow you were able to post this while in your grave. Interesting.

BenieTheDragon well he got better

sindri myr kinda like the life machines in tf2 that brings u back to life.

BenieTheDragon ...

Your grave has better wifi than my bedroom. Whats your hotspot?

chunky.

@@isaacisaac609 funky

Yeah I can’t believe they missed that one, it’s not pasteurized anymore as soon as you open it

Right, i took a sip of strawberry milk a few weeks ago and it was chunky. Immediately spat it back out into a sink and when I saw the exp. date, lo and behold it expired a month earlier

Tvorog begs to differ.

Nice. Stores around here do that primitavely, they do 'quick sale' discounts for food close to expiary. Once i bought 3 pavlova cakes for 3 dollars, 2 for my neibours and one for me to quarter eat and leave in the cupboard for a year then throw away, and it still looked good too lol.

2 years later but that's what my supermarket does too

Is this app available?

Don't know if that worked, but approximately 50% of everything I buy is close to expiring, mostly because it's so cheap where I live.

I honestly don't see why grocery stores (in Florida in the US, at least) don't do markdowns for near-expiry foods more often. Maybe some number-crunching shows it ultimately decreases profit margins? But even if many people were to only buy close-to-expired food for the discount, wouldn't this just amount to price discrimination (not the kind of discrimination you're thinking of) and ultimately increase profits? In any case I've only ever seen like one or two stores do day-old bakery items discounted and nothing else. Which, for $0.75, I'm absolutely buying that day-old loaf of French Bread and figuring out what to do with it later.

9 states don't Shows Il Me: finally we're on TV and it wasn't because one of our governors went to jail

NY has been noticed by my favorite show Me: MOM GET THE CAMERA

LiberalAço hello Doppio

What’s SD

@@captainmillie4017 South Dakota

dat gnome but some food won’t smell bad or anything if it is bad. So that method isn’t effective. If it is, then so many people won’t get sick from food poisoning.

what if the food is already smelly?

Like Adam said, Smell, Colour and Texture, those are the main factors.

@@SDseb i have no idea what food you're talking about. It's really obvious.

I've completely ignored the expiration dates on eggs my entire life. It's something that I learned from my European immigrant parents, where no one even refrigerate eggs. If you're starting to wonder if they're too old, just put them in a deep dish of water. If they stay at the bottom, they're totally fresh. If they stand up but don't float, they're older but not in any way bad. Those eggs make the best deviled eggs because they're so easy to peel. But if they float, it's because they've started to fill with the gases from decomposition. THOSE get tossed!

I check eggs that way too, but I use a mug and I put just a pinch of salt in the water. I use that method because expiration dates are too small on eggs for me to read, but generally expiration dates are accurate here in Italy (milk and beer are exeptions)

@@lizzleonard7256 It's important to refrigerate eggs in America. For some reason, we make our eggs go through a process that destroys the protective outer layer of eggs - they'll go bad quickly if they're not refrigerated here.

Pro tip if it's expired throw it down the drain

I always ignore the expiration dates on eggs

In america too

That's what he's talking about. We have it in the UK too.

We have different ones in the UK; Best Before, Use By, Sell/Display By--the official NHS website states they're supposed to have all different meanings as well. The "use by" is on foods that will likely give you food poisoning, things like smoked fish for example. The "best before" is usually about quality, not safety. The "display/sell by" is as Adam states in this video--it's about stock control for the supermarkets. Most people think all of them mean the same. A lot of foods will also have instructions "use within (insert days) after opening". My grandparents were born before expiration dates were introduced, and had to grow as well as during, as well as deal with the post-WW2 financial crisis. So I, as well as my siblings and mother were taught to just use our senses to determine whether something was bad or not. We use potatoes until they're green, throw away bread when it starts getting fuzzy--a few examples.

That’s the same we have in America. Some label it as “best before”, others label it as “ sell before” others label it “expiration date” it’s not uniform. But throw away expired animal products. Don’t be an idiot like this dude

Yes we do

Your pfp is adorable!

It was HILARIOUS 😆

That's why you always look and smell. If it looks bad and smells bad then it's bad. If it looks good, smell good and taste good then it's good.

I always laugh when people throw cheese away based on "best by" dates. Cheese is basically food we spoil on purpose. Worst case scenario: you've got to scrape some mold of, but it is still edible!

Rob Johns patient 0 please take a seat

Rob Johns no wonder you're writing multiple comments tryna get publicity, it's all that fucked up yogurt that's made you this way

yup if you cant see mold your good XD

To be fair, most condoms are expired due to the lubricant drying up. Making them a lot more prone to breaking if used in a "dry" situation. Lubing them up after expiration date will often revert the state. Unless they have been under solar exposure or stored in a relatively warm place. In that case, they would even expire before the expiration date.

what... No. The expiry date on most drugs is BS. With the exception of antibiotics and anti angina medications (Nitroglycerin) expiration date on pills is completely BS. This doesnt apply to other forms of drugs, like injections, ointments, etc.

@@peteremad1355 No, its not bs. Thermodynamics is a thing. Medicine expiration has 3 possible outcomes: 1, the composition doesnt change much, meaning the actual expiration is a bit later. 2. The chemicals used inside the medicine itself have cancelled the intended effect or 3. The chemicals inside the medicine have reacted to form a more dangerous substance. This is why you cannot ignore the expiration date. But not ignoring doesnt mean you should throw it out instantly, simply that you should investigate and be cautious. For example: In the case of condoms: often its the lubrication, check what kind of condom it is, if the lubrication potentially weakens the condom or if the condom simply dried out(meaning you need more lubrication). In the case of chemicals: check what kind of chemicals you're dealing with and what potential reactions(including reactions with air) can cause the substance to change.

@@Predated2 Well I am a doctor. I dont speak the language of thermodynamics rather that of evidence based medicine. Numerous papers have shown the the efficacy and potency of drugs is still in the 80-90% range after 40-50 years of the expiration date. Analgesics, antipyretics, anti diabetics (excluding insulin), steroids, narcotics and antispasmodics were in the included groups as per the criteria of each individual study. The exceptions to this is as follows: Nitroglycerin all drugs that are in solution or suspensiory forms eye and nose ointments, creams and drops the aforementioned groups should be utilized within 2 weeks of opening Anti- anginal drugs and antibiotics should be used before the printed expiry date Some drug groups has no evidence as to their expiry date effect on their potency due to insuffecient research till now no case of poisoning due to the use of expired drugs has been recorded

My mom uses it to make Kiefer.

ye but bread you cant tell. Mold only grows/shows when it is fully developed, so having spores of mold on your bread is possible. Thats why you shouldnt eat any bread for a month, and see if any mold has fully grown

@@steelpump100 Bread mold is completely harmless

@@ThatWeirdo04 depends on the type

Yup, lawyers are the real reason for "best before" dates!

also, some products like processed meat, fish has a "to be used before..." date. After this date you HAVE to throw it away

Torys Account in greece it says it will spoil at this date

Torys Account wow your english was actually spot on as far as i can see

there's just nearly everything labeled in the EU xD Alcoholic drinks with 10% or more alcohol in it won't have a best before label. Same goes for fresh fruits, veggies and sometimes salt.

You weren’t the only one I’m STILL laughing 😅🤣😂😂😂

I thought it was genius lol

Yeah, it's a problem with US meat in general. They feed animals antibiotics and wash the meat in chlorine, so bacteria tend to be hardened to begin with, and chlorine only causes them to hibernate rather than kill them. Hibernating bacteria do not multiply when cultured, but they can still be spread around a kitchen counter through contamination, and once the chlorine evaporates they wake up and continue on fresh surfaces... Some bacteria are so resistant that even dousing them in pure ethanol will not kill them.. you need extended periods of extreme heat and pressure (like an autoclave) to get rid of those buggers to the extend that they cannot overwhelm someone's immune system...

Albert Nave Well if the shoe fits

Nope! This bad thing exists because of people abusing capitalism. It's the people, not the system giving people the freedom to be shitty.

@@MandMs05 The problem with this idea is that is doesn't give any solution other than people should be better. Of course if everyone was better, we wouldn't have those problems. But we're not. So the system must be adapted accordingly. Hence changing capitalism or destroying depending on political orientation. But definitely not being passive.

@@MandMs05 well (most) corporation abuse it to get more money but they did more damage

@@MandMs05 the system also rewards shittiness through profit motive so

When you keep it refrigerated well, even when it has been exposed to air, the growth of bacteria is so slow you probably won't have to worry about it. Although the risk of it going bad will rise after it's been opened, the risk is still minimal.

Nope

Nope, it's right especially with milk replacements such as soy or almond milk

I'll normally just smell the milk because it's not going to taste great if it smells bad. Also, when there was an issue with my fridge the milk became lumpy within a day. Even if it's safe, I wasn't putting that in my tea. It stank. Absolutely agree with the video that you should trust yourself rather than the company's dates though.

I followed the source Adam listed and it says nothing about spoiled milk being safe to drink. It says you can drink milk after the expiration date, but not that smelly milk is okay to drink

:D

That means it digested properly

Harrison Brietling 😂😂😂😂

Harrison Brietling can you please sub to my chNnel

im so sorry--your ass must be torched

**demonic screeching**

*Expired milk

Eat your cereal

Steve The Talentless you eat your cereal! I love talentless writer

Shiken why haven’t you joined yet

I still do that, actually. Because I buy mostly produce, I had to learn the signs of spoilage for each food. And anything packaged that my family bought when I was younger could be eaten past the best before date as long as it didn't look or smell bad.

Yeah, I always considered expiration dates a recommendation. Milk was really the only thing we threw out, and that was only if it started to be gross. I didn't even know it was a thing to throw out food after the expiration date, Ive never heard of that before. I mean, it says "best by" as in it tastes best to eat it then, not "you will die if you don't eat it by"

Pascal Denis thought it was common sense if it looks good and doesn't smell bad then it's good

Pascal Denis Nope

It’s not about being poor. It’s about having common sense.

Pasteurization also kills a lot of good bacteria, as well as important nutrients.

Pasteurization doesn't kill all the bacteria, just almost all. That's why it still has to be refrigerated before opening, to prevent the bacteria from growing.

As mentioned in the video, once it's in your possession, it's up to you to mind its temp and minimize its exposure. As mentioned in the video, if not cared for correctly things can go bad before the date on the package.

Simboiss Also most companies actually ADD good bacteria into they're dairy products

Tushar Chandra yeah and it doesn’t kill Adams mouth germs before she puts her milk back in her fridge

mariel ivana I watch your videos😃

Bran' the Man Sure thats not suspicious at all

Nope. Not allowed. Gotta drink it.

haha well yea, no one's making you drink it. all they said is that it won't harm you. I wouldn't recommend drinking spoiled milk either :P

Glow Path You wanna fight!? 😡

24 Frames Of Nick the expiration date on my happiness is sooner

goodbye..

Uhhhhhhh........

Always remember you live way longer after your expiration date.

Edgy

Honey has antibacterial properties although some spore forming bacteria (like clostridium) can persist which is why honey shouldn’t be given to infants

Troy Petersen LOL

Extreme!!!

Snacktaduler

No I'm still good...!

*Snacktabulous*

Which makes sense, if you are going to sell food that is going to spoil, wouldn't you want the manufacturer to supply when it is going to go bad (roughly)? Better for a store to throw month old food away, than getting caught selling food that is several months old. Also more often than not the packaging getting fucked up somehow will probably mean it will get thrown out, just like how you can eat bruised fruit just fine, but stores wont sell it.

I work in a restaurant and we are required to throw out any food past the sell by date. We don't request this, and it certainly doesn't make us any money. In fact, it loses us tons of money. However, we have to do it because of food sage standards set by the government. There is a good reason for sell by dates. They aren't just for profit; although that is some of it the main reason is good PR and not being shut down for low health standards.

Lucas Donovan

NoooUGH

Fb the best

Origami Maker what about good stinky food?

[TF] Rickson I don't like blue cheese 😁

if the food is suppose to smell bad then don't eat it anyway. My nose has yet to lie, the most putrid of cheeses taste just as bad as they smells. Its a crime against humanity that people spend the time making this garbage infused mush. (this is obviously a personal preference, for some unknown reason people seem to like the taste)

also not referring to blue cheese, that is extremely tame in comparison to the worst of the worst

Cryptic Cobra you haven't heard of the canned fish in Sweden had you?

Yea

what kinda fucking school you go to?

A Pear i can name more reasons why they should get sued but cant get sued

Mine too. They got sued last year and got shut down.

random chaneell ok well then tell your parents and sue the shit out of them

JebThePleb right? the last line was cheesy

No it wasn't, it was iogurty!

agusti92 bien joué!

JebThePleb They just have to keep scientists, they don't need to be forced to be actors

yep. planning meals and buying only what you are likely to use before it goes bad is a long lost skill.

Anthony Rock I wonder why

Did u even watch the video

Or unless you know it lasts for a long time. Whenever I have to move, the first thing I do is stocking up on lentils, pasta, canned food, honey... I know it's unlikely that they'll expire before I get to eat them and it really helps to have food in the pantry when you don't have much time to shop for groceries.

Frikiman Invest in non perishable food and buy perishable items as required or cook and freeze alongside meal planning and diets. Adjust as time permits for grocery shopping or have your groceries delivered

You get sick from anything, and some comments say otherwise, and you can always find another use for "expired foods"

If it was never in the fridge, then it wasn’t handled properly.

Idiot lol

You are a brave person, On the expiration DAY I wouldn’t even touch a sealed milk carton that has been refrigerated since it was bought.

Hassan DM cringe

Well, you'll only live a few more weeks than you would normally, so.

Just cause it's been pasteurized doesn't mean that the slight backwash that got into the milk from your roommate drinking out of the carton behind your back isn't going to have an effect Bacteria has different phases, the exasperation date tells you when it is out of the lag phase...or should at least I think the point of the video is to point out the US is being weird compared to the rest of the world again... In the lag phase the bacteria doesn't grow and thus it isn't toxic to eat The log phase follows the lag phase and is the time in which the bacteria basically takes over the food. Some bacteria can release toxins that are harmful to you and thus the effected food become unsafe to eat

Yep... Adam, this is on you!!! *Stands in front of traffic*

Gabriel Lockwood *jumps in and drags him out from traffic* Be careful

Actual question, does weed have expiration date?

Reinis Miks yes unless ziplocked it does I’m sry BUD

Dude are u joking or did u really buy heroin

lord bawnchie U serious m8?

The heroin doesn't actually expire in it's solid form. It is the needles that you have to watch out for. The seal on the packaging breaks down over time and may lead to contamination. While you will still experience the same high as with a fresh needle, you may also contract AIDs or have excessive irritation at the injection site. Try to avoid scratching, as this can be mistaken for withdrawal.

Agreed with everything but meat. There are ways you can tell if meat is gone off and many times use by and expire dates lie. For chicken its slime or smell that is a dead give away. Also if you somehow cook the chicken without realising it is off, you can cut it to see the texture, it will feel very weird and different if it is. Also note (as the video said) that if stored incorrectly it could be dangerous even before use by dates.

how does one get into that situation

You have mayo lost in the back of the fridge for 5 years then someone else pulls it to the front of the fridge and then you eat it and have horrid poop for the next several weeks.

PyroPippinGaming XD

Thanks for experiencing that for us haha. I mean I could've told you that would've ended badly.

I had no idea how old it was till I looked for expiration dates and it said five years ago

wait a minute. did you. YOU SON OF A BI-

tastes the same

Yum!

good because i just ate year old cereal

Brendon whatley i never knew condoms had expiration dates

Link The Twink they do, but they don't "expire" technically, just overtime the material gets weak and increases chances of a pop!

Why does it go bad fastrr

Fábio Rodrigues because bacteria in your mouth gets inside the carton, it starts expanding, which makes it go bad faster, this is also why even though spoiled milk is safe, sometimes bacteria is in it which makes it unsafe

See why doesnt this comment have more likes

prezadent1 1 after opening it.will go bad faster human mouth is pretty clean. 2 even if following your train of tought it would be contaminated after drinking , so when he drank its was good and what he was proving was that after the written date its still drinkable not that it wont go bad afterwards , obviously

Fábio Rodrigues you have a point there sir. Sure, an unopen carton of milk passed the expiration date could still be okay to consume, but in the video, it’s easy to be mislead that ALL expired milk are okay to consume passed it’s expiration date, not just the unopened ones as you might have meant. Also, human mouth is not “clean”, there’s lots of bacteria in our mouth that could grow on it’s own outside from our mouth, hence creating a culture of nastiness.

Sour milk is good for cooking with, especially cakes.

Your simping aren't you

@@jakethom2968 Can you blame me?! Look at her!😭

no it will be best for every year

EddieTheLion lucky I watched it before it expired

EddieTheLion this comment is best by unoriginalty JK nice

Ahh dangit, now you tell me

pequeno gamer lol

well, spoiled milk is just the first step to making cheese, so, it's fine

*_I S T I L L S W A L L O W E D_*

Son that wasn't milk...

I don't normally drink milk, But some time back I did an experiment. I bought a half gallon just to test a theory. I shook it up every day really good. After three weeks, it stilled tasted as fresh as day 1. In your face. best buy dates.

Carmeops how do I make cheese with expired milk? I'm serious too

My grandma was a farmer from the Dust Bowl and Great Depression...she didn’t throw any food out unless it was nasty gross

"Remove your nose then,who said you'll need it" -a mola fish

Actually, he doesn't have factual evidence. I looked at the source he gave for milk. It says milk is fine after the expiration date if it hasn't spoiled, but makes no claim that spoiled smelly milk is safe to drink

and tastes terrible

He said that it's safe, not good. You won't die or get seriously sick, but it will taste like crap.

You'll probably also get a stomachache

Lenis Cruz It are a joke you ugly

Ashly King No shit it's a joke he was making one as well also use a period next time.

Ashly King It are a joke two!

go back to russia

Do you even English brah?

This Little Critic my grandma still does

Yup

I never knew it could be used in other ways, thanks stranger!

My grandpa's foreskin produces cheese. Yum!

This Little Critic I was going to vomit until I realized cheese was actually just expired milk

Liz T you dont seem to understand the context here people start counting from sell by as some food have different expiry dates after you open the packaging

Its a "duh" for some of us, but sadly a lot of people take that sell by date as a definite "don't eat after this date!".

Americans and their retardation you know

Ah we have someone using their common sense here, that great! Indeed sell and eat are 2 very different words. The problem is humans in general are stupid. Hence why many of them continue to believe a random date on their food determines its quality, instead of actually looking to see if its good/bad. Common sense isn't common, and that's a statistical fact.

It's got nothing to do with stupidity. If, for example, you're a regular working parent and you don't want to feed your child something that's spoiled or could do harm, what's stupid about checking the "sell by", "use by", "[x] by" dates to make sure? You're really going to call people who are cautious about the dates on their products retarded? And many people have been told their whole lives not to eat something past the listed date. Since its the only indication most people have, it makes perfect sense why they would go by it.

That's kind of all of the Adam Ruins Whatever videos tho.

Sometimes the thing that is "ruined" is something bad such as, in this case, food going bad.

This one ruined it the most for me, I always look at those dates

Micah Philson Spoiled milk is soooooo fucking nasty dude

it's just in your head, fool

Nah, its actually in my nose and on my tastebuds, fool

your nose and tastebuds don't digest food. the only reason you won't drink it is cause you THINK you are sensitive to it. if you smelled spoiled milk for your entire life, is it called spoiled? or just called milk? fool

most of the population is lactose intolerant in the first place, and you are being told that milk is good for your health when it isn't, so what do you expect to feel good about it? It's obvious you are lactose intolerant since you can't stomach it when it starts to turn. Your body knows best.

That's doesn't necessarily mean it's contaminated, you can consume any food and still through up no matter how fresh it is

Exactly there is a RU-vid video of somebody who is blindfolded told he was drinking milk (which was actually orange juice) and threw up because he couldent recognize the taste and he wasn’t allergic to oj either

Dylan Manese nope I'm not it just tasted *bad*

Is milk supposed to have that long of an expiry date?

Hey It's Ava probably cause it tasted gross

...Please don't. It's not designed to inform, It's designed to entertain and make money. There is a huge difference between this and actual educational shows.

Me Cooper so none of this true?

Ani the arctic fox furry piece of shit

Ani the arctic fox It's not exactly that he is wrong, He just presents information poorly. For example, He completely avoids the fact that there is "Sell by date" and "Expiration/Used by date." Sell by date is when the store has to sell it by. Drinking it past that date isn't an issue. The expiration/used by date on the other hand is the date it is no longer safe to consume. Drinking expired milk can not only give you food poisoning and make you sick but although most types of bacteria are killed by heat when milk is pasteurised bacteria can easily get in after it has been opened. Not a problem if the milk is fresh, If it is expired it is very bad.

Me Cooper true, but at least it’s shows like these that open our eyes to the fact that there are problems with the system.

Ok no that is not recommended, many drugs can be unstable, or change composition after a long period. Do not use expired medicine, trust me.

@@ataphelicopter5734 Yeah, she said it has an extension for two months or something, I'm glad I did not take it and convinced her to buy a new one instead.

When I was in school I used to have an IQ of 15. My classmates used to harass me for not being that smart. But since 2013, my life has changed. My IQ is now 195 and it increases by 5 every time I sit down on Saturday nights to watch this one show. It is called Rick and Morty. Because of that, I get all the girls and people are always comparing me to Albert Einstein, some even say that I am the cure for cancer. When the government found out that I watch Rick and Morty, they showed up to my residence and took me to a secret facility to take an exam. The exam was about explaining all the jokes in Rick and Morty and I had to answer each question in all currently spoken languages. Since I watched Rick and Morty, I didn't have any problems and I completed it in 30 minutes. The next day, I got to see the results and I passed the exam with a score of 100%. They gave me the title "Smartest Man in Existence". Guess I am out of this world.

+Johnny Will Rabbi Henrik and Mordecai teach me the Masonic handshakes so that I too can be as smart as an AshkeNazi patent clerk who never invented anything?

That was a little cringy

No I'm still gooood

It's gettin too hot

JustusLM No, Best buy means it's best at that date afterwards it might not be as amazing, but it's safe

(Meric) There is one thing that I don't understand. Why did you write "no"? Also, it will not necessarily be better at that date than at an earlier date. It really depends on the product.

dissertation

JustusLM Same

JustusLM yeah just Best Buy use by and sell buy

? Children are idiots... Carrot always tastes bitter when raw

No mold,no smell,no mushyness,etc.

William Kennedy sure. If it’s oil and vinegar based.

Possibly. Just taste it and let us know.

You alive bro?

William Kennedy Maybe?

No

Erica Riley maybe because he likes chicken breasts 😉 Who knows?

Packaging doesn't have to make sense, you know...

maybe they don't use chickens but roosters ?:DD

because roosters are more commonly used for meat. Chickens are birds so the males and females have as much breast meat as each other (don't breast feed their young) so you can get just as much meat from both but you can also get eggs from hens so you're more likely to keep your hens alive to harvest the eggs

Maybe because they come from a rooster

True

Is that because after it's bought, it only lasts for two weeks before it's eaten up?

But obviously a lot of Americans don't realise that's what it means and just throw it out under the misapprehension that it is unsafe to eat. Come on dude.

youd be surprised how stuoid people can be

Even if some barfed in it?

Yes opening it can do this but if its unopened its fine and as long as you dont keep it out too long new bacteria and other things wont affect it that much as long as temperature and regulations are kept good

Even closed I have opened milk cartons that went bad when opened, due to bad sealing. And unless you properly check if the cartons sealing was fine, theres always that chance. Thats why I usually sake it like crazy and check the openin for any sort of leakage b4 buying it, and then smell it once I arrive home and open and poor it in a glass.Cant be too careful .-.