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Putting cosmetics in the freezer can kill off Bacteria?

post #1 of 17
Thread Starter 
I saw this on Sunrise this morning.

Yahoo!

I'm not sure if People overseas can see this.

Apparently, if you put your cosmetics in the freezer for 24 hours, it kills off all the bacteria that lives in your makeup.

Some stuff they mentioned, which I knew about, but half of the time, I was sitting there thinking your just saying that to make People who are hell bent against germs rush out and buy replacements.

To their credit, they did mention not to use testers in the shop, that goes without saying, what condition some people leave them in is disgusting!

Surely, if you sanitize things regularly and don't let other People use your liquid things you should be ok right?
post #2 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

Ooooh. Yes of course we do not use departmental store stuff on our face! I'm really curious if it really works, but i also wonder if it will affect the pigmentation of the shadow/blush.

& they said to wash brushes every few months? That's abit little i feel! I wash mine at least every month! If not every other week!
post #3 of 17
Thread Starter 

Re: Putting cosmetics in the freezer can kill off Bacteria?

Yeah thats what I thought, I wash my brushes once a week at least! Not sure about washing them once every few months, thats a bit gross!
post #4 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

I too wonder if the freezer thing works (& doesn't ruin your makeup)! It makes sense.
post #5 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

I'd be afraid to try it on certain cosmetics. (liquid foundation, mascara, etc) just because I'd fear it could alter the chemical composition. Kind of like when a foundation gets too warm and starts to lose cohesion of liquid and minerals? (I noticed that had happened to one of my foundations yesterday...boo!)
post #6 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

If that really does work on any makeup, I'll throw it all in the freezer now!
post #7 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

Not a lot of bacteria can survive freezer temperatures, so it will temporarily kill off the bacteria. But once the preservatives run out it's time to throw away your makeup. Powders last a long time, but lipsticks, lip glosses, mascara, and liquid foundation need to go after 2 years (mascara 3-6 months). When I did a culture on my lipgloss that was like 2 years old that i hardly ever used.. it was filled with bacteria (S. Aureus)
post #8 of 17
Thread Starter 

Re: Putting cosmetics in the freezer can kill off Bacteria?

I don't think it would affect the powdered stuff, but maybe the liquid? Not sure, does anyone have any liquid stuff that's almost due to be chucked and is willing to give it a go?

P.s. did that link work for Overseas People?
post #9 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

Quote:
Originally Posted by xFlossy View Post
P.s. did that link work for Overseas People?
It did! Thanks so much!

I'd be afraid to put certain stuff in there like someone else mentioned. Like, cream color bases and lipsticks - when they cool down and get that condensation on them...know what I mean?
post #10 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

baloney. The only cold that could kill of bacteria is sub zero cold -- not normal freezer cold.. and that I believe is like inverse boiling point for water.. - 130 degrees F. It might ruin the makup tho by changing the texture of the pigments via first freeze and then thaw.
post #11 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

Oh wow, this video makes everything a lot worse than it actually is. First of all the growing of bacteria in those petri dishes are an exaggeration for how much bacteria are actually in your products. Notice how everything on the plate are dots, that means when they started to grow the bacteria, every dot represents 1 single bacteria. The plate that they grow bacteria on are filled with every single nutrient they possibly need, then it's place into their ideal growing temperature and left there for overnight. I'm not trying to downplay how dangerous bacteria can be, but the first 5 minutes make it seem like we're all going to go blind from bacteria.

Freezing makes sense in a way because most of the bacteria on our skins cannot survive at a typical freezer's temperature, which is 4 degrees celcius. I work in a laboratory that does research on bacteria, and we keep our bacteria stock in freezers (typical normal freezers and -20C or sometimes -80C) and bacteria doesn't die. The cold only halts their growth and their multiplication. Only high heat can outright kill a bacteria. So freezing anything is not going to make the product(s) sterile. In terms of liquid makeup, freezing it will not do much, I don't think it will mess with the product because it will change its physical properties instead of chemical. If the product separates, then let it thaw out and remix...but realistically, that much trouble for freezing? =/

For powdered products, spray with rubbing alcohol (70% and above) and let dry. Don't just forget it in the sun as the lady says because there are bacteria in the air as well and it can settle on the product.

Also, do you really want your makeup next to the frozen meat in the freezer? I'd worry more about cross contamination. >.<

And watching your brushes every few months? maybe she meant every few weeks instead, I don't think I can go without washing my brushes every other week lol

But she did give some good tips though, i.e. don't try on displays, swatch is good lol

Also, keeping makeup in bathroom shortens shelf life and can get contaminated as well due to the steam from baths/showers.


LOL sorry for the rant btw >.<
post #12 of 17

Re: Putting cosmetics in the freezer can kill off Bacteria?

Freezing is a good way to store bacteria. Frozen bacteria is not active, but when you take them back to room temperature, they start to grow like nothing had happened to them.
post #13 of 17

I learned so much from reading this post - thanks everyone.

post #14 of 17
Quote:
Originally Posted by sillylilacs View Post

Oh wow, this video makes everything a lot worse than it actually is. First of all the growing of bacteria in those petri dishes are an exaggeration for how much bacteria are actually in your products. Notice how everything on the plate are dots, that means when they started to grow the bacteria, every dot represents 1 single bacteria. The plate that they grow bacteria on are filled with every single nutrient they possibly need, then it's place into their ideal growing temperature and left there for overnight. I'm not trying to downplay how dangerous bacteria can be, but the first 5 minutes make it seem like we're all going to go blind from bacteria.

Freezing makes sense in a way because most of the bacteria on our skins cannot survive at a typical freezer's temperature, which is 4 degrees celcius. I work in a laboratory that does research on bacteria, and we keep our bacteria stock in freezers (typical normal freezers and -20C or sometimes -80C) and bacteria doesn't die. The cold only halts their growth and their multiplication. Only high heat can outright kill a bacteria. So freezing anything is not going to make the product(s) sterile. In terms of liquid makeup, freezing it will not do much, I don't think it will mess with the product because it will change its physical properties instead of chemical. If the product separates, then let it thaw out and remix...but realistically, that much trouble for freezing? =/

For powdered products, spray with rubbing alcohol (70% and above) and let dry. Don't just forget it in the sun as the lady says because there are bacteria in the air as well and it can settle on the product.

Also, do you really want your makeup next to the frozen meat in the freezer? I'd worry more about cross contamination. >.<

And watching your brushes every few months? maybe she meant every few weeks instead, I don't think I can go without washing my brushes every other week lol

But she did give some good tips though, i.e. don't try on displays, swatch is good lol

Also, keeping makeup in bathroom shortens shelf life and can get contaminated as well due to the steam from baths/showers.


LOL sorry for the rant btw >.<



^ Covered everything I was going to mention. The theory behind killing bacteria through freezing is that the water inside of cells will freeze, expand and rupture the cell walls. However, it's not reliable as a lot of bacteria can survive cold temperatures. Freezing only slows down activity, but hardly destroys unless we are talking about ridiculous temperatures that our freezers cannot

 achieve. The purpose of those petri-dishes are to help people identify the type of microbes that are present, by creating a favourable environment for them to grow. The numbers you see on your petri-dish do not corespond to the amount of bacteria in your cosmetics. It's simply saying that this product contains stapholococcus aureus which we also commonly have on our hands. I would not put my make up in the freezer for sterillization purposes. Practice good hygene, do not share, avoid moisture, and use your judgement.

post #15 of 17

I thought that bacteria got killed in the thawing process rather than in freezing.  I could see this working for water-based cosmetics, but not for oil-based products. However, I wouldn't put any liquid cosmetics in the freezer because I don't want a weird consistency.

post #16 of 17

i will try to put all my make up in the freezer but i have just one concern if i put my mascara in the freezer it will turn sticky. and i think it not good to have a sticky mascara, i cant used it anymore.

post #17 of 17

Wow, this is soooo interesting! Im definetely gonna start disinfecting.

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