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You've probably noticed that apples and other produce such as bananas, potatoes, and pears turn brown after they have been cut or bruised. Here's your chance to learn why this happens and what you can do to prevent the discoloration. If you really go for that brown appearance, I even have a way you can worsen the effect. Learn more...


May 3, 2006 at 3:53 pm
(1) Margaux says:

thank you very much this was extremely helpful!!!!!!!

January 24, 2011 at 7:48 am
(2) nicole liang says:

yeah,i agree with you.

September 19, 2006 at 9:18 am
(3) Karla says:

Are eating apples that have turned brown unhealthy for you?

May 17, 2011 at 7:40 pm
(4) malaia says:

yes, it is only because there is a lot of bacteria inside of the apple and bacteria is bad for your health.

June 14, 2011 at 11:53 am
(5) Ben says:

Yeh it is bad for you because the microbes that eat the apple and make it brown will enter your body and will start eating the nutrition in your body aswell.

July 10, 2011 at 2:41 pm
(6) Haley says:

Haha no they are not harmful…. these people need to take a biology class… its just benzoquinone which is simply an antiseptic that the apple produces… its harmless

September 18, 2011 at 1:08 pm
(7) Bensade says:

I agree with Haley. The brown color is from biochemical oxidation, not from bacteria. The browning of a apple slice happens in minutes, but it would take hours or days for bacteria to grow. Besides, there aren’t any bacteria inside an apple.

September 25, 2011 at 5:43 am
(8) candice says:

is there no harmful effects if you will eat the brown part of the apple?

May 3, 2007 at 2:02 pm
(9) melanie says:

i dont think you can stop it

January 24, 2011 at 8:05 am
(10) noah sathra says:

stop what?and thank u helped a LOT in my science fair project this year!DOUBLE thanks!!!!!!!!

May 3, 2007 at 2:04 pm
(11) melanie says:

thanks this site realy helped with my science fair

February 7, 2011 at 10:55 am
(12) makaidah says:

it helped my science fair to

December 17, 2007 at 1:14 pm
(13) dina Antonnita says:

I looooooooooooooooooooooooooooooove this site it is bomb THIssite roks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

March 10, 2008 at 12:43 am
(14) tayyy says:

thank youuu!!
this helped me lotss!
is it unhealthy if you eat them
and can you prevent this from happening?


January 24, 2011 at 8:08 am
(15) melodie says:

I DON’T HAVE YOU’RE IMFORMATION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!UNLESS U PAY TWO BUCKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

August 8, 2008 at 8:41 pm
(16) jasond says:

i love this website it helped me with my sciense assigment

January 24, 2011 at 8:13 am
(17) JASSIE SWITH says:


September 22, 2008 at 1:50 pm
(18) brianna says:

Iluv dis site it helped ,e yahhhh!!!!!!!!!!!!!!!!!!!!!! bit**

November 18, 2008 at 11:23 am
(19) applesupreme says:

this also helped with my science project

January 16, 2009 at 10:47 am
(20) Crystal says:

Words are hard 2 understand…..but its a great site

February 28, 2009 at 10:04 am
(21) Rochelle says:

this really helped me with my bio experiments thanks so much!

April 17, 2009 at 10:18 pm
(22) hollie says:

thanks so much! this was essential to my science assignment :)

January 24, 2011 at 8:23 am


May 29, 2009 at 4:56 am
(24) Roxy says:


September 24, 2009 at 12:38 pm
(25) tyarra gatling says:

thnks so much ive been looknn evri were 4 a science fair activity 4 this year

October 8, 2009 at 7:42 pm
(26) jasmine says:

thank you i will try this 4 my science project

October 8, 2009 at 7:43 pm
(27) jazzy 4ever says:

thank you it really helped my science project

November 2, 2009 at 3:09 pm
(28) meme says:

i love this website

November 2, 2009 at 4:14 pm
(29) Kelcee says:

Thanks You helped me very much

November 12, 2009 at 2:48 pm
(30) EmoKid says:

We had to do cut apple for a science homework, if you leave a cut apple with lemon juice on it wont go brown.

June 29, 2010 at 8:03 pm
(31) the gibonator says:


September 17, 2010 at 3:19 pm
(32) Kenya says:

This really helped, thanks, ALOT!!!!!!!!!!!!

September 20, 2010 at 2:11 pm
(33) sohaib unpluged says:

dude this helped me a lot.ya u know k a bit.

January 11, 2011 at 3:50 pm
(34) nayenayegoinham says:

I Dnt Kno JHow It Turnx THatt COlorr

January 13, 2011 at 6:53 pm
(35) devan says:

this site helped sooooooooooooo much!!!! Thanks!!!!!!!!!!!

January 24, 2011 at 7:55 am
(36) HEEBIES HO says:

they does do experiments,don’t they?cuz i can’t see any!!!!!!!!!!!!!!!!!!!!!

February 13, 2011 at 12:36 pm
(37) melanie's stupid says:

hey melanie, you can too stop it! pour lemon juice on it, stupid!

February 15, 2011 at 1:31 am
(38) natasha says:

Hi …
I have been asked to do some research on why apples go brown by my grade 4 teacher and this was the best answer I could get ..Thank you very much

December 13, 2011 at 6:40 am
(39) Coraline says:

I just love it AND I have a question.
I can you slow down it from getting it brown??????????????

January 2, 2012 at 12:10 pm
(40) allie says:

this helped alot for my school work
luv this wedsite :)

February 3, 2012 at 5:14 am
(41) Dylan says:

thanks 4 doin my schoolwork 4 me

February 6, 2012 at 6:58 pm
(42) buttocks says:

bwabwababababababab i wuv apples

March 27, 2012 at 10:04 pm
(43) I rock! says:

I hate science fairs but this site help a lot with mine. THX! B-)

April 26, 2012 at 3:34 pm
(44) matt says:


May 22, 2012 at 10:29 am
(45) shelby says:

i need help with my project of why do apples turn brown aftre they are cut and left standing…….

September 14, 2012 at 9:52 am
(46) Parker says:

Polyphenol oxidase oxidizes phenolic compounds into quinones and then links the quinones into pigments that make the surface of light colored produce look brown.

November 27, 2012 at 4:22 pm
(47) KharzyGurl12 says:

I dont really know that much about apples and other fruits but i do know that if you put apple’s banana’s or pear’s can have the proces of browning slow down by putting these fruits in lemon juice or 7up

December 4, 2012 at 12:10 pm
(48) madison says:

omg this helped lots thanks anna

February 25, 2013 at 6:56 am
(49) BarettBs2013 says:

Thanks man… helped with my Science Chemistry Project :)

May 23, 2013 at 10:57 pm
(50) bum face says:

this site is lovely

May 23, 2013 at 11:01 pm
(51) katelin says:

i love this website its amazing and it will help me with my diet

September 27, 2013 at 7:42 am
(52) pavan says:

apple contain iron in it, due to that when exposed to atmosphere due to presence of oxygen, iron in apple it turns brown.(it means like rust formation when metals exposed to atmosphere)

December 9, 2013 at 2:39 pm
(53) Divahar says:

Thank you

March 25, 2014 at 8:39 pm
(54) Jaclyn says:

Thanks so much, this was super helpful for my son’s science project.

April 3, 2014 at 1:24 pm
(55) blah blah says:

thx I needed this so much in my science fair thx peeps

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