Hydrogen Peroxide
Natural Remedies

Hydrogen Peroxide Therapy: Benefits and Side Effects

Cold Sores

Posted by Wendy (Small Town, NC) on 12/09/2008
5 out of 5 stars

Hydrogen Peroxide has worked great for my acne and periodic cold sores. Once or twice a day I swab my face with it after washing. I also rinse with it after brushing. I have not had a blemish or cold sore since!

Posted by Carol (Greenville, USA) on 06/23/2008
5 out of 5 stars

I too have had cold sores all my life and am 50 yrs old now. I had a sore in the inside of my nose for 3 days , first I dapped peroxide.3% on the outside and the inside where I felt it sore and there was no change into the 3rd day. On the 3rd day I inhaled 3 or 4 puffs of a mix of half water and half .3% peroxide cheap kind, from a 2 oz spray bottle that you can buy for .50 in the toothpaste aisle where they have travel size items, and 2 hours later all the nose pain was GONE and no longer had a sore in my nose , it vanished. I also used Apple cider Vinegar. I take the pinch or 1/4th tsp of Baking Soda and 2 TBLS of APPLE CIDER VINEGAR in 4 oz of COLD WATER and it has lowered my heart rate from 117 to 72.This has also lowered my BLOOD PRESSURE from to 112/60 I feel full of energy and I do this before I eat first thing in the morning and last thing at night. I sometimes take it at NOON for a pick me up. I no longer have acid reflux/ GERD. I sleep and breathe better as I have sleep apnea.

Posted by Joy (Denver, Colorado) on 07/17/2007
5 out of 5 stars

... I have tried plenty of the remedies on this site and they have all worked. H202 on a cold sore healed within 48 hours just dipped a q tip in 3%h2o2 and held on for 5 min 4 times a day. Baking Soda and water to gargle for extremely sore throat with swollen glands gone in 1 day. I gargled for about 10 minutes with my head tilted back 3 times thru out the day. Wow is all I can say about this one. thank you all so much this site is a blessing.

Posted by Renee (El Dorado, Kansas) on 05/28/2007
5 out of 5 stars

My vanity for white teeth found me reaching for the peroxide 16 years ago. A side affect was that I was no longer experiencing cold sores (approx 6 a year). My regime was brushing teeth, gums, and tongue with peroxide a couple times a week. When I forgot to do this, the tingling sensation of an outbreak reminded me to do the peroxide treatment and no cold sore surfaced. There have been a few times that I was out of peroxide and got the cold sore but it was gone within 2 days of getting peroxide and the sore was very mild. Apply directly in addition to brushing the entire mouth. I've had two cold sores in the last 15 years. The one during my divorce and the other after getting unjustly fired from my job. Both were mild attacks.

Colds and Flu

Posted by Kylie (Whitianga, New Zealand) on 07/01/2012
5 out of 5 stars

I read about putting 3 drops of hydrogen peroxide in your ears to stop colds & flu on Dr Mercolas website and thought it was quite interesting. They claimed it was successful in 80% of cases if administered within 12-16 hours of the first symptoms appearing. It's midwinter here and everyone in the office came down with a cold, and shortly after I woke with a headache and a sore throat. I checked on earthclinic that others had tried this first, which they had, so that night after work I syringed warmed hydrogen peroxide into my ear canal, (probably more than 3 drops as a pretty much filled the ear canal) lay down with a timer for 10 mins on each side, drank down a large dose of vitamin c, and the next day no symptoms of a cold what-so-ever. I wouldn't have believed it if I hadn't tried it myself. It's a fantastic remedy and over 3 weeks later I still haven't had a cold. I've tried putting the drops in since but they didn't bubble like the first time which I assume means no infection was present. I would recommend trying this if you're in the first stages of cold symptoms as you have nothing to lose.

Replied by Johnsdaughter

so far so good! 3% FG H2O2, 3 drops in each ear for 3 minutes! Diluted 35% into 3% by 1:11 H2O2 to distilled water (pure home distilled)

Used for months as toothpaste 3% 1:2 H2O2 to bicarbonate of soda - fresh, smooth and white teeth!

Use as occasional mouthwash/ gargle yuck but effective

Never knew I had any issues with hearing until I used H2O2 when I felt a cold - boy was tv loud!

Son is convert and loves H2O2 as fizz shows soldiers are battling nasty bugs! He has been a fan since the soldiers fought and vanquished his large and painful :( verruca

Cure was 3% - easy applied with sport cap from drinking bottle isolating verruca and 'solidiers' poured from above. No pain, no worry with spills ....easy!!

Posted by Alexandra (Toronto, On) on 11/11/2009
5 out of 5 stars

Thank you to everyone who has contributed to all of the wisdom on this site. I have been using all of the information for a couple of years but haven't written in till now. Two of my kids (14 and 18) came down with colds this week and then started running fevers. My daughter has also been vomitting so has not been able to do the lysine/Vit C remedy for flu. She also threw up the capful of HP in 1 litre of water remedy so I tried the HP in a cool mist humidifier... I added 2 capfuls to the resevoir of water and after 12 hours of sleep she woke up - no fever, no sore throat!

Replied by Mac
Keaau, Hi

I had a couple questions: first can i do the hydrogen peroxide therapy if i am breastfeeding? furthermore can i do it in order to pass down the hp treatment to my sick baby? and the second question is it alright to give to my sick 3 year old? any information would help, thank you.

Replied by Mark
Philadelphia, Pa, Usa

I don't beleive that there is enough data to support H2O2 intake while breastfeeding. Doing so seems excessively risky to me. Does it not to you? Common sense and risk assessment must rule the day in the absence of data, in my opinion.

Replied by Emelia
Wifi Town , , Usa

I have a question about using H202 as a cold/flu relief. Recently I used 3% grade in my ears as instructed. No problems at all, until I emptied out my right ear after the bubbling subsided. I noticed that the cartilige on the outside of my ear around the opening for the ear canal was red, was that just an irritation from the bubbling or does it usually do that with an infected ear? Thanks.

Posted by Anne (Chicago, Il) on 09/24/2009
5 out of 5 stars

H2O2 in ear for colds: I get sick almost every month, usually with a bad cold during, or right after, my period. I tried H2O2 in my ears right when I was getting that familiar tingle in the back of my throat and tired feeling I always get before a cold. I used about a half a capful of 3% hydrogen peroxide poured into my ears, one at a time, lying on my side and let it sit and fizz for about 10 minutes each before dumping it out. The itchy feeling started disappearing right away and the next day I wasn't sick as I was sure I would be. I normally get sick for a good week or two when I do, so I was really glad it worked!

Posted by Carol (Wellston, MI) on 12/17/2008
5 out of 5 stars

I have used hp as a gargle for many years. My weak spot for a bug to come into my body is my throat, so when I get a sore throat or infected tonsils, I gargle with a capful of 3% hp so that it reaches the tonsils, (gag a little) and then spit it out. Repeat after 2 or 3 hours, and perhaps one more time later in the day. 90% of the time, my oncoming cold is nipped in the bud!

I also use a homemade paste of 3% hp and baking soda, with a drop of peppermint oil for toothpaste. I keep it in a closed jar to prevent drying out.

EC: hp = hydrogen peroxide

Posted by Jennifer (Henderson, NV) on 08/14/2008
5 out of 5 stars

In 2006 I worked in an office where a few women would literally be sick with colds, flu, etc. like every other week. No Joke! Well, they had small children at home and I'm sure this is where they were continuing to pick up viruses from. But they would keep coming to work -they wouldn't call in sick, so they would be coughing, sneezing using the phones, touching fax/copy machines, spreading their germs around continuously on the equipment that we ALL used. SICK of catching their viruses, my friend looked up remedies for the common cold. She found something about peroxide in your ears could stop a cold before it could develop. Well I tried it, and I have been doing it for the past year and a half every time I feel one coming on. If I feel a sore throat, runny nose, etc coming on I just use a small eye dropper and put about 4-5 drops of 3% peroxide (bought at any drug store) in one ear, (tilt head over the sink) and wait about 2-3 mins until you feel the peroxide stop bubbling and get thru the ear wax. Repeat in other ear. This has saved me so much time, money and kept me side-effect free, that I can't be grateful enough for finding out about it. This past winter I worked in another office where mostly women worked, and once again kept getting and bringing to work all the winter time viruses for colds and flu. If I felt anything coming on, I just did the peroxide remedy and am happy to say I remained healthy all winter long while surrounded by repeatedly sick co-workers. I told them all about the peroxide in the ear remedy, but they were skeptical and I don't think any of them tried it. Even when I challenged them to the fact that I was the only one in the office who had not been sick at all and had missed no work~
There should be a LAW :)

Replied by Melissa
New York, NY

Wow! the way you made that story is so convincing. You inspire me to try that now. I am germophobic. When im with all my friends that cough,sneze and pollute the air...i always like either hold my breath or cover my nose and mouth and they take it as rude sometimes...but i just dont want to get sick. Thankyou for writing what you wrote! :)

Replied by Theresa
Auburn, Indiana
5 out of 5 stars

Hydrogen Peroxide kept me from getting the cold/flu I felt coming on. The first time I tried using Hydrogen Peroxide in my both of my ears was when I was visiting my sister in Illinois, about 5 years ago. I had just arrived from the 5 hour drive and could feel that I was getting a cold or flu. My sister suggested placing a few (6 to 7) drops of hydrogen peroxide in my ear, letting it fizz, then let it drain and repeat the process in the other ear. I went to bed that evening after using the hydrogen peroxide and woke up feeling great! I never did get that cold... I've repeated this process each time I felt as though I was coming down with the cold or flu. It has worked 90% of the time. The key is to catch it early! The longer you wait to use the hydrogen peroxide once you have the first symptoms, the less likely it will work. I've shared this with others, but most are hesitant to try it. I haven't had any bad experiences with this method.

Replied by Pahlee
Phila, Pa


Replied by Jana
Columbus, In

I was wondering if the ear that ached after using h202 may have been impacted with wax and the h202 made the wax swell.

Replied by Dr. C. Miller
Minneapolis, Minnesota

Please do A VERY THOROUGH research for the truth - before posting any untruth, half truth or unguided opinion to influence others either knowingly or un-knowingly. Lets clarify one point here - The body does hydrate, dehydrate and detox thru its largest organ the skin with a tremendous surface area. That does not make the ears any less important to treat with hydrogen peroxide. There is overwhelming evidence that colds, flu & virus do enter the body thru the ears. Some postings are from individuals who are either new to this or are convinced there personal experience or opinion is correct although contrary to most and that is ok. Caution is needed as some who visit this site and read what is posted are willing to try everything and some others are afraid to try anything - and to you I say please do your research as if you were going to treat your own beautiful newborn baby before you type as though your words wont matter to anyone. Please study all of the information for yourself first - you must make educated decisions and it is imperative that you educate yourself first before taking foolhardy advice posted on the web from around the world.

This is a great site with great information readily available and with personal experiences too and those are powerful but when hundreds are saying that the ears are the best way to kill a cold and many have this wonderful result, but two of you have a contrary opinion one because he really felt the pain of the infection he had and the other just thinks the skin is a larger surface area but is also afraid of the iv treatment - we dont need to hear it.... We need facts...what was the problem/symptom, what did you do, what was the dose, what was the before and after. THIS WAS NOT STATED TO MAKE ANYONE FEEL BAD OR ACCUSE ANYONE. THERE ARE DANGERS WITH EVERYTHING AND UNLESS YOU ARE UNDER THE CARE OF A DOCTOR WHO PRACTICES IN THIS AREA YOU CANNOT BE TOO CAREFUL - IT WILL BE VERY DIFFICULT TO REGAIN A MEASURE OF HEALTH ONCE YOU DESTROY IT.

Peace and Blessings to all may you find health and happiness and always speak positively and be optimistic about yourself and others.

Replied by William
Fresno, CA

There is a lot of talk here about virus' performing all sorts of acrobats and warfare against humans by mysteriously entering the body from thin air. Lets first get it straight that viruses are genomes, genomes are dead cell matter produced by dying cells. If you want to know what dead cells up to these days, just visit your local cemetary. They don't enter thru your ears or skin. They're DEAD, incapable of launching any tactic, incapable of conceiving the things they are 'reproted' to do. They are the 21st century "demons to be cast out". Get real people, the virus's start inside you and what you really have is too much death when you are sick, H2O2 assists and fortifies your body's natural ability to rid itself of the death (aka virus). WE NEED OXYGEN TO CARRY AWAY THE DEAD CELLS TO THE APPROPRIATE RELIEF PASSAGES TO DETOXIFY WITH MINIMAL TO NO ADVERSE REACTION TO THE PROCESS. Another helpful healer is to stop or reduce the amount of poison you are subjecting yourself to.

Replied by Agnieszka
Springtown, Pa

Ted, I just bought HP-food grade-35% and want to cure my candida with, how should I dilute that, somehow cannot find trustworthy info about it?

Replied by Ben
Kc, Mo,usa

Ted , I read a lot of your stuff. This post is the first thing I've disagreed with. HP in the ear does work. Still a fan, but think you should be more open.

Posted by Sandy (In the sticks, Nevada) on 11/24/2007
5 out of 5 stars

We have been using hydrogen peroxide for years to fight off earaches and colds. My kids and I used to go to the dr. all the time for earaches and end up with a big dr. bill and antibiotics. Then we heard about peroxide. I keep the peroxide in a small glass bottle with an eyedropper. The moment anyone starts to get a sore throat or their ears hurt even a tiny bit, we put one eyedropper full in each ear. Hold the bottle in your hand to warm the peroxide a bit (otherwise it feels like ice water going in) and have the person lie flat on their side. I like to leave the peroxide in until it stops bubbling, but even a few minutes may be enough to help. Drain the peroxide out when you are done and dry the ear thoroughly. A nurse told me that the peroxide would burn a hole through the lining of the ear(Has anyone ever heard of this before?), but we have done this for almost 10 years with no problems.

Replied by Pahlee
Phila, Pa


Posted by Rodica (Mableton, Georgia) on 10/07/2007
5 out of 5 stars

12 yrs. ago I've read a book from _____ about H2O2. I was hooked. I found 35%H2O2 through mail order. I started to drink it diluted about 10 drops in a glass of 10-12 oz. I usually drink it if I had flu or bad colds. In every case the cold cleared in one day. What a blessing was that book for me. I told it to many people about my experience but they were skeptical. Make sure you follow the right amount and it should not be a problem.

Replied by Pahlee
Phila, Pa


EC: 3% H202 is the type sold in drugstores and 35% H202 is considered "food grade" and is sold in some health few stores, but mostly online. Read EC's Where to Buy Food Grade page for more information.

Replied by Pahlee
Philadelpia, Pa

Why is 35% called food grade, would it be because it can be ingested? Please enlighten me.

Replied by Joyce
Joelton, Tn
512 posts

Hello Pahlee,

I think food grade is supposed to be pure H202 and therefore does not contain any stabilizers which the standard drugstore shelf variety does contain. However if you have perused Bill's inhalation method on EC, I think Bill says he uses the drug store shelf H202 for inhalation.

Replied by Mark
Eureka, Ca

I recently learned about h202 and found out that "Food Grade" means it is diluted with distilled water. Regular 3% stuff uses tap water. If you are ingesting or inhaling it you should use food grade. You can dilute your own to 3% with distilled water.

Replied by Rob
Newark, De

Food grade means that it is strong enough to wash fruits and vegetables to kill off anything left on the surface. Food Grade does NOT mean "ingestible". If you use Food Grade HP, make sure to follow carefully all precautions laid out for you on this site. It can be dangerous undiluted.

Replied by Scarycat
La, Ca

You can drink 10 small drops in 16 oz of FOOD GRADE Hydrogen Peroxide. DO NOT ever drink 3% hydrogen peroxide you buy at the drug store that is the kind you put in your ears. Do your reseach.

Posted by Grant Greene (Lafayette, Colorado) on 04/21/2007
5 out of 5 stars

I have been using the following method to treat all colds for the past 15 years, and since first trying it, use nothing else to treat colds. I use the cap from the peroxide bottle and put 1/4 cap of peroxide the rest of the cap is filled with water dripped from the faucet. I put a finger over one nostril and sniff the mixture up the other nostril. I repeat this with the other nostril. One cap full (1/4 peroxide 3/4 water) usually will treat both nostrils. When the solution drain down the nostril passage to the throat I spit it out and blow my nose. Guess what? Instant relief then and there not ten minutes later but then and there. When you blow your nose you will be amazed at what come out. This is especially great for head colds,but also sore throat and stops coughing colds as well. I usually only have to do this twice at about 8 hour intervals. After that or by the next morning were talking, what cold? I have not tried using the inhaling through the mouth method since I have discovered that the cold always appears to be in the nostril passage. Even the sore throat symptom is in the nasal passage between the nose and throat and you will feel where it is when the mixture drains down the nostril passage. If you find that a 1/4 peroxide to 3/4 water too strong, i.e., stings too much, use slightly less peroxide and more water. I sniff rather than spray the mixture as I found that spraying does not atomize and coat the entire nostril passage as well as when the mixture is sniffed. Try it and you will also be amazed.

Replied by Ben
Cartwright, M.b Canada
5 out of 5 stars

Hi we had very good result from 35% hydrogen peroxide with our children, we diluted to 3% we use a spray bottle to spray in their mouth, when they had a sore throat. and also when they have chest pain, like hard breathing, we use a humidifier to mist hydrogen peroxide in to the bed room at night, i put 1/2 gallon of water and 15 oz of 3% hydrogen and turn it on for all night, the first night we use it caleb was about 1 1/2 years, he was very sick, but we were surprised to see how he was doing in the morning, we were very thankful to see him well again, i also use it to brush my teeth, i just spray in my mouth and brush, it works great,i also use it for my ears,i will give the result later..

Replied by Zara
Toronto, Canada

Does the method of using HP in a cool mist humidifier cause lightening of the hair?

Posted by Susan (Atlanta, GA) on 02/05/2007
5 out of 5 stars

Re: Peroxide & Eucalyptus oil in a cool mist humidifier: My 11 year-old daughter is very resistant to trying home remedies other than the little pellets under the tongue (Boiron's products are awesome). Oscillo works AMAZINGLY well if you can take it within a few hours of the onset of flu symptoms. But, a friend told me to mix about 1 part peroxide to 3 parts water into a cool (not hot) mist humidifier and run it at night for her. It is great for breathing, though it does "highlight" the hair and eyebrows (we think it's great :o). I've used this method for years now for the whole family with great results for everything from sinus trouble to the flu. She's been antibiotic-free for about 6 years now. Very impressive for a child that was on about two to three rounds per year.

Posted by Mark (Malaga, Spain) on 10/27/2006
5 out of 5 stars

I had bad sinus infections on and off for a year; Doctor put me on 4 ot 5 different antibiotics, which helped for a while, but infection always came back after treatment finished. Went to a Natural Health doctor, who cured it with herbs and h2o2 !! Now whenever we feel colds starting we gargle with h202 and 9 out of 10 the cold never develops.

Posted by Brian (Newark, OH) on 05/27/2006
5 out of 5 stars

I heard many years ago that the cold/flu virus enters the body through the ears. As a healthcare professional, it seemed utterly ridiculous that anybody would be so "ignorant" as to believe this -- clearly . . . medical science has shown that viruses are typically transmitted through contact with mucous membranes (touch the door knob, pick your nose -- voila). I wasn't feeling well one day -- actually, for about two or three days, and I decided -- what the heck, I'll pour some peroxide in my ears, and see what happens. I swear, on all that is holy -- I did this twice a day for two days, and when I woke the third morning, I felt SO much better! I don't know if the peroxide CURED me or not, but -- my cold was gone -- so, I don't care.

Replied by Pahlee
Phila, Pa

Good for you, if it really worked, but I would like to pass this on, but I need to know how much of the h202 did you use for your treatment for the ears?

Replied by Joyce
Joelton, Tn
512 posts

Answer to question re H202 in the ears:

Hello Pahlee,

I haven't used H202 for colds, but I do use it for external ear infections. For the amount, it depends on the ear. I just fill the ear canal, which for my ear takes about
1/2 capful (standard 1 pint drugstore bottle cap size).

The only contraindication I have heard of is a ruptured tympanic membrane (ear drum) which I question, in view of the fact that it can be taken internally (oral & inhalation methods according to our EC family members). Personally I find my stomach doesn't like H202, but what little goes to the stomach with Bill's inhalation method, so far, it will tolerate.

Replied by Bill
Clarkston, Mich

Good for you Brian. I also was very worried about what would happen if i used hydrogen peroxide. But, here i am 4 years later and i have not had the flu of a cold.

Replied by Scott
Anaheim, Ca

The TCM theory is the ears contain acupuncture points for all the body parts. When you put h202 into the ears, you are putting it directly into your blood system to cure your ailments. This is why h202 works in the ears and why ear acupuncture works also.