Can you take hydrogen peroxide internally?

I have a question regarding the use of hydrogen peroxide internally. I’m not finding much information on the subject and I have a family member who’s looking into it based on some (limited) online research. Thoughts and feedback would be appreciated.

organicsauce / Originally posted on Glycotoxins


Yikes! Hydrogen peroxide should never be taken internally. It can cause irritation of the gastrointestinal tract with nausea, vomiting, and foaming at the mouth (the foam may obstruct the respiratory tract or result in pulmonary aspiration). Within minutes of ingestion, confusion, coma, convulsions, cyanosis and cardiorespiratory arrest may ensue if the concentration is high enough. Oxygen gas embolism in the brain may cause a stroke even after just a few sips. Most problems occur at concentrations >10%, but even dilute solutions can be toxic. If your family member wants to oxygenate their blood they should try exercising!

Instead of consuming pro-oxidants like hydrogen peroxide, I recommend eating anti-oxidant rich foods. See, for example:

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Dr. Michael Greger

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Michael Greger, M.D., is a physician, author, and internationally recognized professional speaker on a number of important public health issues. Dr. Greger has lectured at the Conference on World Affairs, the National Institutes of Health, and the International Bird Flu Summit, testified before Congress, appeared on The Dr. Oz Show and The Colbert Report, and was invited as an expert witness in defense of Oprah Winfrey at the infamous "meat defamation" trial. Currently Dr. Greger proudly serves as the Director of Public Health and Animal Agriculture at the Humane Society of the United States.

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  • mdvs42

    I’ve never drank Hydrogen P internally, but i do gargle with it?? Hope that’s not bad?
    I haven’t had a sore throat since doing it.

    • AllisonMMG

      Same here!

  • Truth

    Ingesting hydrogen peroxide will only give those side effects when taken improperly. Hydrogen peroxide can be ingested and should be researched and discovered for its proper uses….because it is amazing for the immune system, helping to rid teh body of all sorts of diseases, ailments,etc…including cancer, HIV, ETC. Sorry doctor, but maybe you should be our own research and not believe everything that you were taught in med school, because medical research is funded by pharmaceutical companies who dont want people healthy, in turn for themselves to be

    • Marianne

      Truth-I think Dr Greger has proven himself to be a medical graduate who thinks outside the square. I know about hydrogen peroxide claims and even if 100% correct, there are far more safer alternatives …right here on this website in fact!

    • john

      amen to that

  • Rocio Wabi

    You should know and try

  • karina treacy

    Is there any food that can redduce Brown spots on the skin?. Skintrearments for dark spots?

  • jimmy remove the blindfolds and seek the truth

  • Christ

    I have only used 1/8 of a teaspoon in a cup of water 3x a day to get rid of womanly yeast infections. Since then any time I feel a possible one coming on, I follow this regimen. It keeps it from developing. Thus, I have not had one for 15 years. (My doctor is the one that suggested it after over the counter and prescriptions did not work)

  • GWhiz

    I’ve been taking 3% “food grade” hydrogen peroxide in small amounts for the last few weeks. I spray one or two squirts on the back of my throat and then take a drink of water to wash it down. I do this once or twice a day. It completely cleared out my sinuses and I feel that it also helped clear up a fungal infection. The only side effects I have noticed have been positive. Of course, I would never take any that was stronger than the 3%… and only if it is food grade.

  • sepptorr

    Dr Greger, Do you have a response for the above claims from the posts about H2O2 consumption? Sure would like to hear something that clears this subject up. I have seen lots of claims from websites about H2O2 but they sure seem like scams but if so many people have drank this then why no postings from these people about the bad effects . Please comment!

    • Toxins

      Ask them to present studies so that we can review it! These things are mostly scams.

    • krily

      There are no posts from people like me who believe in peroxide because there are no bad affects. I have even poured 12% straight out of the bottle onto my skin purposely to experience a peroxide burn and this is what ensued. Yes, it burned, but not even real bad. It might have been worse if I plunged my whole hand into peroxide. But who would do that. Anyway, the burn is not like any other chemical that you would associate a burn with. So it burned and bubbled and made the skin white for a few minutes, but the burning does stop on its own once the peroxide has finished killing bacteria. This was a few short minutes and the skin then looked completely normal.
      Peroxide will not hurt you. Learn how to use it. It’s not hard. The 9% and 12% bottles have dilution ratios on the label. Go by that.

  • Krily

    This advice is SO WRONG. I have been using peroxide for 15 years, both internally and externally. Peroxide does not hurt you. Yes, if you get 12% or higher, they should be diluted. Even the bottles at WalMart and the dollar stores should be diluted. But H202 is an instant cure for first symptoms of anything. When I stumbled upon this 15 years ago, it forever changed the way I treat myself for cold and flu and lots of other things.I never buy drugs. My thought to your warning of nausea, vomiting and foaming at the mouth (all three together) is that you have never learned how to use it. I would encourage you to learn. Dilution is the working element. Dilute, dilute, dilute. But let there be just enough to taste it going down. NEVER drink it full strength, which is how I believe you have learned of. Learn to use it. Peroxide is one of nature’s best friends. I am never without peroxide, not even when I go on vacation. You can catch a cold anywhere, anytime so it is always with me. One dose at first symptoms will kick your symptoms and you won’t get sick. Once dose is 1/8t in a cold liquid. I have used water, tea, orange juice and milk. But don’t use milk. Peroxide goes to killing bacteria in that and it is very uncomfortable in the stomach. They say distilled water is best, but I never got any. Never had to.
    Your response to this person who is honestly seeking an answer is very ill-informed. Please don’t do that to people. Get the truth yourself.

    • bilwis

      please… any good side effects should be weighed on the -fact- that it ……………..kills good cells and bad alike .

  • bob luhrs

    My ex-girlfriend is an NP, 25 years in urgent care, created and ran the Fast Track ER program at University of WA medical center for 12 years. She says yes H202 will kill germs. It will also kill defensive cells so that in the future infections are more likely. They only use it when they have no choice, and they cut the 3% solution down 4:1…and even then it is not benign. I know and respect opinions of doctors and researchers. But in an ER with urgent care on a daily basis, I’d not be arguing with those people who do this every single day and know what happens.

  • George

    The good doctor is reluctant to comment on this issue……wonder why……

  • Wedi yatok

    I’m glad H2O2 works for some. For me, I have been taking food grade 35% (greatly diluted in water) daily for a while, but still came down with a cold that lasted 2 weeks. I have seen no health benefits personally, and the almost nauseating feeling it gives me for a few minutes after consumption makes it not worth continuing. I believe when properly consumed it is at least harmless. If not, you’d see a lot of stories about people suffering the ill effects, because it is used by many.

  • Josephine Smith

    I have heard of some people using hydrogen peroxide intravenously for various health issues, is it safe to do that??

  • Larry Oxford

    I take 35% food grade hydrogen peroxide
    every day and it works great for me. So why are you saying no?

  • sidney49

    I have been ingesting food grade H2O2 for over 30 years. For the benefits of ingesting food grade H2O2 read “The One Minute Cure” which was and Amazon best seller.

  • A. Bruton

    There is a doctor on Utube (can’t think of his name) that says –
    “when you feel a cold might be coming on–pour a little Hydrogen Peroxide into your ears”. He says he doesn’t know why it works.
    Anyone tried this?

  • Jack Falcon

    H202 has been taken medicinally for years, diluted for course maybe 2 or 3 drops for a tall glass of water

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