Illustration, not a product photo.
Essential oil of oregano (carvacrol-rich), sold in softgels.
494 owner comments (186 with a clear rating) from r/SIBO, r/Microbiome, r/IBS, r/Supplements, r/Constipation, November 2025 to October 2026. Top 39% of the 36 rated supplements.
Value is not rated: the example products differ too much in dose to compare cost fairly. How we score.
Oregano oil is rated about average among the supplements we track: 3.8/5. Of 186 rated owner comments, 126 were positive, 8 mixed and 52 negative; 21 mention an unwanted effect. People talk most about bloating & gas and side effects.
Reddit comments are self-reported and unverified. They tell you what people noticed, not whether a supplement works or is safe for you.
Before starting, check gut supplement safety and interactions. Reddit owners also rank supplements by antibiotics reports. There is a separate ranking of what people with bloating and gas rate highest.
Supplements can interact with medicines. Talk to a doctor or pharmacist first, especially if you are pregnant, take prescription medicine, or have red-flag symptoms. See supplement safety and interactions.
| Context | Rated owner comments | Positive | Negative | Unwanted effects |
|---|---|---|---|---|
| SIBO | 163 | 109 | 47 | 15 |
| Bloating & gas | 35 | 22 | 11 | 4 |
| After antibiotics | 30 | 22 | 8 | 1 |
| IBS-C & constipation | 22 | 16 | 6 | 3 |
| Pain & cramping | 17 | 10 | 7 | 2 |
| IBS-D & loose stools | 16 | 8 | 8 | 7 |
4/5 Bloating & gasFast-acting“Betaine HCl and oil of oregano worked like a magic for me immediately… when I say immediately I mean I felt the relief instantly… I’m not sure if it was 1 or the other or combination of both but my belly was bloating like a ballon after…”
4/5 CostGentle“But tried using stuff to help restore my Immune System & gut health & I used some Oregano oil & even other stuff too that burned the crap out of my Esophagus bcuz our mucus membranes/Esophagus needs to be gentle &/or diluted with a carrier…”
4/5 Bloating & gas“- solved the bloating with berberine and oil of oregano”
2/5“Yes so I started off taking oil of oregano.”
1/5 Pain & cramping“I also tried oregano oil by the brand NOW!”
3/5 Bloating & gas“I was using bio film disruptors and the oregano oil/garlic caps.”
4/5“Oregano oil helped me with IBS–D.”
5/5“Oregano oil messed me up the first time I took it as well.”
4/5“I’ve been taking oil of oregano, a 3-enzyme blend digestive enzyme, and organic neem since Nov 26th, 2025, and the improvement has been huge in such a short time.”
4/5“I took a single dose, but I also was taking oregano oil around the same time, so I’m not sure which did the heavy lifting.”
2/5“Oregano oil gave me such bad heart palpitations that I had to stop using it :(”
4/5“I still had the same tounge issue occasionally and I put pure oregano oil on my tounge for an about a week and it was gone.”
4/5“I definitely want to try oil of oregano but a bit to scared to without doctor's guidance/ a proper protocol to follow.”
4/5 RegularityStool form“Also oregano oil is best to take for 3 weeks and then make a pause.”
4/5“Candibactin AR, which contains oregano oil, helped me the most.”
4/5 Stool form“Oil of oregano is also an option but its strong and tends to make people feel queasy or sweaty and uncomfortable if their body isn't used to it, I don't recommend taking it with other herbal supplements, it's a very handy tool to have on…”
3/5“I’ve found that if I take too much of something, especially Oil of Oregano, I can start to feel tired.”
4/5 Fast-actingStool form“I took a very concentrated natural Oregano Oil supplement several years back while not taking any probiotics.”
4/5 Fast-acting“The only thing I've taken in the 2 years is I recently took b1 with oregano oil and zync, which surprisingly helped almost immediately with energy and sort of feeling life again as I was in dark mode for several months, now I want to get…”
4/5“Oil of Oregano (and other anti-fungal supplements) caused havoc on my system over time.”
4/5“I have definitely heard oil of oregano, which I have tried a bit.”
4/5“What helped me is specofoc type of probiotics and current antimicrobial herbal routine with Oregano Oil, Betaine and Iberogast Advance before sleep for motility.”
1/5“Oil of Oregano gave me the WORST flare and it took 1 week to recover from it.”
4/5“Earlier on (a few years back) I did a protocol that included biofilm busters and oregano oil and a couple of other supplements advised by my then naturopath- but it helped a little and then worsened again after cessation.”
4/5 Urgency & loose stools“Sounds like you’re constipated, I had the opposite issue, but you should know oil of oregano helped me stop getting diarrhea.”
4/5 Regularity“I started with constipation and now I’ve become more regular after incorporating oil of oregano and vitamin c.”
4/5“The oil of oregano and allimed capsules have helped me greatly after antibiotics.”
1/5 Side effects“I didn’t notice much help from herbal antimicrobials like oregano oil and it gave me horrible reflux.”
4/5“The combo of black seed oil & oil of oregano has helped me.”
4/5“I don't recall, I know I did rifamixin and I tried Oil of Oregano, Neem Oil, Allicin, AllixMax, a whole bevy of ginger/artichoke types of motility boosters etc but nothing had any impact except rifamixin helped a bit but was temporary and…”
4/5“Berberine hcl + oregano oil/oliveoil in DRcaps, and double DRcaps für the deep small intestine worked for me.”
4/5“Things that helped me: atrantil, oil of oregano, and neem.”
2/5 Side effectsStopped working“Tried natural antibiotic cause i suspected sibo, oregano oil cause nausea, caprylic acid didn’t seem to give me any reaction, berberine made me back to have a few food intolerance again.”
4/5“Natural antifungals are Oregano oil, Black seed oil as well as Grapefruit seed extract.”
1/5 Pain & cramping“dude yes I took oregano oil in enteric capsules and holy fuck I woke up in the middle of the night in excruciating pain like I had ruptured an appendix or something😂 happened several times before I switched to ADP oregano”
These are examples of Oregano oil products sold on Amazon. They are not ranked by Reddit and the score above is for the ingredient, not a specific product. Check the label for dose and other ingredients.
Published studies (we list them so you can read the evidence yourself; inclusion is not an endorsement):
Across 494 Reddit comments from people who say they have used it, 126 of 186 rated comments were positive and 52 negative, for a GutVerdict score of 3.8/5. These are self-reported experiences, not clinical evidence.
21 of 186 rated owner comments (11%) describe an unwanted effect such as gas, bloating or an upset stomach. Check the safety notes on this page and ask a doctor or pharmacist before starting.
Most rated owner comments come from people in r/SIBO and others who mention SIBO (163 comments, 109 positive).
No. The score summarizes Reddit owner comments only. Factual statements on this page link to NIH or PubMed sources, and nothing here is medical advice.
“The allicin compound is where the magic happens, but you gotta crush or chop it and let it sit for like 10 minutes before cooking to activate it properly.”
What owners report →
“My psychiatrist/medicine manager actually recommended I try berberine, which is a plant based supplement derived from traditional chinese medicine.”
What owners report →
“I went to a doctor that told me to take allicin and candibactin-br for months and it helped rebalance my gut.”
What owners report →Comparisons: Allicin (Allimed / Allimax) vs Oregano oil
Last updated 2026-11-03. Mentions scanned: 1655 in 1014 threads.