Illustration, not a product photo.
Lacticaseibacillus rhamnosus GG, one of the most studied single probiotic strains.
53 owner comments (19 with a clear rating) from r/IBS, r/Microbiome, r/SIBO, November 2025 to October 2026. Top 28% of the 36 rated supplements.
Value is not rated: the example products differ too much in dose to compare cost fairly. How we score.
L. rhamnosus GG (Culturelle) is rated about average among the supplements we track: 3.9/5. Of 19 rated owner comments, 18 were positive, 1 mixed and 0 negative; 1 mention an unwanted effect. People talk most about cost 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.
Strain matters more than brand; see probiotic strains explained. Compare the top-rated options for constipation by symptom. People also compare supplements for SIBO on Reddit.
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 | 7 | 7 | 0 | 1 |
| IBS-C & constipation | 4 | 4 | 0 | 1 |
| After antibiotics | 4 | 4 | 0 | 0 |
4/5“One one of probiotics I was taking, LGG get rid of bilophila, but increased desulfovibrio.”
4/5“I have had a lot of great results taking phages with s boulardi (opposes bad bacteria in small intestine) and bifido longum (bb536) with L rhamnosus.”
4/5“I started taking Culturelle Digestive Daily Probiotic twice daily to repair my gut.”
4/5“It's called Culturelle. I think there is some dairy, but I was really desperate and saw it recommended by gastros so I decided to try it.”
5/5“I then introduced Lactobacillus rhamnosus GG and I feel so much better.”
4/5“Back when my doc prescribed L.Rhamnosus it worked like wonders, thought I was recovering.”
5/5“Boulardi, culturelle, occasional Visbiome) that worked wonders for me and started having two poops on a perfect schedule nearly every day (I'm still on the probiotic regimen, and it is helping restore things slowly again).”
4/5“I've been using Culturelle the last 4 years as they were recommended by my gastro when I was having my original issues and they initially worked great.”
4/5 Cost“I switched from Culturelle to Florastor last week - I don't like how expensive it is for how little pills they put in the box, but I'm hoping its more effective!”
3/5“I used Florastor to clear out the bad gut bacteria, dropped Culturelle (did nothing for me), and used Align to repopulate the good stuff.”
4/5 CostSide effects“The Culturelle brand (I was taking) is cheap and widely available.”
5/5“Rhamnosus GG it is like miracle, It works for me.”
4/5“Luckily enough, once my original product has been discontinued (it was from Culturelle IIRC), SuperHMO became available in the EU.”
4/5“I’ve had success using URO brand probiotics and then read about lactobacillus rhamnosus GG and have incorporated that as well.”
4/5“Based on this post from MastAttack, I started with Culturelle probiotics.”
4/5“Culturelle worked great for me”
4/5“I have bilophila and very low dose adp ( I break the pills) and Rhamnosus GG are helping me.”
These are examples of L. rhamnosus GG (Culturelle) 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 53 Reddit comments from people who say they have used it, 18 of 19 rated comments were positive and 0 negative, for a GutVerdict score of 3.9/5. These are self-reported experiences, not clinical evidence.
1 of 19 rated owner comments (5%) 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 (7 comments, 7 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.
“I started taking spore based probiotics lately because it's supposed to help with the health of the valve and it do believe it is helping.”
What owners report →
“I've tolerated taking Florastor 3x a day during antibiotics.”
What owners report →
“when i started vsl#3, which is basically the same formula, it was like a crime scene in the bathroom for a solid ten days.”
What owners report →Comparisons: Saccharomyces boulardii vs L. rhamnosus GG (Culturelle)
Last updated 2026-11-03. Mentions scanned: 276 in 220 threads.