106- Is the FODMAP Diet the Best Option for SIBO and IBS with Angela Pifer

106- Is the FODMAP Diet the Best Option for SIBO and IBS with Angela Pifer

By Bryan Carroll CFMP, NTP, FAFS

April 23, 2020

Often times when you go to a physician, it is rare for them to mention in detail a nutrition plan to coincide with the treatments they prescribe to you.

But when it comes to SIBO and IBS, there is a diet that is prescribed pretty regularly now, called the FODMAP diet.

While there may have been some initial hope that the FODMAP diet would work well for these conditions, the research might not back it up as much as previously thought. 

What is the FODMAP Diet?

FODMAPs in an acronym that stands for Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols. These are short chain carbohydrates or sugar alcohols that are poorly absorbed by our bodies.

The reason this diet is often prescribed for IBS is because FODMAPs are correlated with abdominal pain and bloating. This is where the research gets fuzzy.

In this episode, Angela Pifer walks us through a bunch of research papers and shows us how our initial ideas around the FODMAP diet may not be as great for IBS as we originally thought.

What To Expect From This Episode

  • How common is SIBO or IBS
  • Current common practices for treating SIBO that may not be the best options
  • What the research has to say about the efficacy of the FODMAP diet 
  • How SIBO and IBS should be treated, and ways to integrate a normal diet back in


  • [2:00] With Angela's 25 years in the health and fitness industry, she has seen a lot of changes over the years
  • [4:30] What percentage of people have SIBO or IBS
  • [6:45] Are IBS and IBD the same diagnosis
  • [9:00] For SIBO overgrowth, are there certain strains of bacteria that are causing issues
  • [11:30] Stool samples can get confusing because different sampling types are used for research vs diagnosis
  • [14:30] Should we be using stool samples as a way to diagnose and treat the microbiome at this point in time
  • [15:30] Are there specific protocols that would work well for SIBO
  • [17:45] If you use antibiotics to treat SIBO, but the issue is actually fungal related, can that cause more issues by killing off the beneficial bacteria
  • [19:00] What does FODMAP actually stand for
  • [28:30] It is interesting in some of the studies between low FODMAP and high FODMAP, the level of methane never changed in the body
  • ​[31:15] A lot of scientific studies are questionnaires which creates very speculative results
  • [34:00] Low FODMAP diets tend to lead people to become more dysbiotic
  • [37:00] Can you use probiotics in a SIBO treatment or will it cause more issues
  • [40:15] Once people improve symptoms, do they tend to fall back to old habits
  • [41:15] If your practitioner puts you on a FODMAP diet, you need to know the why, and have an in and out plan

Resources From This Episode

Some of these resources may contain affiliate links, which provides a small commission to me (at no extra expense to you).

Transcript For Episode (Transcripts aren't even close to 100% Accurate)

Learn More About Angela Pifer

Angela Pifer helps us look at the research behind the FODMAP diet for IBS and SIBO

Angela Pifer helps us look at the research behind the FODMAP diet for IBS and SIBO

About the author

Bryan Carroll CFMP, NTP, FAFS

Bryan Carroll is a certified Functional Medicine Practitioner and Movement Therapist who helps the outdoors community to reduce injuries and improve their health so they can get back to exploring nature. His big health crisis from mold exposure taught him the importance of finding the root causes to illnesses so you can take back control of your life. He is also the host of the Summit For Wellness Podcast.

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