A reader asked me to review Antrantil which is often sold for digestive issues.

“Atrantíl is a nutraceutical made up of three botanical extracts that work by calming the gut with Peppermint Leaf (M. balsamea Willd extract), then soaking up hydrogen with Quebracho extract(flavonoid) and stops methane production with Horse Chestnut (Conker Tree extract).” [Product Site]

Unfortunately, there is nothing on PubMed (so no recognized published studies). It’s name is also very close to the name of some very different chemicals!

•  Rh-Catalyzed N-O Bond Cleavage of Anthranil: A C-H Amination Reagent for Simultaneous Incorporation of Amine and a Functional Group.

This is nice to have the three components listed because it allows us to determine a probable profile of it’s action.

• Peppermint impacts are listed on microbiomeprescription

Quebracho extract

Unfortunately, most of the literature deal with cattle and chicken

• Milk fatty acid composition, rumen microbial population, and animal performances in response to diets rich in linoleic acid supplemented with chestnut or quebracho tannins in dairy ewes [2016].
  • “Compared with control animals, the presence of Butyrivibrio  fibrisolvens increased about 3 times in ewes fed CHT(chestnut tannin extract) and about 5 times in animals fed QUE (quebracho tannin extract) . In contrast, the abundance of Butyrivibrio  proteoclasticus decreased about 5- and 15-fold in rumen liquor of ewes fed CHT and QUE diets, respectively. “
• Effects of quebracho tannin extract (Schinopsis balansae Engl.) and activated charcoal on nitrogen balance, rumen microbial protein synthesis and faecal composition of growing Boer goats [2016].
• Impact of Chestnut and Quebracho Tannins on Rumen Microbiota of Bovines [2017].
  • “The ratio of the phyla Firmicutes and Bacteroidetes, a parameter associated with energy harvesting function, was increased in tannins supplemented animals, essentially due to the selective growth of Ruminococcaceae over members of genus Prevotella.”
• Tannins and Bacitracin Differentially Modulate Gut Microbiota of Broiler Chickens[2018].
  • “Tannins-fed chickens showed a drastic decrease in genus Bacteroides while certain members of order Clostridiales mainly belonging to the families Ruminococcaceae and Lachnospiraceae were increased. Different members of these groups have been associated with an improvement of intestinal health and feed efficiency in poultry, suggesting that these bacteria could be associated with productive performance of birds.”

Horse Chestnut

There are some risks with this:
* Acute Effusive Pericarditis due to Horse Chestnut Consumption. [2016]

“Properly processing horse chestnut seed extract removes esculin. The processed extract is considered generally safe when used for short periods of time. However, the extract can cause some side effects, including itching, nausea, gastrointestinal upset, muscle spasm, or headache.”  [NIH]

Bottom Line

There are no human studies on PubMed for two of the ingredients. These items fall under the general classification of gallic acid and tannins , which we know the general impact of on microbiomeprescription.

The marketing site claims “clinical testing with real patients was used to truly identify what combination of a multiple array of natural botanicals could have a positive impact with finding real and meaningful relief.” It appears to be based on unpublished studies of unknown quality.

Economics

45 x 550mg = 24 grams or 0.8 Ounce for $40.00

Versus:

• $9 for 4oz for Peppermint Oil
• $10 for 1oz of Quebracho Powder or $18 for 2 oz of Extract
• $15 for 100gr (3.2 oz) of Horse Chestnut Extract

It is more economic to buy the components by far. It also allows you to see what the impact of each component is. I would avoid the horse chestnut (or do it under MD supervision).

For a digestive product to use a component know to cause “gastrointestinal upset” does raise my eyebrows. 

This is an education post to facilitate discussing this approach with your medical professionals. It is not medical advice for the treatment of any medical condition. Always consult with your medical professional before doing any  changes of diet, supplements or activity. Some items cites may interfere with prescription medicines.

Last night, I caught a podcast from CBC on Quirks & Quarks. The 15 minute podcast is on the page linked. There are two papers linked

• Personalized Gut Mucosal Colonization Resistance to Empiric Probiotics Is Associated with Unique Host and Microbiome Features in the journal Cell
• Post-Antibiotic Gut Mucosal Microbiome Reconstitution Is Impaired by Probiotics and Improved by Autologous FMT in the journal Cell

There are several highlights:

• The murine (mouse) & human gut mucosal microbiome only partially correlates with stool
• Mice feature an indigenous-microbiome driven colonization resistance to probiotics
• Humans feature a person-specific gut mucosal colonization resistance to probiotics
• Probiotic colonization is predictable by pre-treatment microbiome & host features
• Murine gut mucosal probiotic colonization is only mildly enhanced by antibiotics
• Human gut mucosal probiotic colonization is significantly enhanced by antibiotics
• Post antibiotics, probiotics delay gut microbiome and transcriptome reconstitution
• In contrast, aFMT restores mucosal microbiome and gut transcriptome reconstitution

Some quotes from reviews:

“”Although all of our probiotic-consuming volunteers showed probiotics in their stool, only some of them showed them in their gut, which is where they need to be,” says Segal.

They also found that stool only partially correlates with the microbiome functioning inside the body, so relying on stool as was done in previous studies for many years could be misleading.

“Contrary to the current dogma that probiotics are harmless and benefit everyone, these results reveal a new potential adverse side effect of probiotic use with antibiotics that might even bring long-term consequences,” Elinav says. ” [src]

“While probiotics are viewed as safe for healthy individuals, potential harms may be underreported: a recent systematic review of randomized controlled trials of probiotics, prebiotics or synbiotics showed that only nine of 384 trials (2 percent) appropriately reported harms according to guidelines outlined in the CONSORT (Consolidated Standards of Reporting Trials) Statement. Further, the long-term impact of taking probiotics has not been systematically investigated.

In the participants where probiotic strains could be detected, yes, there was a detectable change in their gut microbiome. However, there was no predictability or consistency in the change to the microbiome.” [src]

“Elinav’s group found that six of the treated subjects had higher levels of colonization with the probiotic microbes, whereas the other four remained the same as their baseline….Just by looking at stool samples, the researchers could not differentiate between the two groups—the responders and the nonresponders—corroborating their earlier findings that stool samples may not always reflect what is happening inside the gut. ” [src]

Bottom Line

These papers help clarify that trying probiotics is around a coin-toss in terms of probability. In my humble opinion, non-antibiotic and non-probiotic intervention is looking more and more a better path. It may also be slower, but the changes are more likely to persist.

This recent study, also in Cell, help illustrates the point of diet impacting the microbiome.

My analysis site has the current evidence base interactions between a vast number of substances and the microbiome.

• • Using Antibiotics and Antivirals Drugs
  • Using Prescription Drugs
  • Using Supplements
  • Using Probiotics and Prebiotics
  • Using Diet, Herbs and Spices
  • Other Substances
  • Complete List

While doing my periodic review of articles on PubMed dealing with the microbiome, I came across Gut dysbiosis is associated with the reduced exercise capacity of elderly patients with hypertension [2018].

• “The abundance of Betaproteobacteria, Burkholderiales, Alcaligenaceae, Faecalibacterium and Ruminococcaceae was diminished in subjects with a reduced exercise capacity”
• “Escherichia coli are a primary producer of trimethylamine and inflammation in the human gut, and the abundance of this bacteria was increased in patients with a reduced exercise capacity”

A related article Intestinal Metagenomes and Metabolomes in Healthy Young Males: Inactivity and Hypoxia Generated Negative Physiological Symptoms Precede Microbial Dysbiosis [2018] found that after inactivity (HBR):

• “Eubacterium ventriosum(p = 0.028), Bacteroides sp. (p = 0.045) and Proteobacteria [Escherichia coli (p = 0.026), Shigella sp. (p = 0.029), Veillonella sp. (p = 0.042)] were significantly enriched “
• “members of the genus Bacteroides were significantly enriched at the end of HBR variant [B. xylanisolvens (p = 0.012), B. finegoldii (p = 0.015), B. ovatus (p = 0.015), B. sp. D22 (p = 0.018); B. sp. D1 (p = 0.021), B. thetaiotaomicron (p = 0.021), B. fragilis (p = 0.033), B. caccae(p = 0.036), B. cellulosilyticus (p = 0.04), B. capillosus (p = 0.045), B. dorei (p = 0.048)]. In addition, B. eggerthii (p = 0.02) and B. pectinophilus (p = 0.049) were decreased at the end”
• “a significant increase in the presence of the members of the genus Bacteroides in HBR participants that belonged to species, previously linked to various dysbioses in humans (e.g., intestinal tract inflammation, obesity, insulin resistance, hyperglycemia, metabolic syndrome, T2D “

Hypoxia and inactivity related physiological changes precede or take place in absence of significant rearrangements in bacterial community structure: The PlanHab randomized trial pilot study [2017]

• “The first significantly enriched taxa were probably inflammagenic and mucin degrading species B. thetaiotamicron, B. acidifaciens, B. fragilis, B.dorei and other members of the genus Bacteroides in HBR variant characterized with the most severe inflammation symptoms, indicating a shift towards host mucin degradation and harmful immune crosstalk. “
• “The inactivity-generated negative physiological and psychological symptoms diminished after reintroduction of exercise …over 14 days”

Bottom Line

A change of microbiome is seen in as little as 5 days of inactivity. Once changed, it may take up to 2 weeks after activity is resumed for the microbiome to return to normal. A secondary aspect, from looking at the microbiome of the elderly, is that some microbiome shift may diminish exercise capacity on an ongoing basis.

For those dealing with microbiome dysbiosis associated with an autoimmune condition, it re-emphasis the importance of getting regular daily exercise — but expectations should be not to see any real changes until 2 weeks into this life style changes

While doing my monthly review of recent articles on PubMed dealing with the microbiome, I came across

• Alterations of Gut Microbiome in the Patients With Severe Fever With Thrombocytopenia Syndrome[2018].
  • “Reduced gut microbiota diversity and dramatic shifts of fecal microbial composition in SFTS patients were observed compared with health controls. “
  • “Lachnospiraceae and Ruminococcaceae which could produce short-chain fatty acids were clearly dropped. Sutterella which have anti-inflammation properties were reduced too. On the contrary, some common opportunistic pathogens like Enterococcus and Streptococcus and endotoxin-producing bacteria Escherichia which could rise the risk of infections were increased in SFTS patients than healthy people, in addition lactate-producing bacteria Lactobacillaceae also significantly increased in SFTS patients. “
  • “the changes of gut microbiota of SFTS patients were closely associated with clinical symptoms”

This is in general what I expected to see with my model, especially due to the Bergen experience with a giardiasis outbreak. The increase of lactate producing bacteria is significant because with ME/CFS, a condition that often occurs post viral infection, is often associated with lactic acidosis.

“These results demonstrate that some patients have a disrupted microbiota following Norovirus infection, and therefore may be at elevated risk for long-term health complications.” [2012]

A third article, Antiviral effect of vitamin A on norovirus infection via modulation of the gut microbiome [2016]

• “We demonstrated the inhibitory effect of vitamin A against MNV replication both in vitro and in vivo. Interestingly, these inhibitory effects occurred directly or indirectly via microbiome changes, particularly on Lactobacillus strains in the gut…In previous studies, Lactobacillus spp. exhibited antiviral effects and alleviated the symptoms caused by rotavirus and influenza viral infections..In this study, we demonstrated that Lactobacillus spp. was enriched by vitamin A intake and significantly inhibited MNV replication. “
• “the abundance of Proteobacteria was increased by MNV inoculation, consistent with observations in patients whose gut microbiota was perturbed by human norovirus infection”

Bottom Line

A viral or bacterial infection may have significant impact on the microbiome. If the microbiome does not return to a healthy state, a wide variety of other conditions may arise in the days, months and years following.

I have usually avoid looking at items that are advocated on ideological wishfulness. A reader forwarded me a link to “The Endocannabinoid System’s Intriguing Role in Gut Health” in the Townsend Letter, October 2018, so it’s time to check current reality.

• Endocannabinoids in the treatment of gastrointestinal inflammation and symptoms[2018].
  • ” Results from clinical trials have to be carefully interpreted owing to possible reporting-biases related to cannabinoids psychotropic effects. Moreover, discriminating between symptomatic improvement and the real gain on the underlying inflammatory process is often challenging.”
• Cellular localization and regulation of receptors and enzymes of the endocannabinoid system in intestinal and systemic inflammation[2018].
  • ” In summary, our study reveals changes in gene expression of members of the endocannabinoid system in situ attesting particularly GPR55 and MGL a distinct cellular role in the regulation of the immune response to intestinal and systemic inflammation.”
• The Use of Cannabinoids in Colitis: A Systematic Review and Meta-Analysis.[2018]
  • “There is abundant preclinical literature demonstrating the anti-inflammatory effects of cannabinoid drugs in inflammation of the gut. Larger randomised controlled-trials are warranted.”
• Endocannabinoid-related compounds in gastrointestinal diseases [2018].
  • “the identification of several EC-like compounds able to modulate ECS function without the typical central side effects of cannabino-mimetics has paved the way for emerging peripherally acting drugs. This review summarizes the possible mechanisms linking the ECS to GI disorders and describes the most recent advances in the manipulation of the ECS in the treatment of GI diseases.”
  • Chart below is from this 2018 article

Microbiome Aspect

The few available studies on mice found no impact on lean mice but significant impact on overweight mice [2015]

•  increased Akkermansia muciniphila
• decreased Roseburia
• decreased Bacteroides/Prevotella
• decreased Clostridium coccoides
• decreased Clostridium leptum

And from [2017]

• increased relative abundance of Akkermansia muciniphila
• decreased Lanchnospiraceae and Erysipelotrichaceae

Bottom Line

The use of Endocannabinoids is not a simple use or do not use question. There can be negative effects reported with some studies for some conditions as shown in the table above.

It probable vector of benefit is Akkermansia muciniphila. There is active work in both Europe and the US on creating a Akkermansia muciniphila probiotic. Alternative ways of increasing Akkermansia muciniphila are covered in this earlier post.