Walnuts and the Gut Microbiome
Nut-rich diets, such as walnuts, have been shown to play a role in heart health and reducing colorectal cancer. According to a new study, the impact of walnuts on intestinal microbes and the existence of trillions of microbes or bacteria in the gastrointestinal tract may be some of the health benefits. Research results published in the Journal of Nutrition show that edible walnuts not only affect the secondary bile acids produced by intestinal flora and microorganisms, but also reduce the LDL-cholesterol levels of adults participating in the study. Gastrointestinal health is good.
âWe found that when you eat walnuts, it increases the microbes that produce butyric acid, which is a beneficial metabolite that is beneficial to colon health.â Therefore, the interaction of walnuts with the microbiome helps produce some health effects, âHannah Holscher said.
Reducing Secondary Bile Acids
In this study, the diet of 18 healthy male and female adults included 0 grams of walnuts or 42 gramsâabout one-third of a cup or more walnuts in one palmâfor two or three weeks. Fecal and blood samples were collected at the beginning and end of each phase to assess the secondary results of the study, including the impact of walnut consumption on fecal microorganisms and bile acids and healthy metabolic markers. The consumption of walnuts leads to the relative abundance of three bacteria of interest: fecal bacteria, red blood cells, and Clostridium.
The results also showed that compared with the control group, the consumption of walnuts reduced secondary bile acids. Hannah Holscher explained that people with a higher incidence of colorectal cancer have higher levels of secondary bile acids. Secondary bile acids can damage cells in the gastrointestinal tract, and microorganisms can produce secondary bile acids. If we can reduce the secondary bile acid in the intestines, it can also help human health.
How CancerFax Helps
CancerFax is a specialist cancer access and patient-navigation platform. We help patients and families understand their options, organise medical records, coordinate hospital communication, and support cross-border treatment planning where appropriate.
We help collect and organise reports, scans, pathology, biomarker results, and treatment history for structured case review.
We communicate with hospitals or trial teams to assess whether a case may be suitable for further screening.
We support appointment coordination, document submission, translation, and direct communication with international departments.
For international patients, we help with practical coordination â travel planning, hospital admission guidance, and local support.
If this option is not suitable, we help explore other relevant treatments, clinical trials, or advanced care pathways.
From inquiry through to follow-up, our coordinators provide a single point of contact for the family.
CancerFax does not guarantee treatment access, eligibility, or clinical outcome. Our role is to help patients access accurate information, structured review, and appropriate specialist pathways.

About Sai Sree
â Reviewed for medical accuracy by the CancerFax review panel.
Medical Disclaimer
This article is for educational purposes only and should not replace medical advice, diagnosis, or treatment from a qualified oncology specialist. Every patient's case is different. Treatment decisions should always be made after a review of complete medical records by the treating medical team.
Treatment availability, eligibility, timelines, and access can change. Any clinical trial participation depends on detailed review and approval by the trial hospital or investigator.
