Select Page

Fruits and Vegetables Support Gut Health

Often referred to as the “forgotten organ” thanks to its dramatic impact on our overall health, the human gut microbiome has been and will continue to be a super hot topic, one that all of us should be familiar with and never forget.

Your gut microbiome includes trillions of microbes, including bacteria, fungi and viruses, that regulate the immune system, inflammation, digestion, and much more.

The gut microbiome has been linked to a variety of diseases, including heart heath, diabetes, obesity, autism, depression, Alzheimer’s, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD) and multiple sclerosis.

It’s no wonder these bugs have been the focus of many news articles and research studies.

At this point, you might be wondering what, if anything, you can do to optimize your gut microbiome. Recent studies suggest that what we eat and how we live our lives can directly affect our gut microbiome.

Bear in mind that as of right now we don’t know what constitutes a “normal” or “ideal” gut microbiome, but researchers are working hard to solve that puzzle.  However, the experts strongly suspect that diversity is key.

All of the following factors have been shown to affect the diversity of our gut flora: age, stress, hygiene, intestinal infections, alcohol, antibiotics, smoking, food, breast milk, and vaginal delivery versus cesarean section.

A recent study from the Netherlands provided a list of factors that correlated with changes in the diversity of the microbiome.  Without an advanced degree in microbiology or metagenomics, most of the report is incomprehensible, but I will share with you a few of the key findings without getting too scientific.

  • These dietary factors were associated with a lower level of diversity (not ideal): High energy intake (i.e. lots of calories), processed snacks (undefined), whole milk, and sugar-sweetened soda.
  • These dietary factors were associated with a higher level of diversity (ideal): Coffee, tea, red wine, fruits, vegetables, and buttermilk.
    • Researchers suspect that the antioxidants (specifically, polyphenols) in coffee, tea, and wine  were responsible for their positive impact on gut flora.
    • Buttermilk is more popular in the Netherlands than in the US, but perhaps these findings could extend to yogurt or kefir, all fermented dairy products.  TBD.
    • This study found an association between drinking buttermilk and presence of strains of bacteria that ferment dairy, suggesting a potential role for probiotic dairy drinks to alter gut flora.

These next few bullets are a bit “sciency”, but bear with me…

  • Chromogranin A (CgA) is a peptide that has been shown to be released from cells in response to stress and active GI diseases, including IBS and IBD.
  • This study showed that low CgA was associated with higher microbial diversity (ideal), high concentrations of HDL cholesterol (aka good cholesterol), and eating fruits and vegetables.
  • High CgA was associated with higher levels of fecal calprotectin (a marker for intestinal inflammation), high triglycerides (not good), frequent and loose stool, and self-reported IBS.
  • Low calprotectin (good) was associated with higher intakes of vegetables, plants, and chocolate!
  • To sum up, these findings suggest that eating fruits, vegetables and other plant foods could help with inflammation and cholesterol management.

A few extra fun facts…

  • The use of antibiotics was associated with decreases in the composition of certain bacteria.
  • Proton pump inhibitors (PPIs) and Metformin were correlated with changes in the gut microbiome.
  • Dietary intake of nuts, fruits, and vegetables correlated with certain bacterial strains that are associated with quality of life, triglycerides and HDL cholesterol.  

While these findings are interesting and suggest ways for us to positively modify our gut flora, these findings are very new and the research is limited.

Until more research is done, at a minimum we know that what we eat directly affects our gut microbiome. Eating a wide variety of whole foods, mostly plant foods, limiting highly processed foods and added sugar, and avoiding sugar-sweetened beverages are steps you can take now to support a healthy gut microbiome.

Do you think what we eat affects our gut microbiome?

Get Your FREE Nutritious and Delicious eBook!

Yours FREE when you sign up for our newsletter that's packed full of practical tips, strategies and more to help battle IBD and gut issues!

Nice, you have successfully subscribed! Check your email for a link to the download Nutritious and Delicious!

10 Crohn's and Ulcerative Colitis Friendly Recipes

Yours FREE when you sign up for our newsletter that's packed full of practical tips, strategies and more to help battle IBD and gut issues!

You have Successfully Subscribed!

Crohn's and Ulcerative Colitis Smoothie Cheat Sheat

Yours FREE when you sign up for our newsletter that's packed full of practical tips, strategies and more to help battle IBD and gut issues!

You have Successfully Subscribed!

The RDN Diet Cheat Sheet

Sign up for the RDN Diet Cheat Sheet. A reference guide to help RDNs quickly identify what foods are OK and not OK on well-known IBD diets.


Success! Check your email

The WBF Eat This Challenge

Sign up for our 4-week Eat This Challenge. Each week you’ll get an email with your food or ingredient of the week.

You have Successfully Subscribed!

Pin It on Pinterest

Share This