Social media is full of wild claims about gut health! Some health practitioners’ advice might be solid, but some is questionable – and sometimes even medical doctors get it wrong. Science is always evolving, so let’s clear up some of the biggest gut health myths.
Myth #1: Sugar and White Flour Cause Yeast Overgrowth
Some functional medicine providers claim that eating too much sugar or refined carbs can cause fungal overgrowth (especially Candida yeast) in the gut, leading to issues like bloating, rashes, and fatigue. They often recommend strict diets, cleanses, or essential oils as treatment.
Here’s the truth: While yeast overgrowth can cause problems like oral thrush or vaginal infections, there’s no solid evidence that sugar or refined carbs trigger an overgrowth of yeast in a healthy gut. True fungal overgrowth in the gut is rare and typically occurs in people with weakened immune systems, prolonged antibiotic or steroid use, diabetes, or severe digestive conditions. And if yeast does overgrow? It’s treated with antifungal medications, not special diets or supplements. That said, cutting back on refined carbs and eating more fiber is great for overall gut health.
Myth #2: Food Sensitivity Tests Are Helpful
Companies love to sell food sensitivity tests, claiming they can pinpoint which foods are causing your child’s digestive issues or even help treat conditions like autism. But these tests aren’t backed by science.
Most of these tests measure IgG antibodies, which are totally different from the IgE antibodies involved in real food allergies. IgG antibodies just show exposure to food, not a harmful reaction. Your baby could test “sensitive” to foods they eat regularly with no problem!
The best way to identify food sensitivities? An elimination diet under medical supervision, where you remove suspected foods, reintroduce them, and watch for reactions. If you’re worried about food sensitivities, talk to your pediatrician or a registered dietitian before spending money on unproven tests.
Myth #3: Lectins Cause “Leaky Gut”
Lectins—naturally found in beans, grains, and some veggies—are often blamed for “leaky gut,” a condition where harmful substances supposedly slip through the intestinal lining and cause inflammation. Some influencers even recommend cutting these foods out completely.
Here’s the truth: While raw beans contain high levels of lectins that can be irritating, cooking destroys most lectins, making these foods safe and healthy. In fact, avoiding them might do more harm than good! Beans and whole grains provide essential fiber, which feeds good gut bacteria and strengthens the gut lining. Studies suggest that a lack of fiber is more likely to harm your gut than lectins ever could.
Myth #4: Laxatives Cause Dependence
Parents often worry that giving their child laxatives for constipation will make them dependent on them for life. But is that true?
Not really. Over-the-counter laxatives like polyethylene glycol (Miralax) and magnesium oxide are generally safe. While stimulant laxatives (like senna or bisacodyl) should be used sparingly, there’s no strong evidence that they permanently weaken the colon. Still, for long-term constipation, fiber-rich foods and hydration should always be the first line of defense.
Your child’s gut microbiome plays a huge role in their health, and while there’s plenty of misinformation out there, focusing on real food, fiber, and a little outdoor play goes a long way.
