In this episode of The Harmony With Food Show, registered dietitian and functional nutritionist Meg Marie O’Rourke takes a deep dive into food sensitivities, food intolerances, digestive symptoms, and personalized nutrition. If you have ever wondered why you feel bloated, exhausted, foggy, or uncomfortable after eating even when traditional food allergy or celiac testing comes back negative, this conversation is for you.Meg explains the difference between IgE food allergies, food sensitivities, and food intolerances, including why some food-related symptoms may be delayed by hours or even days. She also discusses why restrictive elimination diets and low-FODMAP diets can sometimes leave people with an increasingly small list of “safe foods” without answering the bigger question: What is actually causing the reaction?The episode also explores recent research Meg discusses in connection with leukocyte activation testing and cellular immune responses, along with the role testing may play in developing a more individualized nutrition strategy. Meg shares a real client example involving brain fog, bloating, headaches, and onion reactivity, and explains why she believes laboratory results are most useful when they are interpreted alongside a person’s symptoms, health history, microbiome, nutritional status, medications, supplements, and other health data.You’ll also hear about:Food sensitivity symptoms, including bloating, gas, fatigue, headaches, brain fog, joint discomfort, and digestive problemsWhy a negative food allergy test may not explain every food-related symptomThe difference between food allergy, food intolerance, and food sensitivityWhy food reactions can be delayed and dose-dependentHow overly restrictive eating can create anxiety around foodWhy Meg recommends a “Test, Don’t Guess” approachThe importance of personalized nutrition and microbiome testingCross-reactivity between pollen, latex, mold, and certain foodsLatex-fruit syndrome and foods such as banana, avocado, kiwi, chestnut, and tomatoConnections between ragweed, melons, bananas, zucchini, peppers, sunflower seeds, and other foodsWhy interpreting test results matters just as much as obtaining themIf you are struggling with IBS symptoms, chronic bloating, constipation, diarrhea, unexplained fatigue, headaches, brain fog, food reactions, weight-loss resistance, or digestive discomfort, this episode offers a deeper look at why identifying the right questions may be more useful than simply eliminating more foods.Visit HarmonyWithFood.com to listen to more episodes of The Harmony With Food Show, explore Meg’s free nutrition resources, and learn more about functional nutrition, gut health, food sensitivities, inflammation, micronutrients, and personalized nutrition.Test, Don’t Guess. Your body is bio-unique, and your nutrition should be too. About Meg Meg Marie (AKA- Megnificent): Meg is a Registered Dietitian and Functional Nutrition practitioner who helps clients understand the science behind their symptoms. She debunks outdated beliefs like “calories in, calories out,” the overreliance on BMI, and the idea that food isn’t connected to chronic issues such as eczema, joint pain, or fatigue.Her work highlights the powerful role of genetics, microbiome balance, nutrient deficiencies, and food intolerances in shaping long‑term health. Meg bridges the gap between conventional medicine and functional nutrition, empowering people with evidence‑based strategies that support digestion, metabolism, hormones, immunity, and whole‑body wellness. Learn more at: HarmonywithFood.com
