Understanding Food Intolerance: A Guide by Lyfe Medical Wellness, a Leading Medical Clinic in Phuket

At Lyfe Medical Wellness in Phuket, we firmly believe that understanding your body's unique needs is essential for achieving overall health and well-being. One crucial aspect that often goes unnoticed is food intolerance. Unlike food allergies, which trigger an immediate immune response, food intolerances can lead to delayed and sometimes subtle symptoms that can significantly impact your daily life. In this article, we delve into the world of food intolerance, shedding light on what it is, its symptoms, common intolerant foods, tests for diagnosis, including IgE and IgG tests, and how Lyfe Medical Wellness, a reputable medical clinic in Phuket, can help you manage it.

What is Food Intolerance?

Food intolerance is a non-allergic adverse reaction to certain foods or food components. It occurs when your body struggles to digest or process specific substances, often due to the lack of certain enzymes. Unlike allergies, which involve the immune system, food intolerance is mainly a digestive system issue. This can make identifying the culprits a bit more challenging, as symptoms may not appear immediately after consumption.

Common Symptoms of Food Intolerance

Food intolerance symptoms can manifest in a variety of ways and may vary from person to person. Some of the most common symptoms include:

  • Digestive Issues: Bloating, gas, diarrhea, or stomach cramps after consuming certain foods.
  • Skin Reactions: Rashes, hives, or eczema.
  • Headaches: Migraines or tension headaches.
  • Fatigue: Feeling excessively tired or sluggish after meals.
  • Joint Pain: Unexplained joint pain or inflammation.
  • Mood Changes: Irritability, mood swings, or anxiety.
  • Respiratory Problems: Congestion or breathing difficulties.

Foods Often Associated with Intolerance:

While any food could potentially trigger an intolerance, some are more commonly associated with these reactions:

  • Dairy Products: Lactose intolerance is a well-known example, where the body has trouble digesting lactose, a sugar found in milk and dairy products.
  • Gluten: Found in wheat, barley, and rye, gluten intolerance can lead to digestive discomfort and other symptoms.
  • FODMAPs: These are certain types of carbohydrates found in various foods, which can be problematic for individuals with irritable bowel syndrome (IBS).
  • Histamine-Rich Foods: Foods like aged cheeses, fermented products, and certain cured meats can trigger histamine intolerance.
  • Caffeine and Alcohol: Some people may experience adverse reactions to caffeine or alcohol due to their body's inability to metabolize these substances efficiently.
  • Tests to Determine Food Intolerance

Identifying specific food intolerances involves a comprehensive assessment that takes into account your medical history, symptoms, and sometimes, specialized tests, including IgE and IgG tests. These tests focus on different types of reactions:

  • IgE (Immunoglobulin E) Tests: These tests measure the levels of IgE antibodies, which are associated with fast and immediate allergic reactions. IgE tests are commonly used to diagnose food allergies.

  • IgG (Immunoglobulin G) Tests: IgG tests measure the levels of IgG antibodies, which are associated with more delayed and accumulated immune responses. While controversial and not widely accepted in mainstream medicine, some practitioners use IgG tests to identify potential food intolerances.

At Lyfe Medical Wellness in Phuket, a renowned medical clinic, we offer various diagnostic tests that can help pinpoint the foods causing your discomfort. Some of the commonly used tests include:

  • Elimination Diet: This involves systematically removing suspected trigger foods from your diet for a period of time and then reintroducing them one by one.

  • Food Diary: Keeping a detailed food diary, where you record everything you eat and any symptoms experienced afterward, can provide valuable insights into potential food intolerances.

  • Blood Tests: Blood tests, such as IgG antibody tests, measure the levels of specific antibodies your body produces in response to certain foods.

  • Breath Tests: Breath tests can help diagnose certain intolerances, such as lactose intolerance and fructose malabsorption.

  • Stool Tests: Comprehensive stool analysis can offer insights into your gut health and identify any imbalances that might be contributing to food intolerance symptoms.

  • Hydrogen Breath Test: This test is particularly useful for diagnosing lactose intolerance and small intestinal bacterial overgrowth (SIBO).

  • Skin Prick Tests: Although more commonly used for diagnosing allergies, skin prick tests can sometimes be employed to identify certain food intolerances.

  • Managing Food Intolerance with Lyfe Medical Wellness

At Lyfe Medical Wellness, the esteemed medical clinic in Phuket, we are dedicated to helping you uncover and manage your food intolerances for improved well-being. Our approach involves:

  • Personalized Assessments: Our experienced medical professionals will conduct thorough assessments to identify potential intolerances specific to your body.

  • Customized Diet Plans: Based on your assessment results, we will create personalized diet plans that eliminate or minimize trigger foods while ensuring you receive adequate nutrition.

  • Professional Guidance: Our team of experts will guide you through the process, offering ongoing support, and monitoring your progress.



Understanding food intolerance is a vital step toward achieving optimal health and vitality. By recognizing the symptoms, identifying trigger foods, and undergoing appropriate tests, you can make informed dietary choices that positively impact your well-being. At Lyfe Medical Wellness, the top-tier medical clinic in Phuket, we're here to assist you on your journey to better health by providing personalized care and guidance. Take the first step towards a healthier future by addressing your food intolerances with us. Your well-being is our priority.


Contact Lyfe Medical Wellness in Phuket today to schedule a consultation and embark on a path toward a healthier, more vibrant life.