IgG Food Sensitivity Test
The IgG Food Sensitivity Test (FST) identifies immune reactions to certain foods (Type III Delayed Hypersensitivity Reaction), which can be a contributing factor to increased inflammation. Many emerging studies show a correlation between elevated IgG food reaction and a variety of conditions, such as:
- Irritable Bowel Syndrome (IBS)
- Crohn's disease
- migraines and headaches
- weight gain
- rheumatoid arthritis
- Attention Deficit Hyperactivity Disorder (ADHD)
The distinction between food sensitivity and food allergy should be understood, as these are two different types of immune responses. Food allergies (Type I Hypersensitivity Reaction - IgE) have a more immediate response after eating the reactive food and can result in hives, difficulty breathing, digestive problems and can even be life threatening (such as an anaphylaxis reaction to peanuts). Conversely, food sensitivities or intolerances can have a more delayed effect that can affect various body systems and aggravate pre-existing conditions, like rheumatoid arthritis.
It has been shown that IgG antibodies against foods is associated with low-grade systemic inflammation. The elimination of triggering foods can improve your quality of life by reducing:
- frequency of relapses of various conditions
- need for medications
- improve overall digestion
The IgG Food Sensitivity Test is done by drawing blood and results are received within 10 days. After which, an individualized dietary plan is formulated that will also avoid the identified triggering foods for a period of three to six months.
FST Fact Sheet
Food Antigen List
Treatment of Crohn's Disease with an IgG4-Guided Exclusion Diet: Randomized Controlled Trial.
Gunasekeera V, Mendall MA, Chan D, and D Kumar. Digestive Diseases and Sciences. Apr. 2016. 61(4): 1148-1157.
Treating Irritable Bowel Syndrome with a Food Elimination Diet Followed by Food Challenge and Probiotics.
Drisko J, Bischoff B, Hall M, and R McCallum. The Journal of American College of Nutrition. Dec 2006. 25(6): 514-522.
Food Elimination Based on IgG Antibodies in Irritable Bowel Syndrome: A Randomised Controlled Trial.
Atkinson W, Sheldon TA, Shaath N, and PJ Wharwell. Gut. Apr 2004. 53: 1459-1464.
IgG Antibodies Against Food Antigens are Correlated with Inflammation and Intima Media Thickness in Obese Juveniles.
Wilders-Truschnig M, Mangge H, Lieners C, Gruber H, Mayer C, and W Marz. Experimental and Clinical Endocrinology and Diabetes. Apr 2008. 116(4): 241-245.
Diet Restriction in Migraine, Based on IgG Against Foods: A Clinical Double-Blind, Randomised, Cross-Over Trial.
Alpay K, Ertas M, Orhan EK, Ustay DK, Lieners C, and B Baykan. Cephalalgia. Jul 2010. 30(7): 829-837.
Food Allergy Mediated by IgG Antibodies Associated with Migraine in Adults.
Arroyave Hernandez CM, Echavarria Pinto M, and HL Hernandez Montiel. Revista Alergia Mexico. Sept-Oct 2007. 54(5): 162-168.