Should You Take a Food Sensitivity Test? By: @drmelissa_co (Link in bio for full article) IgG Food sensitivity testing is one of the tests I receive the most questions about in my practice, and yet it is one of the tests I order the least. Below are the ins and outs of food sensitivity testing, also known as an FST. Each one of us is genetically unique and will have different genetic predispositions for how we digest foods. Furthermore, our diets during childhood and adulthood, lifestyle habits, environmental exposures, medication use, and other factors will play into how well our gastrointestinal tract functions, digests foods, absorbs nutrients and eliminates wastes. When we experience symptoms — whether they are digestive symptoms like bloating, gas, irregular bowel movements, reflux, skin issues, weight changes, depression or irritability, headaches, hormone imbalances, asthma, and other chronic diseases — it is important to note that they may be in part a reflection of consuming foods that are not suitable to our unique bodies and lifestyles. So the question is, can food sensitivity testing tell us more about which foods work for us and which do not? IgG food sensitivity testing is done via blood draw and the blood sample is then exposed to various foods or substances and measured for the total immunoglobulin (IgG) antibodies.