The Differences Between IgE and IgG Allergies and How It Relates To Your Health

By Dr. Nicole Cain
Sep 16, 2018
11:49 am

Hi, do you deal with depression, anxiety, stomach upset, fatigue, or even skin rashes? If you said yes to any of these, then you actually might be dealing with food allergies. An allergy is a reaction to something in your environment, whether it’s external or internal.

There are two main types of ways we can test allergies. One is by doing a RAST test; this is a test that allergists might do. This is where they prick the skin and they look for reactions to external things, whether it’s mold, dander, or even foods like eggs and peanuts. This test looks for immediate reactions to these things called IgE. IgE is often responsible for anaphylactic reactions. So for example, somebody eats a peanut and their throat closes up and they require emergency interventions.

The other type of food allergy is a little bit less common; this is called IgG and this is what we are going to talk about today. IgG food reactions are called delayed hypersensitivity reactions. This may be where you eat something like milk on Monday, and on Friday you start to notice congestion in your nose, gas and bloating in your tummy, or you might even feel fatigue, brain fog, or depressed. This kind of test is done by taking a sample of blood from your vein and then the blood is analyzed for IgG immune system cells. These IgG immune system cells will raise in the times that you are allergic to that food or that substance. This is the kind of test that we can run to take a look at what’s causing your symptoms.

The health of your gut impacts the entirety of your well being. Everything boils down to the gut whether it’s your mood, your immune system, your skin, and so much more. To learn more, go to or you could also go to Looking forward to talking with you. This is Dr. Nicole Cain. Thank you.

Jumpstart your health with IgG Food Allergy and Candida Test


A high quality test can help you get a better handle on your individual health. Check out this test developed and recommended by Dr. Nicole Cain.

Learn More »