An allergy is hard and fast and can have serious life-threatening results – think a peanut allergy and anaphylaxis – this is caused by the immune system in response to a food.
A food sensitivity or an intolerance is usually triggered by the digestive system and causes much less serious symptoms and can take hours or even days to occur.
Any of these can lead to diarrhea, bloating, constipation, gas, nausea, abdominal discomfort, rashes, hives, swelling, acne, eczema, itchy skin, headaches, migraines, respiratory problems, joint pain, fatigue, tiredness, low thyroid, brain fog and mood swings, just to name a few.
It's extremely important to address any food issues so they don't turn into something more.