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Food intolerance and allergy tests are different types of tests that measure your body's reaction to certain foods. A food intolerance test evaluates your body's ability to digest a specific food, such as lactose or gluten. A food allergy test detects your body's immune response to a specific food, such as peanuts or eggs. A food intolerance can cause symptoms such as bloating, gas, cramps, or diarrhoea. A food allergy can cause symptoms such as itching, hives, swelling, or anaphylaxis. A food intolerance is not life-threatening, but a food allergy can be.

The accuracy of these tests depends on the type and quality of the test, as well as the individual's condition and history. Some tests are more reliable and validated than others. For example, a skin prick test or a blood test can be used to diagnose a food allergy, but they are not 100% accurate and may give false positive or negative results. A food intolerance test may use methods such as measuring antibodies, enzymes, or bioresonance, but these methods are not scientifically proven and may give misleading or inconsistent results. The best way to confirm a food intolerance or allergy is to consult a doctor and follow an elimination diet under their guidance.

Some companies may offer discounts for DNA testing, depending on the type and purpose of the test. For example, AncestryDNA offers discounts for its DNA tests for ethnicity and genealogy, especially during holiday sales. You can find coupons, deals, and promo codes for AncestryDNA on various websites, such as (Reuters) or (The Washington Post). You can also find discounts or special offers for other DNA tests online or through your health insurer. However, you should always check the quality and reputation of the company and the test before purchasing it.