Saccharomyces cerevisiae, also referred to as Baker's Yeast, is a fungus used to manufacture alcoholic beverages, like beer and baked items. It is also known as Brewer's Yeast occasionally. According to the American College of Allergy, Asthma, and Immunology, more than 50 million individuals worldwide have allergies of some kind. Food allergies make up a tiny percentage of allergies, while yeast allergy represents a minor percentage of food allergies. A yeast allergy may come from: Most types of bread and a few baked items, like cinnamon rolls, croissants, muffins, and biscuits Cereal-based goods Alcohol, particularly wine and beer Gravies, stock cubes, and ready stocks Vinegar and items like pickles or salad dressings that contain vinegar Fermented foods like sauerkraut and ripe cheese Stale fruit Strawberries, blueberries, grapes, and blackberries Yoghurt, buttermilk, and artificial cream Miso, tamarind, and soy sauce Tofu Citrus juice Identifying if a person has yeast overgrowth or yeast intolerance is essential when experiencing a negative response to yeast. Yeast allergy can cause the following symptoms: Hives Congestion  Breathing issues Stomach swelling Lightheadedness  Joint discomfort People with asthma may also get an attack due to this allergy However, no definitive research suggests that airborne allergens can cause life-threatening allergic reactions. Aerosolised yeast is unlikely to cause a response, even in a person with yeast allergy. Even though anyone can acquire a yeast allergy, some people are more susceptible than others. Weakened immunity is believed to be one of the most major risk factors for yeast allergy or yeast overgrowth. Additionally, those who have diabetes mellitus or the ones having a genealogy of yeast allergy are more vulnerable. Furthermore, the risk is higher for people with other types of food allergy. It is possible to confirm hypersensitivity to yeast and other foods via a variety of tests. These consist of: Skin prick test: A tiny drop of the allegedly allergenic substance is applied to the skin and poked with a small needle through the epidermis. RAST: This test gauges the concentration of immunoglobin E (IgE) antibodies in blood. An allergy is probably indicated by a greater level of IgE linked to an allergen origin. Food challenge test: A patient is exposed to progressively larger doses of a potential allergy while a doctor waits for a reaction. This test is thought to be conclusive for most food allergies. Elimination diet: The suspected allergen is temporarily avoided, followed by a slow reintroduction into the diet while any symptoms are noted.