Is it feasible to effectively supplement a vegan diet without soy?
Laura Schneider
2026-03-24
7 min. read
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Soy is a widespread allergen, which means that vegans who are allergic to soy lose a significant source of protein. Fortunately, there are several alternative products that can help balance a vegan diet.
Soy Allergy
Allergy is an unwanted response of the body to certain allergens (mostly proteins) that is caused by an overreaction of the immune system, most often involving IgE antibodies. Soy allergy affects up to 14% of children with cow's milk allergy. Fortunately, it is often temporary and tolerance for the product increases with age. However, the absence of allergies in childhood does not mean that no allergies will occur later in life. According to the research of T. A. Kamdar and colleagues, soy is a common cause of allergic reactions that occur for the first time in adulthood, immediately after shellfish and fish. Several allergenic proteins in soy have been identified, which are responsible for unwanted reactions. Avoiding soy and products that contain it is the most effective method of preventing allergies. According to the Regulation of the European Parliament and of the Council (EU) No 1169/2011, allergens, including soy, must be clearly distinguished from other ingredients on labels in the list of ingredients, to make it easier for allergic individuals to read labels.
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