The most basic and fundamental way to deal with food allergies is through the process of observing your child or baby and getting to understand what things he or she is eating during the course of the day. By making notes of this in the form of a food journal, the process of elimination will be that much easier and you may be able to rule certain things out right away.
Of course for infants and serious food allergy reactions, medical intervention will have to come immediately as no parent or caregiver would risk putting their young or severely allergic child through the painstaking process of observation and elimination without some medical support.
The peanut allergy seems to be related to “lupin” which is a decorative European flowering plan. Over the years this plant has been genetically modified and is often used to replace soya.
https://www.empowher.com/food-allergies/content/children-and-food-allergies