The immune system’s IgG response targets proteins, not lipids. Some individuals may wonder whether they can consume butter if they are sensitive to casein or soy lecithin if they are sensitive to soy. Trace amounts of the corresponding protein have been discovered during the extraction process for these components. However, the protein levels are generally low and not likely to cause issues. The majority of individuals can tolerate these trace amounts, but a few may not. For those uncommon situations, an elimination and reintroduction phase could aid in further examination.