Final answer:
Avoiding common allergens like nuts, eggs, grains, and milk can reduce the risk of allergic reactions but cannot totally prevent all food allergies as there are numerous potential allergens and individual immune responses vary.
Step-by-step explanation:
The statement that you can totally prevent food allergies by staying away from the eight major ingredients most likely to cause an allergic reaction is false. While avoiding common allergens such as nuts, eggs, grains, milk, and shellfish can help prevent allergic reactions for those who are allergic to these foods, it is not a guaranteed way to prevent all food allergies. There are numerous other potential allergens, and individuals can have unique food allergies. Furthermore, food allergies are not just determined by avoidance but also by individual immune system responses.