The term “hypo-allergenic” can be misleading.
It does NOT mean that you will never have an allergic reaction to a product. In fact, your body chemistry changes daily and you can use a product or eat a certain food for years and then suddenly become allergic to it.
The correct terminology is ALLERGY-TESTED which means the product has been tested for a likelihood of an allergic reaction occurring, a that occurrence is minimal (but it is still not a guarantee).