E Roy is used to treat vitiligo, eye problems, enhance sexual ability, strengthen bones, skin diseases, psoriasis, and vitamin A deficiency. E Roy is a nutritional supplement to improve body functions and protect it from harmful factors, as royal jelly contains vitamins, minerals, and active proteins, in addition to antioxidants and rare elements necessary for the body, so it is one of the most important factors that increase body activity and resist tissue damage, especially in the elderly.