Abstract:Allergy is an abnormal immune response to substances in the environment, and it is also a public health disease. Vitamins, essential small organic molecules for the human body, are crucial for growth, development, metabolism, and overall health. Studies have shown that supplementing with certain vitamins can help ease allergy symptoms. In this paper, the effects of vitamins A, C, D, and E on allergic diseases were reviewed. Vitamin A alleviates allergies by regulating immune cell differentiation and inhibiting Th2-type immune responses; Vitamin C, with its antioxidant properties, suppresses the activation of inflammatory signaling pathways and reduces the release of allergic mediators; Vitamin D modulates immune responses by balancing Th17/Treg cells and suppressing IgE production; And vitamin E mitigates allergy symptoms via its antioxidant effects, thereby can inhibit pro-inflammatory cytokine production. The purpose of this review is to provide theoretical references and new ideas for the prevention and alleviation of certain allergic diseases.