Studies he published related to the Lockey diet, which later developed into the Feingold diet:
- Allergic reactions due to F D and C Yellow No. 5, tartrazine, an aniline dye used as a coloring and identifying agent in various steroids. LOCKEY SD, Annals of Allergy 1959 Sept-Oct;17:719-21
- Hypersensitivity to tartrazine (FD&C Yellow No. 5) and other dyes and additives present in foods and pharmaceutical products. Lockey SD Sr, Annals of Allergy 1977 Mar;38(3):206-10"Tartrazine (FD&C Yellow No. 5) and other allowed certified color additives may have an exacerbating effect in chronic urticaria and asthma sufferers. . ."